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Document and Entity Information - shares shares in Millions	6 Months Ended
Document and Entity Information - shares shares in Millions	Aug. 01, 2015	Jul. 11, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 01, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	MRVL
Entity Registrant Name	MARVELL TECHNOLOGY GROUP LTD
Entity Central Index Key	0001058057
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		511.2

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 927,530	$ 1,210,977
Short-term investments	1,410,117	1,318,578
Accounts receivable, net	417,721	420,955
Inventories	327,103	308,162
Prepaid expenses and other current assets	68,883	68,140
Deferred income taxes	17,223	17,228
Total current assets	3,168,577	3,344,040
Property and equipment, net	322,262	340,639
Long-term investments	10,123	10,226
Goodwill	2,029,945	2,029,945
Acquired intangible assets, net	24,592	30,698
Other non-current assets	110,457	128,839
Total assets	5,665,956	5,884,387
Current liabilities:
Accounts payable	289,023	282,899
Accrued liabilities	160,969	131,388
Carnegie Mellon University accrued litigation settlement	733,557
Accrued employee compensation	126,038	154,969
Deferred income	59,652	68,120
Total current liabilities	1,369,239	637,376
Non-current income taxes payable	55,283	68,729
Other non-current liabilities	27,437	32,193
Total liabilities	1,451,959	738,298
Commitments and contingencies (Note 10)
Shareholders' equity:
Common shares	1,015	1,030
Additional paid-in capital	2,989,011	3,099,548
Accumulated other comprehensive income (loss)	(1,278)	308
Retained earnings	1,225,249	2,045,203
Total shareholders' equity	4,213,997	5,146,089
Total liabilities and shareholders' equity	$ 5,665,956	$ 5,884,387

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Aug. 01, 2015	Jan. 31, 2015
Common shares, par value	$ 0.002	$ 0.002

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Net revenue	$ 710,492	$ 961,545	$ 1,434,780	$ 1,919,375
Operating costs and expenses:
Cost of goods sold	461,719	477,741	812,872	971,601
Research and development	285,641	294,352	565,755	585,033
Selling and marketing	30,841	33,997	67,015	72,307
General and administrative	35,243	30,962	75,678	61,177
Carnegie Mellon University litigation settlement	654,667		654,667
Restructuring and other related charges	13,000	735	13,592	5,823
Amortization and write-off of acquired intangible assets	2,568	3,304	5,136	9,993
Total operating costs and expenses	1,483,679	841,091	2,194,715	1,705,934
Operating income (loss)	(773,187)	120,454	(759,935)	213,441
Interest and other income, net	6,790	12,263	11,957	14,188
Income (loss) before income taxes	(766,397)	132,717	(747,978)	227,629
Provision (benefit) for income taxes	5,543	(6,153)	9,872	(10,720)
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Net income (loss) per share:
Basic	$ (1.49)	$ 0.27	$ (1.47)	$ 0.47
Diluted	$ (1.49)	$ 0.27	$ (1.47)	$ 0.46
Weighted average shares:
Basic	516,368	511,821	516,298	508,463
Diluted	516,368	520,269	516,298	520,510
Cash dividend declared per share	$ 0.06	$ 0.06	$ 0.12	$ 0.12

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Other comprehensive income (loss), net of tax:
Net change in unrealized gain (loss) on marketable securities	(1,458)	(221)	(3,318)	157
Net change in unrealized gain (loss) on auction rate securities	12	(34)	(103)	143
Net change in unrealized gain (loss) on cash flow hedges	88	473	1,835	(270)
Other comprehensive income (loss), net of tax	(1,358)	218	(1,586)	30
Comprehensive income (loss), net of tax	$ (773,298)	$ 139,088	$ (759,436)	$ 238,379

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Cash flows from operating activities:
Net income (loss)	$ (757,850)	$ 238,349
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	51,811	53,269
Share-based compensation	69,895	64,989
Amortization and write-off of acquired intangible assets	6,106	10,963
Non-cash restructuring and related charges	1,473	17
Other non-cash expense (income), net	1,721	(6,143)
Excess tax benefits from share-based compensation	(25)	(76)
Changes in assets and liabilities:
Accounts receivable	3,234	(30,159)
Inventories	(18,415)	(46,299)
Prepaid expenses and other assets	11,328	(27,157)
Accounts payable	11,958	87,686
Accrued liabilities and other non-current liabilities	8,058	2,962
Carnegie Mellon University accrued litigation settlement	733,557
Accrued employee compensation	(28,931)	22,550
Deferred income	(8,468)	21,140
Net cash provided by operating activities	85,452	392,091
Cash flows from investing activities:
Purchases of available-for-sale securities	(566,365)	(335,770)
Sales and maturities of available-for-sale securities	469,790	372,410
Distribution from (investments in) privately-held companies	208	(441)
Purchases of technology licenses	(5,677)	(9,409)
Purchases of property and equipment	(24,320)	(31,954)
Purchase of equipment previously leased	(10,240)
Net cash used in investing activities	(136,604)	(5,164)
Cash flows from financing activities:
Repurchase of common stock	(195,584)
Proceeds from employee stock plans	57,174	68,374
Minimum tax withholding paid on behalf of employees for net share settlement	(23,007)	(24,923)
Dividend payments to shareholders	(62,104)	(60,992)
Payments on technology license obligations	(8,799)	(2,677)
Excess tax benefits from share-based compensation	25	76
Net cash used in financing activities	(232,295)	(20,142)
Net increase (decrease) in cash and cash equivalents	(283,447)	366,785
Cash and cash equivalents at beginning of period	1,210,977	965,750
Cash and cash equivalents at end of period	$ 927,530	$ 1,332,535

The Company and Basis of Presentation

6 Months Ended

Aug. 01, 2015

The Company and Basis of Presentation

Note 1. The Company and Basis of Presentation

The Company

Marvell Technology Group Ltd., a Bermuda company, and its subsidiaries (the “Company”), is a fabless semiconductor provider of high-performance application-specific standard products. The Company’s core strength of expertise is the development of complex System-on-a-Chip and System-in-a-Package devices, leveraging its extensive technology portfolio of intellectual property in the areas of analog, mixed-signal, digital signal processing, and embedded and stand alone integrated circuits. The majority of the Company’s product portfolio leverages embedded central processing unit technology. The Company also develops platforms that it defines as integrated hardware along with software that incorporates digital computing technologies designed and configured to provide an optimized computing solution. The Company’s broad product portfolio includes devices for data storage, enterprise-class Ethernet data switching, Ethernet physical-layer transceivers, wireless connectivity, Internet-of-Things devices and multimedia solutions.

Basis of Presentation

The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. In a 52-week year, each fiscal quarter consists of 13 weeks. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2016 and 2015 each have a 52-week period.

The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments consisting of normal and recurring entries considered necessary for a fair statement of the results for the interim periods have been included in the Company’s unaudited condensed consolidated balance sheet as of August 1, 2015, the results of its operations for the three and six months ended August 1, 2015 and August 2, 2014, its comprehensive income for the three and six months ended August 1, 2015 and August 2, 2014, and its cash flows for the six months ended August 1, 2015 and August 2, 2014. The January 31, 2015 condensed consolidated balance sheet data was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015, but does not include all disclosures required for annual periods.

These condensed consolidated financial statements and related notes are unaudited and should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 as filed on March 26, 2015 with the Securities and Exchange Commission. The results of operations for the three and six months ended August 1, 2015 are not necessarily indicative of the results that may be expected for any other interim period or for the full fiscal year.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to performance-based compensation, revenue recognition, provisions for sales returns and allowances, inventory excess and obsolescence, investment fair values, goodwill and other intangible assets, restructuring, income taxes, litigation and other contingencies. In addition, the Company uses assumptions when employing the Monte Carlo simulation and Black-Scholes valuation models to calculate the fair value of share-based awards that are granted. Actual results could differ from these estimates, and such differences could affect the results of operations reported in future periods.

Principles of Consolidation

The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The functional currency of the Company and its subsidiaries is the U.S. dollar.

Recent Accounting Pronouncements

6 Months Ended

Aug. 01, 2015

Recent Accounting Pronouncements

Note 2. Recent Accounting Pronouncements

Accounting Pronouncements Recently Adopted

In April 2014, the Financial Accounting Standards Board (“FASB”) issued an amendment to its guidance regarding the reporting requirements of discontinued operations, which was effective for the Company beginning in the first quarter of fiscal 2016. Under the amended guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. As a result, the Company has adopted and will apply the new guidance for any future dispositions that meet the criteria of a discontinued operation under the amendment.

In November 2015, the FASB issued a new standard to simplify the presentation of deferred income taxes. Currently, deferred income tax assets and liabilities are separately presented as current and non-current amounts on the consolidated balance sheet. The new standard will require that deferred tax assets and liabilities be classified and presented on the balance sheet as non-current. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016, although early adoption is permitted. The Company will adopt the new guidance at the beginning of its fourth quarter of fiscal 2016 on a prospective basis, and will not retrospectively adjust any prior periods. Adoption will have no impact on the Company’s consolidated results of operations and it had no material impact on working capital.

Accounting Pronouncements Not Yet Effective

In May 2014, the FASB issued a new standard on the recognition of revenue from contracts with customers, which will supersede nearly all existing revenue recognition guidance under GAAP. Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and assets recognized from costs incurred to obtain or fulfill a contract will also be required. The FASB subsequently issued an update to this standard in August 2015, which provides deferral of the effective date by one year. The standard is now effective for the Company’s first quarter of fiscal 2019 and allows for either full retrospective or modified retrospective adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016 and including interim reporting periods within such reporting period.

The FASB has since issued additional updates of its new standard on revenue recognition issued in May 2014. In March 2016, an amendment was issued to clarify the implementation guidance on principal versus agent consideration. The guidance requires entities to determine whether the nature of its promise to provide goods or services to a customer is performed in a principal or agent capacity and to recognize revenue in a gross or net manner based on its principal/agent designation. In April 2016, amendments were issued to clarify the identification of performance obligations and the licensing implementation guidance in the initial standard. Amendments were issued in May 2016 related to its guidance on assessing collectability, presentation of sales tax, noncash consideration, and completed contracts and contract modification at transition, which reduce the potential for diversity in practice, and the cost and complexity of application at transition and on an ongoing basis. The Company has been evaluating the effects of the new guidance and has not yet selected a transition method nor has it determined the potential effects of adoption on its consolidated financial statements.

In April 2015, the FASB issued new guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The guidance provides a basis for evaluating whether a cloud computing arrangement includes a software license or whether the arrangement should be accounted for as a service contract. The guidance is effective for annual and interim reporting periods beginning after December 15, 2015. The newly issued guidance also strikes from previous authoritative guidance, the use by analogy to the accounting for capital leases, which the Company applied in the accounting for certain of its technology license agreements. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In July 2015, the FASB issued an amendment to its guidance regarding the subsequent measurement of inventory. Currently, inventory is measured at the lower of cost or market. Market could be replacement cost, net realizable value or net realizable value less an approximately normal profit margin. Under this amended guidance, inventory is to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This amendment applies to inventories for which cost is determined by methods other than last-in first-out and the retail inventory method. This standard is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In January 2016, the FASB issued new guidance which requires entities to measure all investments in equity securities at fair value with changes recognized through net income. This requirement does not apply to investments that qualify for the equity method of accounting, investments that result in consolidation of the investee, or investments for which the entity meets a practicability exception to fair value measurement. The new guidance also changes certain disclosure requirements for financial instruments. This standard is effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued an amendment to its guidance on the effects of derivative contract novations on existing hedge accounting relationships. The new guidance clarifies that a change in the counterparty to a designated hedging instrument, in and of itself, does not require the de-designation of that hedging relationship, provided that all other hedge accounting criteria continue to be met. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures surrounding lease arrangements. The standard is effective for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued an amendment to its guidance for investments that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. Under the amended guidance, the investor should apply the equity method prospectively from the date the investment qualifies for the equity method. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued new guidance which simplifies several aspects of the accounting for share-based payment award transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the probable initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for annual and interim reporting periods beginning after December 15, 2019. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22583-107794

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22580-107794

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.10-01.(b)(6))
-URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accounting Change
-URI http://asc.fasb.org/extlink&oid=6503790

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22499-107794

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
-URI http://asc.fasb.org/extlink&oid=6523989

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305

+ Details

Investments

6 Months Ended

Aug. 01, 2015

Investments

Note 3. Investments

The following tables summarize the Company’s investments (in thousands):


	August 1, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	1,024,112	$	1,643	$	(1,557	)	$	1,024,198
U.S. government and agency debt		229,731		176		(19	)		229,888
Asset backed securities		101,216		99		(12	)		101,303
Foreign government and agency debt		16,945		7		(10	)		16,942
Municipal debt securities		37,780		38		(32	)		37,786

Total short-term investments		1,409,784		1,963		(1,630	)		1,410,117
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,377	)		10,123

Total long-term investments		12,500		—		(2,377	)		10,123

Total investments	$	1,422,284	$	1,963	$	(4,007	)	$	1,420,240


	January 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	983,008	$	3,872	$	(563	)	$	986,317
U.S. government and agency debt		178,898		265		(7	)		179,156
Asset backed securities		91,432		108		(9	)		91,531
Foreign government and agency debt		28,051		61		(2	)		28,110
Municipal debt securities		33,421		47		(4	)		33,464

Total short-term investments		1,314,810		4,353		(585	)		1,318,578
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,274	)		10,226

Total long-term investments		12,500		—		(2,274	)		10,226

Total investments	$	1,327,310	$	4,353	$	(2,859	)	$	1,328,804

As of August 1, 2015, the Company’s investment portfolio included auction rate securities with an aggregate par value of $12.5 million classified as long-term investments. Although these securities have continued to pay interest, there is currently limited trading volume in the securities. The Company uses a discounted cash flow model to estimate the fair value of the auction rate securities based on estimated timing and amount of future interest and principal payments. In developing the discounted cash flow model, the Company considers the credit quality and liquidity of the underlying securities and related issuer, the collateralization of underlying security investments and other considerations. The fair value of these auction rate securities as of August 1, 2015 was $2.4 million less than their par value. Based on the Company’s balance of approximately $2.3 billion in cash, cash equivalents and short-term investments, and the fact that the Company continues to generate positive cash flow from operations on a quarterly basis, the Company does not anticipate having to sell these securities below par value and does not have the intent to sell these auction rate securities until recovery. Since the Company considers the impairment to be temporary, the Company recorded the unrealized loss to accumulated other comprehensive loss, a component of shareholders’ equity.

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands):


	Three Months Ended					Six Months Ended
	August 1, 2015			August 2, 2014		August 1, 2015			August 2, 2014
Gross realized gains	$	255		$	480	$	698		$	952
Gross realized losses		(230	)		—		(337	)		(25	)

Total net realized gains	$	25		$	480	$	361		$	927

The contractual maturities of available-for-sale securities are presented in the following tables (in thousands):


	August 1, 2015				January 31, 2015
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	332,385	$	332,406	$	361,108	$	361,396
Due between one and five years		1,068,461		1,068,779		950,702		954,151
Due over five years		21,438		19,055		15,500		13,257

	$	1,422,284	$	1,420,240	$	1,327,310	$	1,328,804

For individual securities that have been in a continuous unrealized loss position, the fair value and gross unrealized loss for these securities aggregated by investment category and length of time in an unrealized position are presented in the following tables (in thousands):


	August 1, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	490,575	$	(1,539	)	$	6,053	$	(18	)	$	496,628	$	(1,557	)
U.S. government and agency debt		64,067		(19	)		—		—			64,067		(19	)
Asset backed securities		30,602		(12	)		—		—			30,602		(12	)
Foreign government and agency debt		13,938		(10	)		—		—			13,938		(10	)
Municipal debt securities		10,532		(32	)		—		—			10,532		(32	)
Auction rate securities		—		—			10,123		(2,377	)		10,123		(2,377	)

Total securities	$	609,714	$	(1,612	)	$	16,176	$	(2,395	)	$	625,890	$	(4,007	)


	January 31, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	243,699	$	(558	)	$	2,005	$	(5	)	$	245,704	$	(563	)
U.S. government and agency debt		32,165		(7	)		—		—			32,165		(7	)
Asset backed securities		25,053		(9	)		—		—			25,053		(9	)
Foreign government and agency debt		2,999		(2	)		—		—			2,999		(2	)
Municipal debt securities		2,845		(4	)		—		—			2,845		(4	)
Auction rate securities		—		—			10,226		(2,274	)		10,226		(2,274	)

Total securities	$	306,761	$	(580	)	$	12,231	$	(2,279	)	$	318,992	$	(2,859	)

Supplemental Financial Information

6 Months Ended

Aug. 01, 2015

Supplemental Financial Information

Note 4. Supplemental Financial Information (in thousands)

Consolidated Balance Sheets


	August 1, 2015		January 31, 2015
Inventories:
Work-in-process	$	198,158	$	183,869
Finished goods		128,945		124,293

Total inventories	$	327,103	$	308,162


	August 1, 2015			January 31, 2015
Property and equipment, net:
Machinery and equipment	$	623,191		$	601,961
Buildings		144,320			144,320
Computer software		102,801			99,312
Land		53,373			53,373
Building improvements		49,902			49,753
Leasehold improvements		50,350			51,434
Furniture and fixtures		27,531			27,883
Construction in progress		4,680			6,167

		1,056,148			1,034,203
Less: Accumulated depreciation and amortization		(733,886	)		(693,564	)

Total property and equipment, net	$	322,262		$	340,639



	August 1, 2015		January 31, 2015
Other non-current assets:
Technology and other licenses	$	48,518	$	61,217
Deferred tax assets		19,288		22,273
Investments in privately-held companies		8,556		9,267
Prepaid land use rights		13,277		13,432
Deposits		7,649		7,903
Other		13,169		14,747

Total other non-current assets	$	110,457	$	128,839


	August 1, 2015		January 31, 2015
Accrued liabilities:
Accrued rebates	$	35,826	$	39,105
Accrued royalties		19,130		24,680
Accrued share repurchases		19,672		—
Technology license obligations		10,802		14,428
Accrued legal expense		5,460		8,327
Accrued litigation		11,238		1,700
Other		58,841		43,148

Total accrued liabilities	$	160,969	$	131,388

Accrued share repurchases represent amounts not yet paid by the Company for repurchases of its common shares made in the final three days of the fiscal quarter. The repurchased shares are retired immediately after the repurchases are completed.



	August 1, 2015		January 31, 2015
Other non-current liabilities:
Technology license obligations	$	12,767	$	16,468
Long-term accrued employee compensation		6,323		4,610
Other		8,347		11,115

Other non-current liabilities	$	27,437	$	32,193

Accumulated other comprehensive income (loss)

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands):


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at January 31, 2015	$	3,768		$	(2,274	)	$	(1,186	)	$	308
Other comprehensive income (loss) before reclassifications		(2,865	)		(103	)		1,166			(1,802	)
Amounts reclassified from accumulated other comprehensive income (loss)		(453	)		—			669			216

Other comprehensive income (loss), net of tax		(3,318	)		(103	)		1,835			(1,586	)

Balance at August 1, 2015	$	450		$	(2,377	)	$	649		$	(1,278	)


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at February 1, 2014	$	2,534		$	(2,871	)	$	934		$	597
Other comprehensive income before reclassifications		1,012			143			734			1,889
Amounts reclassified from accumulated other comprehensive income (loss)		(855	)		—			(1,004	)		(1,859	)

Other comprehensive income (loss), net of tax		157			143			(270	)		30

Balance at August 2, 2014	$	2,691		$	(2,728	)	$	664		$	627

The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands):


	Three Months Ended				Six Months Ended
Affected Line Item in the Statement of Operations	August 1, 2015		August 2, 2014		August 1, 2015			August 2, 2014
Interest and other income, net:
Available-for-sale securities:
Marketable securities	$	121	$	435	$	453		$	855
Operating cost and expenses:
Cash flow hedges:
Research and development		251		200		(613	)		921
Selling and marketing		4		19		(63	)		81
General and administrative		20		—		7			2

Total	$	396	$	654	$	(216	)	$	1,859

Consolidated Statements of Operations


	Three Months Ended						Six Months Ended
	August 1, 2015			August 2, 2014			August 1, 2015			August 2, 2014
Interest and other income, net:
Interest income	$	3,971		$	2,315		$	8,048		$	4,924
Net realized gain on investments		25			480			361			927
Currency translation gain (loss)		3,494			339			3,901			(686	)
Other income (expense)		(508	)		9,438			59			9,657
Interest expense		(192	)		(309	)		(412	)		(634	)

	$	6,790		$	12,263		$	11,957		$	14,188

Net income (loss) per share

The Company reports both basic net income (loss) per share, which is based on the weighted average number of common shares outstanding during the period, and diluted net income (loss) per share, which is based on the weighted average number of common shares outstanding and potentially dilutive common shares outstanding during the period. The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts):


	Three Months Ended					Six Months Ended
	August 1, 2015			August 2, 2014		August 1, 2015			August 2, 2014
Numerator:
Net income (loss)	$	(771,940	)	$	138,870	$	(757,850	)	$	238,349

Denominator:
Weighted average shares — basic		516,368			511,821		516,298			508,463
Effect of dilutive securities:
Share-based awards		—			8,448		—			12,047

Weighted average shares — diluted		516,368			520,269		516,298			520,510

Net income (loss) per share:
Basic	$	(1.49	)	$	0.27	$	(1.47	)	$	0.47
Diluted	$	(1.49	)	$	0.27	$	(1.47	)	$	0.46

Potential dilutive securities include dilutive common shares from share-based awards attributable to the assumed exercise of stock options, restricted stock units and employee stock purchase plan shares using the treasury stock method. Under the treasury stock method, potential common shares outstanding are not included in the computation of diluted net income per share, if their effect is anti-dilutive.

Anti-dilutive potential shares are presented in the following table (in thousands):

Three Months Ended

Six Months Ended

August 1,
2015

August 2,
2014

August 1,
2015

August 2,
2014

Weighted average shares outstanding:

Share-based awards

57,437

26,132

57,519

24,341

Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for the three and six months ended August 1, 2015 due to the net loss reported in those periods. Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for all other periods reported above because either their exercise price exceeded the average market price during the period or the share-based awards were determined to be anti-dilutive based on applying the treasury stock method.

Derivative Financial Instruments

6 Months Ended

Aug. 01, 2015

Derivative Financial Instruments

Note 5. Derivative Financial Instruments

The Company manages some of its foreign currency exchange rate risk through the purchase of foreign currency exchange contracts that hedge against the short-term effect of currency fluctuations. The Company’s policy is to enter into foreign currency forward contracts with maturities less than 12 months that mitigate the effect of rate fluctuations on certain local currency denominated operating expenses. All derivative instruments are recorded at fair value in either prepaid expenses and other current assets or accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. The Company uses quoted prices to value its derivative instruments.

The notional amounts of outstanding forward contracts were as follows (in thousands):


	Buy Contracts
	August 1, 2015		January 31, 2015
Israeli shekel	$	18,749	$	51,326

Cash Flow Hedges. The Company designates and documents its foreign currency forward exchange contracts as cash flow hedges for certain operating expenses. The Company evaluates and calculates the effectiveness of each hedge at least quarterly. The effective change is recorded in accumulated other comprehensive income and is subsequently reclassified to operating expense when the hedged expense is recognized. Ineffectiveness is recorded in interest and other income, net.

Other Foreign Currency Forward Contracts. The Company enters into foreign currency forward exchange contracts to hedge certain assets and liabilities denominated in various foreign currencies that it does not designate as hedges for accounting purposes. The maturities of these contracts are generally less than 12 months. Gains or losses arising from the remeasurement of these contracts to fair value each period are recorded in interest and other income, net.

The fair value of foreign currency exchange contracts was not significant as of any period presented.

The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands):


		Amount of Gains (Losses) in Statement of Operations
		Three Months Ended					Six Months Ended
	Location of Gains (Losses) in Statement of Operations	August 1, 2015		August 2, 2014			August 1, 2015			August 2, 2014
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	415	$	311		$	(576	)	$	909
	Selling and marketing		6		30			(71	)		82
	General and administrative		32		(3	)		18			(1	)

		$	453	$	338		$	(629	)	$	990

The portion of gains (losses) excluded from the assessment of hedge effectiveness are included in interest and other income, net, and these amounts were not material in the three and six months ended August 1, 2015 and August 2, 2014. In addition, realized losses from forward contracts that are not designated as hedging instruments that are included in interest and other income, net, were not material in the three and six months ended August 1, 2015 and August 2, 2014. The Company also reports hedge ineffectiveness from derivative financial instruments in current earnings, which was not material in the three and six months ended August 1, 2015 and August 2, 2014. No cash flow hedges were terminated as a result of forecasted transactions that did not occur.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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-Paragraph 4B
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5708773-113959

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 16: http://www.xbrl.org/2003/role/presentationRef
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Reference 17: http://www.xbrl.org/2003/role/presentationRef
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Paragraph 1
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+ Details

Fair Value Measurements

6 Months Ended

Aug. 01, 2015

Fair Value Measurements

Note 6. Fair Value Measurements

Fair value is an exit price representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:

Level 1—Observable inputs that reflect quoted prices for identical assets or liabilities in active markets.

Level 2—Other inputs that are directly or indirectly observable in the marketplace.

Level 3—Unobservable inputs that are supported by little or no market activity.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

The Company’s Level 1 assets include institutional money-market funds that are classified as cash equivalents and marketable investments in U.S. government and agency debt, which are valued primarily using quoted market prices. The Company’s Level 2 assets include its marketable investments in time deposits, corporate debt securities, foreign government and agency debt, municipal debt securities and asset backed securities as the market inputs used to value these instruments consist of market yields, reported trades and broker/dealer quotes, which are corroborated with observable market data. In addition, forward contracts, and the severance pay fund are classified as Level 2 assets as the valuation inputs are based on quoted prices and market observable data of similar instruments. The Company’s investments in auction rate securities are classified as Level 3 assets because there are currently no active markets for the auction rate securities and consequently the Company is unable to obtain independent valuations from market sources. Therefore, the auction rate securities are valued using a discounted cash flow model. Some of the inputs to the discounted cash flow model are unobservable in the market. The Company’s Level 3 assets also include corporate equipment, which it acquired through an early buyout option under an operating lease (see “Note 8 – Restructuring and Other Related Charges”) since it is valued based on market prices of similar assets in a limited market. The total amount of assets measured using Level 3 valuation methodologies represented 0.2% of total assets as of August 1, 2015.

The tables below set forth, by level, the Company’s assets and liabilities that are measured at fair value on a recurring basis. The tables do not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands):


	August 1, 2015
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	14,819	$	—	$	—	$	14,819
Time deposits		—		204,358		—		204,358
Corporate debt securities		—		20,675		—		20,675
Short-term investments:
U.S. government and agency debt		229,888		—		—		229,888
Corporate debt securities		—		1,024,198		—		1,024,198
Asset backed securities		—		101,303		—		101,303
Foreign government and agency debt		—		16,942		—		16,942
Municipal debt securities		—		37,786		—		37,786
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		624		—		624
Long-term investments:
Auction rate securities		—		—		10,123		10,123
Other non-current assets:
Severance pay fund		—		1,925		—		1,925

Total assets	$	244,707	$	1,407,811	$	10,123	$	1,662,641


	January 31, 2015
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	111,286	$	—	$	—	$	111,286
Time deposits		—		213,012		—		213,012
Corporate debt securities		—		21,999		—		21,999
Short-term investments:
U.S. government and agency debt		179,156		—		—		179,156
Corporate debt securities		—		986,317		—		986,317
Asset backed securities		—		91,531		—		91,531
Foreign government and agency debt		—		28,110		—		28,110
Municipal debt securities		—		33,464		—		33,464
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		124		—		124
Long-term investments:
Auction rate securities		—		—		10,226		10,226
Other non-current assets:
Severance pay fund		—		1,758		—		1,758

Total assets	$	290,442	$	1,376,315	$	10,226	$	1,676,983

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	1,379	$	—	$	1,379

Assets measured and recorded at fair value on a non-recurring basis include corporate equipment classified as held for sale, which had a fair value of $9.3 million as of August 1, 2015 (see “Note 8 – Restructuring and Other Related Charges.”

The following table summarizes the change in fair value for Level 3 assets (in thousands):


	Six Months Ended
	August 1, 2015			August 2, 2014
Beginning balance	$	10,226		$	16,279
Sales and redemptions		—			(3,000	)
Unrealized losses included in accumulated other comprehensive income		(103	)		143

Ending balance	$	10,123		$	13,422

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Acquired Intangible Assets, Net

6 Months Ended

Aug. 01, 2015

Acquired Intangible Assets, Net

Note 7. Acquired Intangible Assets, Net

The carrying amounts of acquired intangible assets, net, are as follows (in thousands):


		August 1, 2015							January 31, 2015
	Range of Useful Lives	Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts
Purchased and core technology	4 - 8 years	$	36,348	$	(19,303	)	$	17,045	$	36,348	$	(16,107	)	$	20,241
Trade names	5 years		1,300		(958	)		342		1,300		(828	)		472
Customer intangibles	5 - 7 years		28,600		(21,395	)		7,205		28,600		(18,615	)		9,985

Total intangible assets, net		$	66,248	$	(41,656	)	$	24,592	$	66,248	$	(35,550	)	$	30,698

Based on the identified intangible assets recorded at August 1, 2015, the future amortization expense for the next five fiscal years is as follows (in thousands):


Fiscal Year
Remainder of fiscal 2016	$	6,106
2017		11,027
2018		5,599
2019		1,860
2020 and thereafter		—

	$	24,592

Restructuring and Other Related Charges

6 Months Ended

Aug. 01, 2015

Restructuring and Other Related Charges

Note 8. Restructuring and Other Related Charges

The following table provides a summary of restructuring and other related charges as presented in the unaudited condensed consolidated statements of operations (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Restructuring and other related charges	$	13,000	$	735	$	13,592	$	5,823
Write-off of acquired intangible assets		—		—		—		3,386

	$	13,000	$	735	$	13,592	$	9,209

The following table presents details of charges recorded by the Company related to the restructuring actions described below (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Severance and related costs	$	11,705	$	418	$	11,705	$	5,035
Facilities and related costs		206		254		225		698
Other exit-related costs		189		63		189		73

		12,100		735		12,119		5,806
Impairment and write-off of assets:
Equipment		900		—		1,473		17
Acquired intangible asset		—		—		—		3,386

	$	13,000	$	735	$	13,592	$	9,209

In May 2015, the Company decided to further reduce its research and development operations in Israel and close certain other design centers, primarily located in Europe and the U.S. in connection with its ongoing effort to streamline its business. As a result, the Company recorded a $11.9 million charge that included severance related to the termination of 313 employees and the lease obligation related to a facility that the Company vacated in July 2015. Although the majority of the affected employees departed by the end of the second quarter of fiscal 2016, certain employees remained through the end of calendar 2015 to facilitate the transfer of ongoing operations to other major sites. Before the end of fiscal 2016, substantially all of the activities associated with these actions were completed and all affected employees had departed.

In March 2015, the Company exercised the early buyout option under an operating lease for corporate equipment that it had planned to sell as part of a cost reduction action. The Company actively sought a buyer and classified the equipment as held for sale within prepaid and current assets on the unaudited condensed consolidated balance sheet. It also ceased depreciation on these assets and measured the carrying value at the lower of net book value or fair value (less cost to sell). Accordingly, since the fair value of the equipment was lower than its net book value as of August 1, 2015, the Company recorded an impairment charge of $0.9 million resulting in a carrying value of $9.3 million. This charge is included in the total restructuring charges for the three and six months ended August 1, 2015. Subsequently in October 2015, the Company sold the corporate equipment for net proceeds of $9.3 million, which approximated the carrying value and resulted in no gain or loss recognition in the third quarter of fiscal 2016 upon the sale of the asset.

During the three and six months ended August 1, 2015, the Company also continued to make payments and incur ongoing operating expenses related to vacated facilities under previous restructure actions.

In September 2015, the Company announced a significant restructuring of its mobile platform business in order to focus the mobile product line on more profitable opportunities and align its expenses with corporate targets. The Company began implementing actions to significantly downsize the mobile platform organization to refocus its technology to other emerging opportunities, but it will continue its commitment to wireless connectivity such as WiFi and other wireless standards. Major activities associated with these actions were expected to take place in the third quarter of fiscal 2016 through the end of the first quarter of fiscal 2017. The Company initially announced it expected to incur a total charge of $100 million to $130 million for severance and employee-related costs, facilities and asset impairment charges, and the write down of mobile-related inventory.

The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands):


	Severance and Related Costs			Facilities and Related Costs			Other Exit-Related Costs			Total
Balance at January 31, 2015	$	—		$	1,339		$	3,230		$	4,569
Restructuring charges		11,705			225			189			12,119
Net cash payments		(2,392	)		(476	)		(3,419	)		(6,287	)
Exchange rate adjustment		(104	)		(67	)		—			(171	)

Balance at August 1, 2015	$	9,209		$	1,021		$	—		$	10,230

During the six months ended August 1, 2015, the Company paid severance and related costs to 218 employees who departed in the second quarter of fiscal 2016 as part of the recent actions to streamline its business. The remaining severance balance at August 1, 2015 was paid by the end of fiscal 2016. The balance at August 1, 2015 for facility and related costs includes remaining payments under lease obligations related to vacated space that are expected to be paid through fiscal 2018.

Income Tax

6 Months Ended

Aug. 01, 2015

Income Tax

Note 9. Income Tax

The income tax expense for the three months ended August 1, 2015 was primarily due to current income tax liability of $15.2 million and a $6.7 million provision to record a valuation allowance against certain deferred tax assets in a non-U.S. jurisdiction. These tax expenses for the three months ended August 1, 2015 were partially offset by a tax benefit of $11.7 million from a net reduction in unrecognized tax benefits, which primarily arose from the expiration of statutes of limitation and the settlement of audits in non-U.S. jurisdictions, and true-up adjustments of $4.8 million, primarily related to the filing of tax returns. The income tax expense for the six months ended August 1, 2015 was primarily due to current income tax liability of $19.5 million, a $6.7 million provision to record a valuation allowance against certain deferred tax assets in a non-U.S. jurisdiction and an additional provision of $3.1 million related to a $15.4 million payment to the Company’s former Chief Executive Officer (see “Note 13 – Related Party Transaction”). These tax expenses for the six months ended August 1, 2015 were partially offset by tax benefits of $14.8 million from a net reduction in unrecognized tax benefits, which primarily arose from the expiration of statutes of limitation and the settlement of tax audits in non-U.S. jurisdictions, and true-up adjustments of $4.8 million, primarily related to the filing of tax returns.

The income tax benefit for the three months ended August 2, 2014 included the current income tax liability of $4.9 million, which was more than offset by tax benefits of $7.3 million from a net reduction in unrecognized tax benefits and $3.7 million from an increase in the net deferred tax assets because of a tax rate change in Singapore. The Company finalized its agreement with the Singapore Economic Development Board for the remaining portion of pre-tax income subject to the Development and Expansion Incentive, which was extended through June 2019. The net reduction in unrecognized tax benefits primarily arose from the release of the expiration of statutes of limitation in non-U.S. jurisdictions. The income tax benefit for the six months ended August 2, 2014 included the current income tax liability of $10.6 million which was offset by a net reduction in unrecognized tax benefits of $9.8 million and $11.5 million from an increase in the net deferred tax assets because of the tax rate change in Singapore. The net reduction in unrecognized tax benefits arose from the release of $13.2 million due to the expiration of statutes of limitation, which was reduced by a $3.4 million increase in current unrecognized tax benefit estimates in various non-U.S. jurisdictions.

It is reasonably possible that the amount of unrecognized tax benefits could increase or decrease significantly due to changes in tax law in various jurisdictions, new tax audits and changes in the U.S. dollar as compared to foreign currencies within the next 12 months. Excluding these factors, uncertain tax positions may decrease by as much as $18.7 million from the lapse of statutes of limitation in various jurisdictions during the next 12 months. Government tax authorities from several non-U.S. jurisdictions are also examining returns. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to its tax audits and that any settlement will not have a material effect on its results at this time.

The Company operates under tax incentives in certain countries, which may be extended if certain additional requirements are satisfied. The tax incentives are conditional upon meeting certain employment and investment thresholds. The impact of these tax incentives decreased foreign taxes by $1.6 million and $4.9 million for the three and six months ended August 1, 2015, respectively, and $7.1 million and $10.4 million for the three and six months ended August 2, 2014, respectively. The benefit of the tax incentives on net loss per share was less than $0.01 per share for the three months ended August 1, 2015 and $0.01 per share for the six months ended August 1, 2015, compared to a benefit on net income of $0.01 per share for the three months ended August 2, 2014 and $0.02 per share for the six months ended August 2, 2014.

The Company’s principal source of liquidity as of August 1, 2015 consisted of approximately $2.3 billion of cash, cash equivalents and short-term investments, of which approximately $800 million was held by foreign subsidiaries (outside Bermuda). Approximately $550 million of this amount held by foreign subsidiaries is related to undistributed earnings, most of which have been indefinitely reinvested outside of Bermuda. These funds are primarily held in China, Israel, the United States and Switzerland. The Company plans to use such amounts to fund various activities outside of Bermuda including working capital requirements, capital expenditures for expansion, funding of future acquisitions or other financing activities. If such funds were needed by the parent company in Bermuda or if the amounts were otherwise no longer considered indefinitely reinvested, the Company would incur a tax expense of approximately $160 million.

Commitments and Contingencies

6 Months Ended

Aug. 01, 2015

Commitments and Contingencies

Note 10. Commitments and Contingencies

Purchase Commitments

Under the Company’s manufacturing relationships with its foundry partners, cancellation of all outstanding purchase orders are allowed, but requires payment of all costs and expenses incurred through the date of cancellation. As of August 1, 2015, these foundries had incurred approximately $215.2 million of manufacturing costs and expenses relating to the Company’s outstanding purchase orders.

Intellectual Property Indemnification

The Company has agreed to indemnify certain customers for claims made against the Company’s products, where such claims allege infringement of third party intellectual property rights, including, but not limited to, patents, registered trademarks, and/or copyrights. Under the aforementioned indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim as well as the attorneys’ fees and costs. The Company’s indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. Generally, there are limits on and exceptions to the Company’s potential liability for indemnification. Although historically the Company has not made significant payments under these indemnification obligations, the Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant.

Contingencies

The Company and certain of its subsidiaries are currently parties to various legal proceedings, including those noted in this section. The legal proceedings and claims described below could result in substantial costs and could divert the attention and resources of the Company’s management. The Company is also engaged in other legal proceedings and claims not described below, which arise in the ordinary course of its business. Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling in litigation could require the Company to pay damages, one-time license fees or ongoing royalty payments, and could prevent the Company from manufacturing or selling some of its products or limit or restrict the type of work that employees involved in such litigation may perform for the Company, any of which could adversely affect financial results in future periods. The Company believes that its products do not infringe valid and enforceable claims and it will continue to vigorously defend against the allegations in these matters. However, there can be no assurance that these matters will be resolved in a manner that is not adverse to the Company’s business, financial condition, results of operations or cash flows.

As of August 1, 2015, the Company has an accrued litigation balance of $744.8 million related to certain legal proceedings described below. Unless otherwise stated, the Company is currently unable to predict the final outcome of these lawsuits and therefore cannot determine the likelihood of loss or estimate a range of possible loss.

Carnegie Mellon University Litigation. On March 6, 2009, CMU filed a complaint in the U.S. District Court for the Western District of Pennsylvania (“W.D. of Pennsylvania”). CMU has asserted U.S. Patent Nos. 6,201,839 and 6,438,180 (collectively, the “CMU patents in suit”), which relate to read-channel integrated circuit devices and the hard disk drive (“HDD”) incorporating such devices. A jury trial began on November 26, 2012. On December 26, 2012, a jury delivered a verdict that found the CMU patents in suit were literally and willfully infringed and valid, and awarded past damages in the amount of $1.17 billion. Based on post-trial motions and decisions, the W.D. of Pennsylvania calculated the damages including enhancement to total approximately $1.54 billion, and held that, under its decision, CMU is entitled to post judgment interest and an ongoing royalty. On May 7, 2014, the W.D. of Pennsylvania entered final judgment, from which the Company filed a notice of appeal on May 14, 2014. On August 4, 2015, the W.D. of Pennsylvania in a three-judge panel issued an opinion affirming in part, reversing in part, and vacating and remanding in part. On February 16, 2016, the Company and CMU entered into a Settlement Agreement and Patent License pursuant to which the Company has agreed to pay an aggregate of $750 million, without any ongoing royalty payments, to CMU and the parties have agreed to mutually acceptable release, license and covenant not to sue provisions. Please see “Note 14 – Subsequent Events” for additional information on the effect of the settlement in the Company’s unaudited condensed consolidated financial statements for fiscal 2016.The Company expects the action to be finally dismissed in the third quarter of fiscal 2017, approximately 6 months after payment of the full amount of the settlement payment. In connection with the settlement, the primary supersedeas bond that the Company entered into in connection with this litigation was reduced to $439 million and the secondary bond, which is secured, was adjusted to $311 million. All of the Company’s obligations under both bonds were discharged pursuant to an order releasing supersedeas bonds on April 21, 2016. Any bond specific indemnity agreement will be terminated and released upon final dismissal of the action.

USEI Litigation. On October 9, 2009, U.S. Ethernet Innovations, LLC (“USEI”) filed a complaint in the U.S. District Court for the Eastern District of Texas (“E.D. of Texas”), in which USEI accused a number of system manufacturers, including the Company’s customers, of patent infringement (the “USEI litigation”). Specifically, USEI asserted that these customers infringe U.S. Patent Nos. 5,307,459, 5,434,872, 5,732,094 and 5,299,313, which relate to Ethernet technologies. The complaint seeks unspecified damages and an injunction.

On May 4, 2010, MSI filed a motion to intervene in the USEI litigation, which was granted on May 19, 2010. On July 13, 2010, the E.D. of Texas issued an order granting the defendants’ motion to transfer the action to the U.S. District Court for the Northern District of California (“N.D. of California”); the case was formally transferred on August 23, 2010. On September 14, 2011, USEI withdrew its allegations against MSI for the ‘459 patent. The N.D. of California issued a first claim construction ruling on January 31, 2012 and a supplemental claim construction ruling on August 29, 2012. On August 16, 2013, the N.D. of California granted defendants’ summary judgment motion to preclude the plaintiff from recovering certain pre-suit damages. On November 7, 2014, on summary judgment, the N.D. of California found that all the patents-in-suit were either invalid or not infringed. On December 1, 2014, the N.D. of California entered a judgment in favor of defendants and awarded defendants’ costs. On December 29, 2014, USEI filed a motion to alter or amend the N.D. of California’s summary judgment order, which the N.D. of California denied on March 31, 2015. On April 24, 2015, USEI filed its notice of appeal. On April 25, 2016, the Federal Circuit affirmed the N.D. of California’s judgment in favor of MSI. On June 29, 2016, the Federal Circuit denied USEI’s petition for rehearing.

Azure Networks Litigation. On March 22, 2011, Azure Networks, LLC (“Azure”) and Tri-County Excelsior Foundation filed suit in the E.D. of Texas against MSI and eight other companies. The Complaint asserts U.S. Patent No. 7,756,129 against MSI’s Bluetooth products. MSI filed its answer and counterclaims on July 20, 2011. On November 2, 2012, MSI and the other defendants filed a motion for summary judgment of invalidity, which was denied. A claim construction hearing was held on December 20, 2012. On January 15, 2013, the magistrate judge issued a claim construction ruling. On May 20, 2013, the E.D. of Texas issued an order denying plaintiff’s motion for reconsideration and adopted the magistrate judge’s claim construction ruling. On May 30, 2013, the E.D. of Texas entered a judgment of non-infringement. On June 24, 2013, Azure appealed. On November 6, 2014, the Federal Circuit issued an order vacating the judgment of non-infringement and remanding for further proceedings. MSI filed a petition for writ of certiorari to the United States Supreme Court on February 4, 2015. On February 10, 2015, the E.D. of Texas stayed all proceedings pending the Supreme Court’s ruling on the Company’s petition. On April 20, 2015, the United States Supreme Court granted MSI’s petition, vacating the Federal Circuit’s judgment and remanding the case for further consideration. The case was dismissed with prejudice on October 14, 2015 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

On January 13, 2015, Azure filed a second suit against MSI in the E.D. of Texas, alleging infringement of U.S. Patent Nos. 8,582,570; 8,582,571; 8,588,196; 8,588,231; 8,589,599; 8,675,590; 8,683,092; 8,700,815; 8,732,347; and 8,732,361, purportedly related to certain Wi-Fi and near field communication (“NFC”) technologies. The complaint seeks unspecified damages. On April 6, 2015, MSI filed an amended answer and counterclaims. The case was dismissed with prejudice on January 4, 2016 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

France Telecom Litigation. On June 26, 2012, France Telecom S.A. filed a complaint against MSI in the U.S. District Court for the Southern District of New York. The complaint asserts U.S. Patent No. 5,446,747 against MSI’s communications processors and thin modems. The complaint sought unspecified damages as well as injunctive relief. MSI answered the complaint on July 18, 2012 and August 1, 2012. On July 30, 2012, MSI filed a motion to transfer the lawsuit to the N.D. of California. On September 17, 2012, the Court granted MSI’s motion and transferred the case to the N.D. of California. A claim construction hearing was held on December 13, 2013. On April 14, 2014, the Court denied MSI’s motion for summary judgment of invalidity, and granted MSI’s summary judgment motion concerning certain damages preclusion. A jury trial began on September 17, 2014. On September 30, 2014, a jury delivered a verdict that found the patent in suit was literally, but not willfully, infringed and valid, and awarded damages. The award did not have a significant impact on the Company’s unaudited condensed consolidated financial statements. A hearing for post-trial motions and non-jury issues took place on January 14, 2015. On March 2, 2015, the N.D. of California issued an order on post-trial briefs finding no direct infringement by Marvell as a matter of law and entered judgment in favor of Marvell. On March 30, 2015, France Telecom filed a notice of appeal. On April 10, 2015, MSI filed a notice of cross appeal. On July 15, 2015, the Federal Circuit granted the parties’ joint stipulation to dismiss both parties’ appeals.

Vantage Point Technology Patent Litigation. On November 21, 2013, Vantage Point Technology, Inc. (“VPT”) filed suit against a third-party defendant in the E.D. of Texas for patent infringement relating to processor technology. On February 3, 2014, VPT filed an amended complaint against the third party and added MSI as an additional defendant. The complaint sought unspecified damages. On December 8, 2014, the case was transferred to the N.D. of California. The case was dismissed with prejudice in March, 2015 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

Bandspeed Litigation. On May 9, 2014, Bandspeed, Inc. filed suit against MSI in the U.S. District Court for the Western District of Texas, alleging infringement of U.S. Patent Nos. 7,027,418; 7,570,614; 7,477,624; 7,903,608; and 8,542,643, purportedly related to certain Bluetooth technology. The complaint sought unspecified damages. On February 13, 2015, Bandspeed amended its complaint and added allegations of infringement of U.S. Patent No. 8,873,500. On April 29, 2015, the parties filed a joint motion to dismiss the case with prejudice. The case was dismissed with prejudice on May 7, 2015 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

NXP Litigation. On January 22, 2015, NXP Semiconductors N.V. filed suit against MSI in the N.D. of California, alleging infringement of U.S. Patent Nos. 5,939,791; 7,039,133; 8,185,050; and 8,203,432, purportedly related to certain NFC technology. The complaint sought unspecified damages. MSI filed its response and counterclaims on February 26, 2015. Marvell International Limited (“MIL”) also filed counterclaims against NXP Semiconductors U.S.A. (“NXP USA”), alleging infringement of U.S. Patent Nos. 7,047,393; 7,555,065; and 7,302,600. On February 2, 2015, MIL filed suit against NXP USA in the U.S. District Court for the Central District of California, alleging patent infringement of U.S. Patent Nos. 8,171,309; 7,957,777; 7,454,634; and 6,903,448, related to certain NFC and automotive technologies. On April 15, 2015, the parties filed stipulations to dismiss without prejudice their claims and counterclaims in both cases.

Paone Litigation. On February 6, 2015, Luciano F. Paone filed suit against MSI in the U.S. District Court for the Eastern District of New York, alleging infringement of U.S. Patent No. 6,259,789, purportedly related to certain encryption technology. The complaint seeks unspecified damages. MSI filed its response on May 22, 2015. The case was dismissed with prejudice on December 31, 2015 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

Innovatio Litigation. On March 16, 2015, Innovatio IP Ventures, LLC filed suit against MSI in the U.S. District Court for the Northern District of Illinois, alleging infringement of U.S. Patent Nos. 6,697,415; 5,844,893; 5,740,366; 7,916,747; 6,665,536; 7,013,138; 7,107,052; 5,546,397; 7,710,907; 7,710,935; 6,714,559; 7,457,646; and 6,374,311, purportedly related to certain wireless technology. The complaint seeks unspecified damages.

Visual Memory Litigation. On May 8, 2015, Visual Memory LLC (“Visual Memory”) filed suit against MSI in the District of Delaware, alleging infringement of U.S. Patent Nos. 5,654,932 and 6,026,027, purportedly related to certain memory technology. The complaint seeks unspecified damages. The case was dismissed with prejudice on September 4, 2015 with no significant impact on the Company’s unaudited condensed consolidated financial statements.

Luna Litigation and Consolidated Cases. On September 11, 2015, Daniel Luna filed an action asserting putative class action claims on behalf of the Company’s shareholders in the United States District Court for the Southern District of New York (“S.D. of New York”). This action was consolidated with two additional, nearly identical complaints subsequently filed by Philip Limbacher and Jim Farno. The complaints asserted violations of federal securities laws based on allegations that the Company and certain of its officers and directors (Sehat Sutardja, Michael Rashkin, and Sukhi Nagesh) made, caused to be made, or failed to correct false and/or misleading statements in the Company’s press releases and public filings. The complaints request damages in unspecified amounts, costs and fees of bringing the action, and other unspecified relief.

On November 18, 2015, the S.D. of New York granted the Company’s motion to transfer the consolidated cases to the N.D. of California. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the consolidated cases related to the Saratoga litigation, discussed below. On February 8, 2016, the N.D. of California granted an unopposed motion to appoint Plumbers and Pipefitters National Pension Fund as Lead Plaintiff. On March 19, 2016, Lead Plaintiff filed a consolidated amended complaint. On April 29, 2016, Marvell and each of the individual defendants each filed motions to dismiss; Lead Plaintiff’s oppositions were filed on June 10, 2016; and defendants’ replies are due by July 15, 2016. The hearing on the motions to dismiss is set for July 29, 2016.

Saratoga Litigation. On October 16, 2015, Saratoga Advantage Trust Technology & Communications Portfolio (“Saratoga”) filed an action asserting shareholder derivative claims ostensibly on behalf of the Company in the Superior Court of the State of California, County of Santa Clara. The complaint names eight current or former officers and/or directors (Sehat Sutardja, Weili Dai, Juergen Gromer, Arturo Krueger, John Kassakian, Randhir Thakur, Michael Rashkin, and Sukhi Nagesh) as defendants and asserts various California state law causes of action based on allegations that the Company and the named officers and directors made, caused to be made, or failed to correct false and/or misleading statements in the Company’s press releases and public filings, leading to the filing of securities class actions that allegedly damaged the Company. The Company was named as a nominal defendant. The complaint requests damages and restitution in unspecified amounts, equitable and/or injunctive relief, costs and fees of bringing the action, and other unspecified relief.

On October 23, 2015, the Company removed the action to the N.D. of California. On December 21, 2015, the N.D. of California denied Saratoga’s motion to remand. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the action related to the consolidated Luna actions, discussed above. On January 22, 2016, the Company filed a motion to dismiss the complaint; on February 19, 2016, Saratoga filed an opposition; and on March 4, 2016, the Company filed a reply. On March 25, 2016, the N.D. of California held a hearing on the motion and took the matter under submission. To the Company’s knowledge, none of the individual defendants has yet been served.

Surety Bonds

On May 14, 2014, the Company filed a Notice of Appeal to appeal the final judgment issued by the W.D. of Pennsylvania in the CMU litigation. In order to stay the execution of the final judgment pending its appeal, the Company filed a supersedeas bond for $1.54 billion with the W.D. of Pennsylvania in the event the Company did not fully satisfy a final judgment as affirmed after the completion of all appellate proceedings. The bond was issued by a consortium of sureties authorized by the U.S. Treasury. In support of the bond, the Company entered into separate indemnity agreements with each of the sureties to indemnify the sureties from all costs and payments made under the bond. The indemnity agreements did not require collateral to be posted at the time of the issuance of the bond. Therefore no cash is considered restricted as of the date of this filing. However, the indemnity agreements provide that each of the sureties have the right to demand to be placed in funds or call for collateral under pre-defined events.

On November 14, 2014, the Company filed a second surety bond for $216 million and filed a commitment letter from the sureties to issue up to an additional $95 million in bonding under certain conditions. The second bond and commitment are secured by the Company’s campus located in Santa Clara, California, which has a carrying value of $136.2 million at August 1, 2015.

In connection with the settlement that was reached with CMU for a total $750 million in February 2016, the primary supersedeas bond that the Company entered into was reduced to $439 million and the secondary bond was adjusted to $311 million and both were discharged pursuant to an order releasing supersedeas bonds on April 21, 2016. The underlying indemnity agreements will terminate upon the final dismissal of the case in the third quarter of fiscal 2017. For additional information, see CMU litigation under “Contingencies” above.

Indemnities, Commitments and Guarantees

During its normal course of business, the Company has made certain indemnities, commitments and guarantees under which it may be required to make payments in relation to certain transactions. These indemnities may include intellectual property indemnities to the Company’s customers in connection with the sales of its products, indemnities for liabilities associated with the infringement of other parties’ technology based upon the Company’s products, indemnities for general commercial obligations, indemnities to various lessors in connection with facility leases for certain claims arising from such facility or lease, and indemnities to directors and officers of the Company to the maximum extent permitted under the laws of Bermuda. In addition, the Company has contractual commitments to various customers, which could require the Company to incur costs to repair an epidemic defect with respect to its products outside of the normal warranty period if such defect were to occur. The duration of these indemnities, commitments and guarantees varies, and in certain cases, is indefinite. Some of these indemnities, commitments and guarantees do not provide for any limitation of the maximum potential future payments that the Company could be obligated to make. In general, the Company does not record any liability for these indemnities, commitments and guarantees in the accompanying consolidated balance sheets as the amounts cannot be reasonably estimated and are not considered probable. The Company does, however, accrue for losses for any known contingent liability, including those that may arise from indemnification provisions, when future payment is probable.

Shareholders' Equity

6 Months Ended

Aug. 01, 2015

Shareholders' Equity

Note 11. Shareholders’ Equity

Stock Plans

Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except per share amounts):


	Time-Based Options					Market-Based Options					Total
	Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price
Balance at January 31, 2015		47,140		$	13.79		2,232		$	15.43		49,372		$	13.88
Granted		5,872		$	14.37		—		$	—		5,872		$	14.37
Exercised		(1,829	)	$	10.24		—		$	—		(1,829	)	$	10.24
Canceled/Forfeited		(3,718	)	$	16.80		(8	)	$	15.43		(3,726	)	$	16.80

Balance at August 1, 2015		47,465		$	13.77		2,224		$	15.43		49,689		$	13.84

Vested or expected to vest at August 1, 2015		44,264		$	13.77

Exercisable at August 1, 2015		24,586		$	14.44

For time-based stock options vested and expected to vest at August 1, 2015, the aggregate intrinsic value was $45.8 million and the weighted average remaining contractual term was 6.0 years. For time-based stock options exercisable at August 1, 2015, the aggregate intrinsic value was $30.6 million and the weighted average remaining contractual term was 4.2 years. The aggregate intrinsic value of stock options exercised during the three months ended August 1, 2015 and August 2, 2014 was $2.5 million and $4.2 million, respectively. The aggregate intrinsic value of stock options exercised during the six months ended August 1, 2015 and August 2, 2014 was $8.8 million and $13.6 million, respectively. There was no aggregate intrinsic value for market-based stock options at August 1, 2015 and the weighted average remaining contractual term of market-based stock options expected to reach the end of the vesting period at August 1, 2015 was 5.7 years. The Company’s closing stock price of $12.44 as reported on the NASDAQ Global Select Market for all in-the-money options as of July 31, 2015 was used to calculate the aggregate intrinsic value.

As of August 1, 2015, the unamortized compensation expense for time-based stock options was $57.0 million and market-based stock options were fully amortized in fiscal 2015. The unamortized compensation expense for time-based stock options will be amortized on a straight-line basis and is expected to be recognized over a weighted average period of 2.4 years.

Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices):


	Time-Based					Performance-Based					Market-Based					Total
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Balance at January 31, 2015		9,748		$	14.84		1,254		$	14.99							11,002		$	14.85
Granted		4,873		$	13.66		669		$	14.08		407		$	12.24		5,949		$	13.61
Vested		(4,601	)	$	15.30		(658	)	$	15.15		—		$	—		(5,259	)	$	15.28
Canceled/Forfeited		(409	)	$	14.06		(227	)	$	14.43		(54	)	$	12.24		(690	)	$	13.09

Balance at August 1, 2015		9,611		$	14.05		1,038		$	14.42		353		$	12.24		11,002		$	14.03

In April 2015, the Company granted performance-based equity awards to each of its executive officers, which are based on their achievement of certain performance goals for a new performance period beginning in fiscal 2016. These equity awards include restricted stock units which vest based on the achievement of certain financial goals (each a “Financial Performance RSU”), and performance awards for which a portion shall vest based on the achievement of individual strategic objectives (each a “Strategic Objective Award”) and a portion shall vest based on total shareholder return (each a “Total Shareholder Return Award”). These awards are reported in the above table as “Performance-Based,” except for the Total Shareholder Return Award which is reported as “Market-Based.” The Financial Performance RSUs will be earned based on the achievement of revenue and modified non-GAAP operating income that have been established at “threshold,” “target” and “maximum” levels and will vest on the first anniversary of the commencement date. The Strategic Objective Awards will vest on the first anniversary of the vest commencement date at the target level based on the achievement of individual strategic goals and, with respect to a portion of each Strategic Objective Award, the further achievement of either the revenue or modified non-GAAP operating income objective established for the Financial Performance RSU. The Total Shareholder Return Awards will vest on the second anniversary of the commencement date based on the Company’s stock price performance in comparison to the Philadelphia Semiconductor Sector Index. Share-based compensation for the Total Shareholder Return Award is measured using the Monte Carlo valuation method since the award is indexed to the price of the Company’s common stock as set forth under the terms of the award.

In connection with the performance-based equity awards granted in fiscal 2016 to each of the Company’s executive officers, a total of 33,616 shares vested on April 1, 2016 based on achieving certain individual strategic goals as evaluated by the Executive Compensation Committee of the Company’s Board of Directors. No shares vested for the achievement of financial performance goals since the financial performance criteria were below the threshold level. The amount of canceled shares reported in the table above includes the unvested shares that were not earned.

In connection with the performance-based equity awards granted in fiscal 2015 to each of the Company’s executive officers, a total of 478,001 shares vested on April 1, 2015 in connection with the first performance period completed at the end of fiscal 2015. Of this amount, an additional 107,954 shares are included as granted in the table above for the six months ended August 1, 2015 since each executive officer achieved greater than their target shares for one of the financial performance goals. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since performance objectives for each executive officer’s other financial and strategic performance goals were not fully achieved. During the first quarter of fiscal 2016, the Company determined the performance goals established for the second performance period to be completed at the end of fiscal 2016 would not be achieved and adjusted the related share-based compensation expense accordingly. As of August 1, 2015, the Company determined it was still not probable these performance goals would be achieved.

In connection with the performance-based restricted stock units granted in fiscal 2015 to certain members of senior management, final evaluation for each individual’s achievement of their performance was measured in the first quarter of fiscal 2016. As a result, a total of 360,723 shares vested on April 1, 2015 and are included in the above table. There was no material adjustment to share-based compensation expense related to these performance-based restricted stock units in fiscal 2016. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since certain performance achievements were not fully achieved.

The Company recognizes expense from performance-based equity awards when it becomes probable that the performance conditions will be met. Once it becomes probable that a performance-based award will vest, the Company recognizes share-based compensation expense equal to the number of shares expected to vest multiplied by the fair value of the award at the grant date, which is amortized using the accelerated method.

The aggregate intrinsic value of restricted stock units expected to vest as of August 1, 2015 was $126.1 million. The number of restricted stock units that are expected to vest is 10.1 million shares. As of August 1, 2015, unamortized compensation expense related to restricted stock units was $103.6 million. The unamortized compensation expense for restricted stock units will be amortized on a straight-line basis and is expected to be recognized over a weighted average period of 1.4 years.

Employee Stock Purchase Plan

During the three and six months ended August 1, 2015, a total of 3.2 million shares were issued at a weighted-average price of $11.88 per share under the 2000 Employee Stock Purchase Plan, as amended and restated (the “ESPP”). During the three and six months ended August 2, 2014, a total of 5.2 million shares were issued at a weighted-average price of $7.58 per share under the ESPP. As of August 1, 2015, there was $44.2 million of unrecognized compensation cost related to the ESPP.

Share Repurchase Program

The Company repurchased 14.6 million of its common shares for $193.2 million in cash during the three months ended August 1, 2015 and 16.0 million of its common shares for $215.3 million during the six months ended August 1, 2015. The Company had no repurchases of its common shares during the three and six months ended August 2, 2014. The repurchased shares are retired immediately after the repurchases are completed. The Company records all repurchases, as well as investment purchases and sales, based on their trade date. Approximately $19.7 million of repurchases for the six months ended August 2, 2015 were made in the final three days of the period and is included in accrued liabilities in the unaudited condensed consolidated balance sheet due to the standard three-day settlement period. As of August 1, 2015, a total of 237.9 million cumulative shares have been repurchased under the Company’s share repurchase program for a total $3.0 billion in cash and there was $228.2 million remaining available for future share repurchases.

Subsequent to the end of the quarter through August 24, 2015, the Company repurchased an additional 3.7 million of its common shares for $45.6 million at an average price per share of $12.39. The Company has made no subsequent share repurchases since August 24, 2015.

Dividends

The Company paid the following cash dividends (in thousands, except per share amounts):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Cash dividend per share	$	0.06	$	0.06	$	0.12	$	0.12

Total payment to shareholders	$	31,194	$	30,820	$	62,104	$	60,992

On September 28, 2015, the Company announced that its board of directors declared a cash dividend of $0.06 per share that was paid on October 22, 2015 to shareholders of record as of October 8, 2015. The Company subsequently announced that its board of directors declared a quarterly cash dividends of $0.06 per share that were paid in December 2015 and April 2016. The Company has since announced that its board of directors declared a cash dividend of $0.06 per share paid on July 12, 2016 to shareholders of record as of June 14, 2016.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

+ Details

Share-Based Compensation

6 Months Ended

Aug. 01, 2015

Share-Based Compensation

Note 12. Share-Based Compensation

The following table presents details of share-based compensation expenses by functional line item (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Cost of goods sold	$	2,012	$	1,733	$	3,559	$	4,032
Research and development		27,808		24,276		52,589		44,644
Selling and marketing		2,707		2,617		5,284		5,545
General and administrative		4,147		6,394		8,463		10,768

	$	36,674	$	35,020	$	69,895	$	64,989

Share-based compensation capitalized in inventory was $2.0 million at August 1, 2015 and $1.5 million at January 31, 2015.

Upon the termination of certain members of our executive management in April 2016, it was determined that the vesting in certain of their unvested stock awards was not probable. As a result, the Company recorded a reversal of the previously recognized related share-based compensation expense in the first quarter of fiscal 2017.

Valuation Assumptions

The following weighted average assumptions were used for each respective period to calculate the fair value of each time-based stock option award on the date of grant using the Black-Scholes valuation model and of each market-based equity award using a Monte Carlo simulation model:


	Three Months Ended						Six Months Ended
	August 1, 2015			August 2, 2014			August 1, 2015			August 2, 2014
Time-based Stock Options:
Weighted average fair value	$	3.97		$	3.98		$	3.98		$	4.37
Expected volatility		34	%		34	%		34	%		35	%
Expected term (in years)		5.4			5.0			5.4			5.0
Risk-free interest rate		1.6	%		1.7	%		1.6	%		1.6	%
Expected dividend yield		1.7	%		1.6	%		1.7	%		1.6	%


	Three and Six Months Ended
	August 1, 2015			August 2, 2014
Employee Stock Purchase Plan:
Estimated fair value	$	3.78		$	4.13
Volatility		31	%		32	%
Expected term (in years)		1.3			1.3
Risk-free interest rate		0.4	%		0.2	%
Dividend yield		1.7	%		1.6	%


	Six Months Ended
	August 1, 2015
Total Shareholder Return Awards:
Expected term (in years)		2.0
Expected volatility		27	%
Average correlation coefficient of peer companies		0.4	%
Risk-free interest rate		0.5	%
Expected dividend yield		1.7	%

The correlation coefficients are calculated based upon the price date used to calculate the historical volatilities and is used to model the way in which each entity tends to move in relation to its peers.

Related Party Transaction

6 Months Ended

Aug. 01, 2015

Related Party Transaction

Note 13. Related Party Transaction

In February 2015, the Executive Compensation Committee (“Committee”) of the Company’s Board of Directors approved a cash payment of approximately $15.4 million to Dr. Sehat Sutardja, the Company’s former Chief Executive Officer, which was recorded in the first quarter of fiscal 2016 and is included in general and administrative expense for the six months ended August 1, 2015. The U.S. Court of Federal Claims ruled against Dr. Sutardja in his legal challenge with the Internal Revenue Service and the California Franchise Tax Board related to the tax treatment of several stock options granted in fiscal 2004. After discussing and evaluating the alternatives to a continuing legal challenge of the court’s determination, the likelihood of success of further appeal by Dr. Sutardja and the potential negative impact on the Company of a continuation of the case regardless of the outcome, the Committee determined to provide Dr. Sutardja with relief from the financial effects of the penalty taxes. Accordingly, the Committee approved the cash payment to Dr. Sutardja equal to the amount of his penalty taxes owed under the Tax Codes, plus accrued interest owed with respect to such liabilities, all grossed-up for income taxes that will be owed by Dr. Sutardja on receipt of such cash payment. The Company paid $8.4 million to Dr. Sutardja in the six months ended August 1, 2015 representing reimbursement for the U.S. federal tax portion. As of August 1, 2015, the Company had a remaining $7.0 million liability to Dr. Sutardja.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Subsequent Events

6 Months Ended

Aug. 01, 2015

Subsequent Events

Note 14. Subsequent Events

In April 2016, the employment of Dr. Sehat Sutardja as Chief Executive Officer and Weili Dai as President was terminated by the Company’s Board of Directors. Dr. Sutardja and Ms. Dai remain on the Board of Directors at this time. The Board of Directors then formed an Interim Office of the Chief Executive and appointed Maya Strelar-Migotti, Executive Vice President of the Smart Networked Devices and Solutions Business Group, and Dr. Pantelis Alexopoulos, Executive Vice President of the Storage Business Group, as Interim Co-Chief Executive Officers, each having the authority to exercise all powers of the Chief Executive Officer. In June 2016, the Board of Directors appointed Matthew J. Murphy to serve as the Company’s President and Chief Executive Officer, effective July 11, 2016. Upon the commencement of Mr. Murphy’s employment, Ms. Strelar-Migotti and Dr. Alexopoulos returned to their roles as Executive Vice Presidents of the Company. The Board subsequently appointed Richard S. Hill, the Chairman of the Board, as the Company’s Interim Principal Executive Officer, to serve in that capacity until the Company files its Quarterly Report on Form 10-Q for the second quarter of fiscal 2017 (“Q217 Form 10-Q”). Mr. Murphy will assume the role of the Company’s principal executive officer immediately following the filing of the Q217 Form 10-Q. Mr. Murphy also joined the Board of Directors on July 11, 2016.

Also in April 2016, the Company announced that it entered into an agreement with Starboard Value LP (“Starboard”), regarding the composition of its Board of Directors. Under the terms of the agreement, the Company elected Peter A. Feld, Richard S. Hill, Oleg Khaykin, Michael Strachan and Robert Switz to serve on its board. Mr. Hill replaced Dr. Sutardja as the Chairman of the Board in May 2016. The agreement specifies that the Board will recommend and the Company will support and solicit proxies only for the election at the 2016 annual general meeting of Messrs. Feld, Hill, Khaykin, Murphy, Strachan and Switz and the four independent directors serving on the Board immediately prior to the execution of the agreement, Dr. Gromer, Dr. Kassakian, Mr. Krueger and Dr. Thakur.

In February 2016, the Company and CMU settled their patent infringement lawsuit pursuant to a court-ordered mediation and entered into a Settlement Agreement and Patent License (the “Agreement”). The parties agreed to mutual release of claims, license and covenant not to sue provisions for which the Company will pay an aggregate of $750 million to CMU. See CMU litigation under “Note 10 – Commitments and Contingencies” for further information about the lawsuit.

The Agreement was accounted for as a multiple-element arrangement and accordingly, a valuation was completed to determine the estimated fair value of each identifiable element. As a result, the Company allocated $654.7 million to the mutual release of claims and covenant not to sue provisions; $81.3 million to the licensing of intellectual property in fiscal 2016; and the remaining $14.0 million representing the future use of the license through April 2018.

The $654.7 million for the mutual release of claims and covenant not to sue was recorded in three and six months ended August 1, 2015 as a settlement charge reported separately in operating expenses since there is no future benefit. Of the $81.3 million license fee, $78.9 million was recorded in the three and six months ended August 1, 2015 as a charge in cost of goods sold for past use of the license with the remaining $2.4 million to be charged to cost of goods sold for the remainder of fiscal 2016. Due to the contingent status of the litigation at August 1, 2015, these charges were recorded in the three and six months ended August 1, 2015 since those unaudited condensed consolidated financial statements had not been filed with the Securities and Exchange Commission at the time the settlement was reached.

The Company considers its existing cash, cash equivalents and short-term investments to be sufficient to cover payment of the $750 million settlement, and in April 2016, the Company completed full payment of the $750 million to CMU.

The Company and Basis of Presentation (Policies)	6 Months Ended
The Company and Basis of Presentation (Policies)	Aug. 01, 2015
Basis of Presentation	*Basis of Presentation* The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. In a 52-week year, each fiscal quarter consists of 13 weeks. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2016 and 2015 each have a 52-week period. The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments consisting of normal and recurring entries considered necessary for a fair statement of the results for the interim periods have been included in the Company’s unaudited condensed consolidated balance sheet as of August 1, 2015, the results of its operations for the three and six months ended August 1, 2015 and August 2, 2014, its comprehensive income for the three and six months ended August 1, 2015 and August 2, 2014, and its cash flows for the six months ended August 1, 2015 and August 2, 2014. The January 31, 2015 condensed consolidated balance sheet data was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015, but does not include all disclosures required for annual periods. These condensed consolidated financial statements and related notes are unaudited and should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 as filed on March 26, 2015 with the Securities and Exchange Commission. The results of operations for the three and six months ended August 1, 2015 are not necessarily indicative of the results that may be expected for any other interim period or for the full fiscal year.
Use of Estimates	*Use of Estimates* The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to performance-based compensation, revenue recognition, provisions for sales returns and allowances, inventory excess and obsolescence, investment fair values, goodwill and other intangible assets, restructuring, income taxes, litigation and other contingencies. In addition, the Company uses assumptions when employing the Monte Carlo simulation and Black-Scholes valuation models to calculate the fair value of share-based awards that are granted. Actual results could differ from these estimates, and such differences could affect the results of operations reported in future periods.
Principles of Consolidation	*Principles of Consolidation* The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The functional currency of the Company and its subsidiaries is the U.S. dollar.
Accounting Pronouncements Recently Adopted	*Accounting Pronouncements Recently Adopted* In April 2014, the Financial Accounting Standards Board (“FASB”) issued an amendment to its guidance regarding the reporting requirements of discontinued operations, which was effective for the Company beginning in the first quarter of fiscal 2016. Under the amended guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. As a result, the Company has adopted and will apply the new guidance for any future dispositions that meet the criteria of a discontinued operation under the amendment. In November 2015, the FASB issued a new standard to simplify the presentation of deferred income taxes. Currently, deferred income tax assets and liabilities are separately presented as current and non-current amounts on the consolidated balance sheet. The new standard will require that deferred tax assets and liabilities be classified and presented on the balance sheet as non-current. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016, although early adoption is permitted. The Company will adopt the new guidance at the beginning of its fourth quarter of fiscal 2016 on a prospective basis, and will not retrospectively adjust any prior periods. Adoption will have no impact on the Company’s consolidated results of operations and it had no material impact on working capital.
Accounting Pronouncements Not Yet Effective	*Accounting Pronouncements Not Yet Effective* In May 2014, the FASB issued a new standard on the recognition of revenue from contracts with customers, which will supersede nearly all existing revenue recognition guidance under GAAP. Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and assets recognized from costs incurred to obtain or fulfill a contract will also be required. The FASB subsequently issued an update to this standard in August 2015, which provides deferral of the effective date by one year. The standard is now effective for the Company’s first quarter of fiscal 2019 and allows for either full retrospective or modified retrospective adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016 and including interim reporting periods within such reporting period. The FASB has since issued additional updates of its new standard on revenue recognition issued in May 2014. In March 2016, an amendment was issued to clarify the implementation guidance on principal versus agent consideration. The guidance requires entities to determine whether the nature of its promise to provide goods or services to a customer is performed in a principal or agent capacity and to recognize revenue in a gross or net manner based on its principal/agent designation. In April 2016, amendments were issued to clarify the identification of performance obligations and the licensing implementation guidance in the initial standard. Amendments were issued in May 2016 related to its guidance on assessing collectability, presentation of sales tax, noncash consideration, and completed contracts and contract modification at transition, which reduce the potential for diversity in practice, and the cost and complexity of application at transition and on an ongoing basis. The Company has been evaluating the effects of the new guidance and has not yet selected a transition method nor has it determined the potential effects of adoption on its consolidated financial statements. In April 2015, the FASB issued new guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The guidance provides a basis for evaluating whether a cloud computing arrangement includes a software license or whether the arrangement should be accounted for as a service contract. The guidance is effective for annual and interim reporting periods beginning after December 15, 2015. The newly issued guidance also strikes from previous authoritative guidance, the use by analogy to the accounting for capital leases, which the Company applied in the accounting for certain of its technology license agreements. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In July 2015, the FASB issued an amendment to its guidance regarding the subsequent measurement of inventory. Currently, inventory is measured at the lower of cost or market. Market could be replacement cost, net realizable value or net realizable value less an approximately normal profit margin. Under this amended guidance, inventory is to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This amendment applies to inventories for which cost is determined by methods other than last-in first-out and the retail inventory method. This standard is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In January 2016, the FASB issued new guidance which requires entities to measure all investments in equity securities at fair value with changes recognized through net income. This requirement does not apply to investments that qualify for the equity method of accounting, investments that result in consolidation of the investee, or investments for which the entity meets a practicability exception to fair value measurement. The new guidance also changes certain disclosure requirements for financial instruments. This standard is effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance on the effects of derivative contract novations on existing hedge accounting relationships. The new guidance clarifies that a change in the counterparty to a designated hedging instrument, in and of itself, does not require the de-designation of that hedging relationship, provided that all other hedge accounting criteria continue to be met. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures surrounding lease arrangements. The standard is effective for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance for investments that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. Under the amended guidance, the investor should apply the equity method prospectively from the date the investment qualifies for the equity method. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued new guidance which simplifies several aspects of the accounting for share-based payment award transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the probable initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for annual and interim reporting periods beginning after December 15, 2019. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

Investments (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Available-for-sale Securities Reconciliation

The following tables summarize the Company’s investments (in thousands):


	August 1, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	1,024,112	$	1,643	$	(1,557	)	$	1,024,198
U.S. government and agency debt		229,731		176		(19	)		229,888
Asset backed securities		101,216		99		(12	)		101,303
Foreign government and agency debt		16,945		7		(10	)		16,942
Municipal debt securities		37,780		38		(32	)		37,786

Total short-term investments		1,409,784		1,963		(1,630	)		1,410,117
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,377	)		10,123

Total long-term investments		12,500		—		(2,377	)		10,123

Total investments	$	1,422,284	$	1,963	$	(4,007	)	$	1,420,240


	January 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	983,008	$	3,872	$	(563	)	$	986,317
U.S. government and agency debt		178,898		265		(7	)		179,156
Asset backed securities		91,432		108		(9	)		91,531
Foreign government and agency debt		28,051		61		(2	)		28,110
Municipal debt securities		33,421		47		(4	)		33,464

Total short-term investments		1,314,810		4,353		(585	)		1,318,578
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,274	)		10,226

Total long-term investments		12,500		—		(2,274	)		10,226

Total investments	$	1,327,310	$	4,353	$	(2,859	)	$	1,328,804

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands):


	Three Months Ended					Six Months Ended
	August 1, 2015			August 2, 2014		August 1, 2015			August 2, 2014
Gross realized gains	$	255		$	480	$	698		$	952
Gross realized losses		(230	)		—		(337	)		(25	)

Total net realized gains	$	25		$	480	$	361		$	927

Investments Classified by Contractual Maturity Date

The contractual maturities of available-for-sale securities are presented in the following tables (in thousands):


	August 1, 2015				January 31, 2015
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	332,385	$	332,406	$	361,108	$	361,396
Due between one and five years		1,068,461		1,068,779		950,702		954,151
Due over five years		21,438		19,055		15,500		13,257

	$	1,422,284	$	1,420,240	$	1,327,310	$	1,328,804

Unrealized Loss Position Investments


	August 1, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	490,575	$	(1,539	)	$	6,053	$	(18	)	$	496,628	$	(1,557	)
U.S. government and agency debt		64,067		(19	)		—		—			64,067		(19	)
Asset backed securities		30,602		(12	)		—		—			30,602		(12	)
Foreign government and agency debt		13,938		(10	)		—		—			13,938		(10	)
Municipal debt securities		10,532		(32	)		—		—			10,532		(32	)
Auction rate securities		—		—			10,123		(2,377	)		10,123		(2,377	)

Total securities	$	609,714	$	(1,612	)	$	16,176	$	(2,395	)	$	625,890	$	(4,007	)


	January 31, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	243,699	$	(558	)	$	2,005	$	(5	)	$	245,704	$	(563	)
U.S. government and agency debt		32,165		(7	)		—		—			32,165		(7	)
Asset backed securities		25,053		(9	)		—		—			25,053		(9	)
Foreign government and agency debt		2,999		(2	)		—		—			2,999		(2	)
Municipal debt securities		2,845		(4	)		—		—			2,845		(4	)
Auction rate securities		—		—			10,226		(2,274	)		10,226		(2,274	)

Total securities	$	306,761	$	(580	)	$	12,231	$	(2,279	)	$	318,992	$	(2,859	)

Supplemental Financial Information (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Inventory, Current


	August 1, 2015		January 31, 2015
Inventories:
Work-in-process	$	198,158	$	183,869
Finished goods		128,945		124,293

Total inventories	$	327,103	$	308,162

Property, Plant and Equipment


	August 1, 2015		January 31, 2015
Inventories:
Work-in-process	$	198,158	$	183,869
Finished goods		128,945		124,293

Total inventories	$	327,103	$	308,162


	August 1, 2015			January 31, 2015
Property and equipment, net:
Machinery and equipment	$	623,191		$	601,961
Buildings		144,320			144,320
Computer software		102,801			99,312
Land		53,373			53,373
Building improvements		49,902			49,753
Leasehold improvements		50,350			51,434
Furniture and fixtures		27,531			27,883
Construction in progress		4,680			6,167

		1,056,148			1,034,203
Less: Accumulated depreciation and amortization		(733,886	)		(693,564	)

Total property and equipment, net	$	322,262		$	340,639

Schedule of Other Assets, Noncurrent



	August 1, 2015		January 31, 2015
Other non-current assets:
Technology and other licenses	$	48,518	$	61,217
Deferred tax assets		19,288		22,273
Investments in privately-held companies		8,556		9,267
Prepaid land use rights		13,277		13,432
Deposits		7,649		7,903
Other		13,169		14,747

Total other non-current assets	$	110,457	$	128,839

Schedule of Accrued Liabilities


	August 1, 2015		January 31, 2015
Accrued liabilities:
Accrued rebates	$	35,826	$	39,105
Accrued royalties		19,130		24,680
Accrued share repurchases		19,672		—
Technology license obligations		10,802		14,428
Accrued legal expense		5,460		8,327
Accrued litigation		11,238		1,700
Other		58,841		43,148

Total accrued liabilities	$	160,969	$	131,388

Other Noncurrent Liabilities



	August 1, 2015		January 31, 2015
Other non-current liabilities:
Technology license obligations	$	12,767	$	16,468
Long-term accrued employee compensation		6,323		4,610
Other		8,347		11,115

Other non-current liabilities	$	27,437	$	32,193

Changes in Accumulated Other Comprehensive Income (loss) by Components

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands):


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at January 31, 2015	$	3,768		$	(2,274	)	$	(1,186	)	$	308
Other comprehensive income (loss) before reclassifications		(2,865	)		(103	)		1,166			(1,802	)
Amounts reclassified from accumulated other comprehensive income (loss)		(453	)		—			669			216

Other comprehensive income (loss), net of tax		(3,318	)		(103	)		1,835			(1,586	)

Balance at August 1, 2015	$	450		$	(2,377	)	$	649		$	(1,278	)


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at February 1, 2014	$	2,534		$	(2,871	)	$	934		$	597
Other comprehensive income before reclassifications		1,012			143			734			1,889
Amounts reclassified from accumulated other comprehensive income (loss)		(855	)		—			(1,004	)		(1,859	)

Other comprehensive income (loss), net of tax		157			143			(270	)		30

Balance at August 2, 2014	$	2,691		$	(2,728	)	$	664		$	627

Amounts Reclassified from Accumulated Other Comprehensive Income (loss) by Components

The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands):


	Three Months Ended				Six Months Ended
Affected Line Item in the Statement of Operations	August 1, 2015		August 2, 2014		August 1, 2015			August 2, 2014
Interest and other income, net:
Available-for-sale securities:
Marketable securities	$	121	$	435	$	453		$	855
Operating cost and expenses:
Cash flow hedges:
Research and development		251		200		(613	)		921
Selling and marketing		4		19		(63	)		81
General and administrative		20		—		7			2

Total	$	396	$	654	$	(216	)	$	1,859

Interest and Other Income, Net

Consolidated Statements of Operations


	Three Months Ended						Six Months Ended
	August 1, 2015			August 2, 2014			August 1, 2015			August 2, 2014
Interest and other income, net:
Interest income	$	3,971		$	2,315		$	8,048		$	4,924
Net realized gain on investments		25			480			361			927
Currency translation gain (loss)		3,494			339			3,901			(686	)
Other income (expense)		(508	)		9,438			59			9,657
Interest expense		(192	)		(309	)		(412	)		(634	)

	$	6,790		$	12,263		$	11,957		$	14,188

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts):


	Three Months Ended					Six Months Ended
	August 1, 2015			August 2, 2014		August 1, 2015			August 2, 2014
Numerator:
Net income (loss)	$	(771,940	)	$	138,870	$	(757,850	)	$	238,349

Denominator:
Weighted average shares — basic		516,368			511,821		516,298			508,463
Effect of dilutive securities:
Share-based awards		—			8,448		—			12,047

Weighted average shares — diluted		516,368			520,269		516,298			520,510

Net income (loss) per share:
Basic	$	(1.49	)	$	0.27	$	(1.47	)	$	0.47
Diluted	$	(1.49	)	$	0.27	$	(1.47	)	$	0.46

Anti-dilutive Potential Shares

Anti-dilutive potential shares are presented in the following table (in thousands):

Three Months Ended

Six Months Ended

August 1,
2015

August 2,
2014

August 1,
2015

August 2,
2014

Weighted average shares outstanding:

Share-based awards

57,437

26,132

57,519

24,341

Derivative Financial Instruments (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Derivative Instruments

The notional amounts of outstanding forward contracts were as follows (in thousands):


	Buy Contracts
	August 1, 2015		January 31, 2015
Israeli shekel	$	18,749	$	51,326

Information about Gains (Losses) Associated with Derivative Financial Instruments

The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands):


		Amount of Gains (Losses) in Statement of Operations
		Three Months Ended					Six Months Ended
	Location of Gains (Losses) in Statement of Operations	August 1, 2015		August 2, 2014			August 1, 2015			August 2, 2014
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	415	$	311		$	(576	)	$	909
	Selling and marketing		6		30			(71	)		82
	General and administrative		32		(3	)		18			(1	)

		$	453	$	338		$	(629	)	$	990

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41641-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41638-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Fair Value Measurements (Tables)

6 Months Ended

Aug. 01, 2015

Fair Value, Assets and Liabilities Measured on Recurring Basis


	August 1, 2015
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	14,819	$	—	$	—	$	14,819
Time deposits		—		204,358		—		204,358
Corporate debt securities		—		20,675		—		20,675
Short-term investments:
U.S. government and agency debt		229,888		—		—		229,888
Corporate debt securities		—		1,024,198		—		1,024,198
Asset backed securities		—		101,303		—		101,303
Foreign government and agency debt		—		16,942		—		16,942
Municipal debt securities		—		37,786		—		37,786
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		624		—		624
Long-term investments:
Auction rate securities		—		—		10,123		10,123
Other non-current assets:
Severance pay fund		—		1,925		—		1,925

Total assets	$	244,707	$	1,407,811	$	10,123	$	1,662,641


	January 31, 2015
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	111,286	$	—	$	—	$	111,286
Time deposits		—		213,012		—		213,012
Corporate debt securities		—		21,999		—		21,999
Short-term investments:
U.S. government and agency debt		179,156		—		—		179,156
Corporate debt securities		—		986,317		—		986,317
Asset backed securities		—		91,531		—		91,531
Foreign government and agency debt		—		28,110		—		28,110
Municipal debt securities		—		33,464		—		33,464
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		124		—		124
Long-term investments:
Auction rate securities		—		—		10,226		10,226
Other non-current assets:
Severance pay fund		—		1,758		—		1,758

Total assets	$	290,442	$	1,376,315	$	10,226	$	1,676,983

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	1,379	$	—	$	1,379

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The following table summarizes the change in fair value for Level 3 assets (in thousands):


	Six Months Ended
	August 1, 2015			August 2, 2014
Beginning balance	$	10,226		$	16,279
Sales and redemptions		—			(3,000	)
Unrealized losses included in accumulated other comprehensive income		(103	)		143

Ending balance	$	10,123		$	13,422

Acquired Intangible Assets, Net (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Finite-Lived Intangible Assets by Major Class

The carrying amounts of acquired intangible assets, net, are as follows (in thousands):


		August 1, 2015							January 31, 2015
	Range of Useful Lives	Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts
Purchased and core technology	4 - 8 years	$	36,348	$	(19,303	)	$	17,045	$	36,348	$	(16,107	)	$	20,241
Trade names	5 years		1,300		(958	)		342		1,300		(828	)		472
Customer intangibles	5 - 7 years		28,600		(21,395	)		7,205		28,600		(18,615	)		9,985

Total intangible assets, net		$	66,248	$	(41,656	)	$	24,592	$	66,248	$	(35,550	)	$	30,698

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Based on the identified intangible assets recorded at August 1, 2015, the future amortization expense for the next five fiscal years is as follows (in thousands):


Fiscal Year
Remainder of fiscal 2016	$	6,106
2017		11,027
2018		5,599
2019		1,860
2020 and thereafter		—

	$	24,592

Restructuring and Other Related Charges (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Restructuring Reserve by Type of Cost

The following table provides a summary of restructuring and other related charges as presented in the unaudited condensed consolidated statements of operations (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Restructuring and other related charges	$	13,000	$	735	$	13,592	$	5,823
Write-off of acquired intangible assets		—		—		—		3,386

	$	13,000	$	735	$	13,592	$	9,209

The following table presents details of charges recorded by the Company related to the restructuring actions described below (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Severance and related costs	$	11,705	$	418	$	11,705	$	5,035
Facilities and related costs		206		254		225		698
Other exit-related costs		189		63		189		73

		12,100		735		12,119		5,806
Impairment and write-off of assets:
Equipment		900		—		1,473		17
Acquired intangible asset		—		—		—		3,386

	$	13,000	$	735	$	13,592	$	9,209

Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs

The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands):


	Severance and Related Costs			Facilities and Related Costs			Other Exit-Related Costs			Total
Balance at January 31, 2015	$	—		$	1,339		$	3,230		$	4,569
Restructuring charges		11,705			225			189			12,119
Net cash payments		(2,392	)		(476	)		(3,419	)		(6,287	)
Exchange rate adjustment		(104	)		(67	)		—			(171	)

Balance at August 1, 2015	$	9,209		$	1,021		$	—		$	10,230

Shareholders' Equity (Tables)

6 Months Ended

Aug. 01, 2015

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except per share amounts):


	Time-Based Options					Market-Based Options					Total
	Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price
Balance at January 31, 2015		47,140		$	13.79		2,232		$	15.43		49,372		$	13.88
Granted		5,872		$	14.37		—		$	—		5,872		$	14.37
Exercised		(1,829	)	$	10.24		—		$	—		(1,829	)	$	10.24
Canceled/Forfeited		(3,718	)	$	16.80		(8	)	$	15.43		(3,726	)	$	16.80

Balance at August 1, 2015		47,465		$	13.77		2,224		$	15.43		49,689		$	13.84

Vested or expected to vest at August 1, 2015		44,264		$	13.77

Exercisable at August 1, 2015		24,586		$	14.44

Schedule of Nonvested Share Activity

Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices):


	Time-Based					Performance-Based					Market-Based					Total
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Balance at January 31, 2015		9,748		$	14.84		1,254		$	14.99							11,002		$	14.85
Granted		4,873		$	13.66		669		$	14.08		407		$	12.24		5,949		$	13.61
Vested		(4,601	)	$	15.30		(658	)	$	15.15		—		$	—		(5,259	)	$	15.28
Canceled/Forfeited		(409	)	$	14.06		(227	)	$	14.43		(54	)	$	12.24		(690	)	$	13.09

Balance at August 1, 2015		9,611		$	14.05		1,038		$	14.42		353		$	12.24		11,002		$	14.03

Schedule of Cash Dividends

The Company paid the following cash dividends (in thousands, except per share amounts):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Cash dividend per share	$	0.06	$	0.06	$	0.12	$	0.12

Total payment to shareholders	$	31,194	$	30,820	$	62,104	$	60,992

Share-Based Compensation (Tables)

6 Months Ended

Aug. 01, 2015

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table presents details of share-based compensation expenses by functional line item (in thousands):


	Three Months Ended				Six Months Ended
	August 1, 2015		August 2, 2014		August 1, 2015		August 2, 2014
Cost of goods sold	$	2,012	$	1,733	$	3,559	$	4,032
Research and development		27,808		24,276		52,589		44,644
Selling and marketing		2,707		2,617		5,284		5,545
General and administrative		4,147		6,394		8,463		10,768

	$	36,674	$	35,020	$	69,895	$	64,989

Employee Stock Purchase Plan

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Three and Six Months Ended
	August 1, 2015			August 2, 2014
Employee Stock Purchase Plan:
Estimated fair value	$	3.78		$	4.13
Volatility		31	%		32	%
Expected term (in years)		1.3			1.3
Risk-free interest rate		0.4	%		0.2	%
Dividend yield		1.7	%		1.6	%

Total Shareholder Return

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Six Months Ended
	August 1, 2015
Total Shareholder Return Awards:
Expected term (in years)		2.0
Expected volatility		27	%
Average correlation coefficient of peer companies		0.4	%
Risk-free interest rate		0.5	%
Expected dividend yield		1.7	%

Time Based Option Award

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Three Months Ended						Six Months Ended
	August 1, 2015			August 2, 2014			August 1, 2015			August 2, 2014
Time-based Stock Options:
Weighted average fair value	$	3.97		$	3.98		$	3.98		$	4.37
Expected volatility		34	%		34	%		34	%		35	%
Expected term (in years)		5.4			5.0			5.4			5.0
Risk-free interest rate		1.6	%		1.7	%		1.6	%		1.6	%
Expected dividend yield		1.7	%		1.6	%		1.7	%		1.6	%

Summary of Investments (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Amortized Cost	$ 1,422,284	$ 1,327,310
Gross Unrealized Gains	1,963	4,353
Gross Unrealized Losses	(4,007)	(2,859)
Estimated Fair Value	1,420,240	1,328,804
Short-term Investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	1,409,784	1,314,810
Gross Unrealized Gains	1,963	4,353
Gross Unrealized Losses	(1,630)	(585)
Estimated Fair Value	1,410,117	1,318,578
Short-term Investments \| Corporate debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	1,024,112	983,008
Gross Unrealized Gains	1,643	3,872
Gross Unrealized Losses	(1,557)	(563)
Estimated Fair Value	1,024,198	986,317
Short-term Investments \| U.S. government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	229,731	178,898
Gross Unrealized Gains	176	265
Gross Unrealized Losses	(19)	(7)
Estimated Fair Value	229,888	179,156
Short-term Investments \| Asset-backed Securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	101,216	91,432
Gross Unrealized Gains	99	108
Gross Unrealized Losses	(12)	(9)
Estimated Fair Value	101,303	91,531
Short-term Investments \| Foreign government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	16,945	28,051
Gross Unrealized Gains	7	61
Gross Unrealized Losses	(10)	(2)
Estimated Fair Value	16,942	28,110
Short-term Investments \| Municipal debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	37,780	33,421
Gross Unrealized Gains	38	47
Gross Unrealized Losses	(32)	(4)
Estimated Fair Value	37,786	33,464
Long-term investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	(2,377)	(2,274)
Estimated Fair Value	10,123	10,226
Long-term investments \| Auction rate securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	(2,377)	(2,274)
Estimated Fair Value	$ 10,123	$ 10,226

Investments - Additional Information (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Amortized Cost	$ 1,422,284	$ 1,327,310
Gross Unrealized Losses	4,007	2,859
Cash, cash equivalents and short-term investments	2,300,000
Long-term investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	2,377	2,274
Long-term investments \| Auction rate securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	$ 2,377	$ 2,274

- Definition

Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

+ References + Details

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	$ 255	$ 480	$ 698	$ 952
Gross realized losses	(230)		(337)	(25)
Total net realized gains	$ 25	$ 480	$ 361	$ 927

Contractual Maturities of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Amortized Cost
Due in one year or less	$ 332,385	$ 361,108
Due between one and five years	1,068,461	950,702
Due over five years	21,438	15,500
Amortized Cost	1,422,284	1,327,310
Estimated Fair Value
Due in one year or less	332,406	361,396
Due between one and five years	1,068,779	954,151
Due over five years	19,055	13,257
Estimated Fair Value	$ 1,420,240	$ 1,328,804

Summary of Investments Gross Unrealized Losses and Fair Value (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	$ 609,714	$ 306,761
Less than 12 months Unrealized Losses	(1,612)	(580)
12 months or more Fair Value	16,176	12,231
12 months or more Unrealized Losses	(2,395)	(2,279)
Total Fair Value	625,890	318,992
Total Unrealized Losses	(4,007)	(2,859)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	490,575	243,699
Less than 12 months Unrealized Losses	(1,539)	(558)
12 months or more Fair Value	6,053	2,005
12 months or more Unrealized Losses	(18)	(5)
Total Fair Value	496,628	245,704
Total Unrealized Losses	(1,557)	(563)
U.S. government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	64,067	32,165
Less than 12 months Unrealized Losses	(19)	(7)
Total Fair Value	64,067	32,165
Total Unrealized Losses	(19)	(7)
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	30,602	25,053
Less than 12 months Unrealized Losses	(12)	(9)
Total Fair Value	30,602	25,053
Total Unrealized Losses	(12)	(9)
Foreign government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	13,938	2,999
Less than 12 months Unrealized Losses	(10)	(2)
Total Fair Value	13,938	2,999
Total Unrealized Losses	(10)	(2)
Municipal debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	10,532	2,845
Less than 12 months Unrealized Losses	(32)	(4)
Total Fair Value	10,532	2,845
Total Unrealized Losses	(32)	(4)
Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
12 months or more Fair Value	10,123	10,226
12 months or more Unrealized Losses	(2,377)	(2,274)
Total Fair Value	10,123	10,226
Total Unrealized Losses	$ (2,377)	$ (2,274)

Inventories (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Inventory [Line Items]
Work-in-process	$ 198,158	$ 183,869
Finished goods	128,945	124,293
Total inventories	$ 327,103	$ 308,162

Property and Equipment Net (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,056,148	$ 1,034,203
Less: Accumulated depreciation	(733,886)	(693,564)
Property and equipment, net	322,262	340,639
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	623,191	601,961
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	144,320	144,320
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	102,801	99,312
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,373	53,373
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	49,902	49,753
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	50,350	51,434
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,531	27,883
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,680	$ 6,167

Other Non Current Assets (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Other non-current assets:
Technology and other licenses	$ 48,518	$ 61,217
Deferred tax assets	19,288	22,273
Investments in privately-held companies	8,556	9,267
Prepaid land use rights	13,277	13,432
Deposits	7,649	7,903
Other	13,169	14,747
Other non-current assets	$ 110,457	$ 128,839

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Accrued liabilities:
Accrued rebates	$ 35,826	$ 39,105
Accrued royalties	19,130	24,680
Accrued share repurchases	19,672
Technology license obligations	10,802	14,428
Accrued legal expense	5,460	8,327
Accrued litigation	11,238	1,700
Other	58,841	43,148
Accrued liabilities	$ 160,969	$ 131,388

Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Other non-current liabilities:
Technology license obligations	$ 12,767	$ 16,468
Long-term accrued employee compensation	6,323	4,610
Other	8,347	11,115
Other non-current liabilities	$ 27,437	$ 32,193

Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 308	$ 597
Other comprehensive income (loss) before reclassifications			(1,802)	1,889
Amounts reclassified from accumulated other comprehensive income (loss)			216	(1,859)
Other comprehensive income (loss), net of tax	$ (1,358)	$ 218	(1,586)	30
Ending Balance	(1,278)	627	(1,278)	627
Unrealized Gain (Loss) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,768	2,534
Other comprehensive income (loss) before reclassifications			(2,865)	1,012
Amounts reclassified from accumulated other comprehensive income (loss)			(453)	(855)
Other comprehensive income (loss), net of tax			(3,318)	157
Ending Balance	450	2,691	450	2,691
Unrealized Gain (Loss) on Auction Rate Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,274)	(2,871)
Other comprehensive income (loss) before reclassifications			(103)	143
Other comprehensive income (loss), net of tax			(103)	143
Ending Balance	(2,377)	(2,728)	(2,377)	(2,728)
Unrealized Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,186)	934
Other comprehensive income (loss) before reclassifications			1,166	734
Amounts reclassified from accumulated other comprehensive income (loss)			669	(1,004)
Other comprehensive income (loss), net of tax			1,835	(270)
Ending Balance	$ 649	$ 664	$ 649	$ 664

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Amounts Reclassified from Accumulated Other Comprehensive Income by Components (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	$ 6,790	$ 12,263	$ 11,957	$ 14,188
Operating cost and expenses:
Research and development	(285,641)	(294,352)	(565,755)	(585,033)
Selling and marketing	(30,841)	(33,997)	(67,015)	(72,307)
General and administrative	(35,243)	(30,962)	(75,678)	(61,177)
Net income (loss)	(771,940)	138,870	(757,850)	238,349
Reclassification out of Accumulated Other Comprehensive Income
Operating cost and expenses:
Net income (loss)	396	654	(216)	1,859
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized Gain (Loss) on Marketable Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	121	435	453	855
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized Gain (Loss) on Cash Flow Hedges
Operating cost and expenses:
Research and development	251	200	(613)	921
Selling and marketing	4	$ 19	(63)	81
General and administrative	$ 20		$ 7	$ 2

Interest and Other Income Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Interest and other income, net:
Interest income	$ 3,971	$ 2,315	$ 8,048	$ 4,924
Net realized gain on investments	25	480	361	927
Currency translation gain (loss)	3,494	339	3,901	(686)
Other income (expense)	(508)	9,438	59	9,657
Interest expense	(192)	(309)	(412)	(634)
Interest and other income, net	$ 6,790	$ 12,263	$ 11,957	$ 14,188

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References + Details

Computations of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Numerator:
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Denominator:
Weighted average shares - basic	516,368	511,821	516,298	508,463
Effect of dilutive securities:
Share-based awards		8,448		12,047
Weighted average shares - diluted	516,368	520,269	516,298	520,510
Basic	$ (1.49)	$ 0.27	$ (1.47)	$ 0.47
Diluted	$ (1.49)	$ 0.27	$ (1.47)	$ 0.46

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Anti-dilutive Potential Shares (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Stock Compensation Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares outstanding from share-based awards	57,437	26,132	57,519	24,341

Notional Amounts of Outstanding Foreign Currency Forward Contracts (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Foreign Exchange Buy Contracts \| Israeli shekel
Derivative [Line Items]
Derivative, notional amount	$ 18,749	$ 51,326

Information about Gains (Losses) Associated with Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ 453	$ 338	$ (629)	$ 990
Cash flow hedges \| Foreign currency forward contracts \| Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	415	311	(576)	909
Cash flow hedges \| Foreign currency forward contracts \| Selling and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	6	30	(71)	82
Cash flow hedges \| Foreign currency forward contracts \| General and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ 32	$ (3)	$ 18	$ (1)

Fair Value Measurements - Additional Information (Detail) $ in Millions	Aug. 01, 2015 USD ($)
Fair Value, Measurement Inputs, Disclosure [Line Items]
Percentage of total amount of assets measured using Level 3 valuation methodologies to total assets	0.20%
Carrying value of equipment held for sale	$ 9.3

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) - Items measured at fair value - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Assets
Total assets	$ 1,662,641	$ 1,676,983
Other non-current assets \| Severance Pay Fund
Assets
Other non-current asset	1,925	1,758
Corporate debt securities \| Short-term Investments
Assets
Investments	1,024,198	986,317
U.S. government and agency debt \| Short-term Investments
Assets
Investments	229,888	179,156
Asset-backed Securities \| Short-term Investments
Assets
Investments	101,303	91,531
Foreign government and agency debt \| Short-term Investments
Assets
Investments	16,942	28,110
Municipal debt securities \| Short-term Investments
Assets
Investments	37,786	33,464
Foreign currency forward contracts
Liabilities
Accrued liabilities		1,379
Foreign currency forward contracts \| Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	624	124
Auction rate securities \| Long-term investments
Assets
Investments	10,123	10,226
Cash equivalents \| Money market funds
Assets
Cash equivalents	14,819	111,286
Cash equivalents \| Time deposits
Assets
Cash equivalents	204,358	213,012
Cash equivalents \| Corporate debt securities
Assets
Cash equivalents	20,675	21,999
Level 1
Assets
Total assets	244,707	290,442
Level 1 \| U.S. government and agency debt \| Short-term Investments
Assets
Investments	229,888	179,156
Level 1 \| Cash equivalents \| Money market funds
Assets
Cash equivalents	14,819	111,286
Level 2
Assets
Total assets	1,407,811	1,376,315
Level 2 \| Other non-current assets \| Severance Pay Fund
Assets
Other non-current asset	1,925	1,758
Level 2 \| Corporate debt securities \| Short-term Investments
Assets
Investments	1,024,198	986,317
Level 2 \| Asset-backed Securities \| Short-term Investments
Assets
Investments	101,303	91,531
Level 2 \| Foreign government and agency debt \| Short-term Investments
Assets
Investments	16,942	28,110
Level 2 \| Municipal debt securities \| Short-term Investments
Assets
Investments	37,786	33,464
Level 2 \| Foreign currency forward contracts
Liabilities
Accrued liabilities		1,379
Level 2 \| Foreign currency forward contracts \| Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	624	124
Level 2 \| Cash equivalents \| Time deposits
Assets
Cash equivalents	204,358	213,012
Level 2 \| Cash equivalents \| Corporate debt securities
Assets
Cash equivalents	20,675	21,999
Level 3
Assets
Total assets	10,123	10,226
Level 3 \| Auction rate securities \| Long-term investments
Assets
Investments	$ 10,123	$ 10,226

Summary of Change in Fair Values for Level Three Items (Detail) - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,226	$ 16,279
Sales and redemptions		(3,000)
Unrealized losses included in accumulated other comprehensive income	(103)	143
Ending balance	$ 10,123	$ 13,422

Acquired Intangible Assets Net (Detail) - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Jan. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 66,248	$ 66,248
Accumulated Amortization and Write-Offs	(41,656)	(35,550)
Net Carrying Amounts	24,592	30,698
Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	36,348	36,348
Accumulated Amortization and Write-Offs	(19,303)	(16,107)
Net Carrying Amounts, Finite-Lived	$ 17,045	20,241
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Gross Carrying Amounts, Finite-Lived	$ 1,300	1,300
Accumulated Amortization and Write-Offs	(958)	(828)
Net Carrying Amounts, Finite-Lived	342	472
Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	28,600	28,600
Accumulated Amortization and Write-Offs	(21,395)	(18,615)
Net Carrying Amounts, Finite-Lived	$ 7,205	$ 9,985
Minimum \| Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	4 years
Minimum \| Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Maximum \| Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	8 years
Maximum \| Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	7 years

Future Amortization Expense of Identified Intangibles (Detail) - In Process Research and Development Excluded $ in Thousands	Aug. 01, 2015 USD ($)
Fiscal Year
Remainder of fiscal 2016	$ 6,106
2017	11,027
2018	5,599
2019	1,860
2020 and thereafter	0
Net Carrying Amounts, Finite-Lived	$ 24,592

Restructuring Charges (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
Restructuring Charges (Detail) - USD ($) $ in Thousands	May 31, 2015	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges		$ 13,000	$ 735	$ 13,592	$ 5,823
Severance and related costs		11,705	418	11,705	5,035
Facilities and related costs		206	254	225	698
Other exit-related costs		189	63	189	73
Restructuring charges	$ 11,900	12,100	735	12,119	5,806
Impairment and write-off of assets: Equipment		900		1,473	17
Impairment and write-off of assets: Acquired intangible asset					3,386
Restructuring Costs and Asset Impairment Charges, Total		$ 13,000	$ 735	$ 13,592	$ 9,209

Restructuring - Additional Information (Detail)	1 Months Ended		3 Months Ended		6 Months Ended
Restructuring - Additional Information (Detail)	Oct. 31, 2015 USD ($)	May 31, 2015 USD ($) Employee	Aug. 01, 2015 USD ($)	Aug. 02, 2014 USD ($)	Aug. 01, 2015 USD ($)	Aug. 02, 2014 USD ($)	Sep. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 11,900,000	$ 12,100,000	$ 735,000	$ 12,119,000	$ 5,806,000
Total number of employees to be terminated \| Employee		313
Lease obligation vocation date		2015-07
Impairment charges of equipment held for sale			900,000		1,473,000	$ 17,000
Carrying value of equipment held for sale			$ 9,300,000		9,300,000
Recognized gain (loss) on sale of equipment					0
Subsequent Event
Restructuring Cost and Reserve [Line Items]
Net proceeds from sale of equipment	$ 9,300,000
Minimum \| Subsequent Event
Restructuring Cost and Reserve [Line Items]
Total charge expected to incur							$ 100,000,000
Maximum \| Subsequent Event
Restructuring Cost and Reserve [Line Items]
Total charge expected to incur							$ 130,000,000
Corporate Equipment
Restructuring Cost and Reserve [Line Items]
Impairment charges of equipment held for sale					$ 900,000

Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2015	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				$ 4,569
Restructuring charges	$ 11,900	$ 12,100	$ 735	12,119	$ 5,806
Net cash payments				(6,287)
Exchange rate adjustment				(171)
Restructuring liabilities, ending balance		10,230		10,230
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				11,705
Net cash payments				(2,392)
Exchange rate adjustment				(104)
Restructuring liabilities, ending balance		9,209		9,209
Facilities and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				1,339
Restructuring charges				225
Net cash payments				(476)
Exchange rate adjustment				(67)
Restructuring liabilities, ending balance		$ 1,021		1,021
Other Exit-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				3,230
Restructuring charges				189
Net cash payments				$ (3,419)

Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014	Feb. 28, 2015
Income Tax Contingency [Line Items]
Current income tax liability	$ 15.2	$ 4.9	$ 19.5	$ 10.6
Deferred tax asset valuation allowance	6.7		6.7
Unrecognized tax benefits reduction in expiration of statutes of limitation	11.7	13.2	14.8
True-up adjustments	4.8		4.8
Additional tax provision			3.1
Net reduction in unrecognized tax benefits		(7.3)		(9.8)
Tax benefit from an increase in deferred tax asset due to change in negotiated development and expansion incentive		3.7		11.5
Increase in current year unrecognized tax benefit estimates		3.4
Uncertain tax positions decrease from the lapse of statutes of limitation in various jurisdictions during next 12 months	(18.7)		(18.7)
Tax incentives, tax savings amount	1.6	$ 7.1	4.9	$ 10.4
Cash, cash equivalents and short-term investments	2,300.0		2,300.0
Undistributed earnings of foreign subsidiaries	$ 550.0		$ 550.0
Maximum
Income Tax Contingency [Line Items]
Tax incentives, per share effect on earning	$ 0.01	$ 0.01	$ 0.01	$ 0.02
Former Chief Executive Officer
Income Tax Contingency [Line Items]
Liability to related party					$ 15.4
Foreign Subsidiaries
Income Tax Contingency [Line Items]
Cash, cash equivalents and short-term investments	$ 800.0		$ 800.0
Increase (decrease) in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda			$ 160.0

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions			1 Months Ended	6 Months Ended
	Feb. 16, 2016	Dec. 26, 2012	Apr. 30, 2016	Aug. 01, 2015	Nov. 14, 2014	Aug. 01, 2014
Commitments and Contingencies Disclosure [Line Items]
Accrued litigation				$ 744.8
Carrying value of pledged assets				$ 136.2
Bond Issuance Date				Apr. 21, 2016
Carnegie Mellon Litigation
Commitments and Contingencies Disclosure [Line Items]
Date of lawsuit filed				Mar. 06, 2009
Loss contingency, awarded amount		$ 1,170.0		$ 1,540.0
Settlement Agreement and Patent License \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Amount agreed to pay pursuant to settlement	$ 750.0		$ 750.0
Primary Surety Bond \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond	439.0
Secondary Surety Bond \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond	$ 311.0
Surety Bond
Commitments and Contingencies Disclosure [Line Items]
Bond					$ 216.0	$ 1,540.0
Commitment Letter
Commitments and Contingencies Disclosure [Line Items]
Bond					$ 95.0
Manufacturing Expense
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment, outstanding commitment				$ 215.2

Stock Option Plan Activity (Detail) shares in Thousands	6 Months Ended
Stock Option Plan Activity (Detail) shares in Thousands	Aug. 01, 2015 $ / shares shares
Options Outstanding
Beginning Balance \| shares	49,372
Granted \| shares	5,872
Exercised \| shares	(1,829)
Canceled/Forfeited \| shares	(3,726)
Ending Balance \| shares	49,689
Weighted Average Exercise Price
Beginning Balance \| $ / shares	$ 13.88
Granted \| $ / shares	14.37
Exercised \| $ / shares	10.24
Canceled/Forfeited \| $ / shares	16.80
Ending Balance \| $ / shares	$ 13.84
Time Based Option Award
Options Outstanding
Beginning Balance \| shares	47,140
Granted \| shares	5,872
Exercised \| shares	(1,829)
Canceled/Forfeited \| shares	(3,718)
Ending Balance \| shares	47,465
Vested or expected to vest at August 1, 2015 \| shares	44,264
Exercisable at August 1, 2015 \| shares	24,586
Weighted Average Exercise Price
Beginning Balance \| $ / shares	$ 13.79
Granted \| $ / shares	14.37
Exercised \| $ / shares	10.24
Canceled/Forfeited \| $ / shares	16.80
Ending Balance \| $ / shares	13.77
Vested or expected to vest at August 1, 2015 \| $ / shares	13.77
Exercisable at August 1, 2015 \| $ / shares	$ 14.44
Market Based Option Award
Options Outstanding
Beginning Balance \| shares	2,232
Canceled/Forfeited \| shares	(8)
Ending Balance \| shares	2,224
Weighted Average Exercise Price
Beginning Balance \| $ / shares	$ 15.43
Canceled/Forfeited \| $ / shares	15.43
Ending Balance \| $ / shares	$ 15.43

Shareholders' Equity - Additional Information (Detail) - USD ($)					1 Months Ended			3 Months Ended		5 Months Ended	6 Months Ended
	May 18, 2016	Apr. 01, 2016	Sep. 28, 2015	Apr. 01, 2015	Apr. 30, 2016	Dec. 31, 2015	Aug. 24, 2015	Aug. 01, 2015	Aug. 02, 2014	Jan. 30, 2016	Aug. 01, 2015	Aug. 02, 2014	Jul. 31, 2015
Stockholders Equity Note [Line Items]
Closing stock price													$ 12.44
Share repurchase program, shares repurchased								14,600,000			16,000,000
Share repurchase program, amount repurchased								$ 193,200,000			$ 215,300,000
Accrued share repurchases								$ 19,672,000			$ 19,672,000
Share repurchase program, cumulative shares repurchased								237,900,000			237,900,000
Share repurchase program, total amount of repurchases								$ 3,000,000,000			$ 3,000,000,000
Share repurchase program, remaining available for future share repurchases								$ 228,200,000			$ 228,200,000
Cash dividend declared per share								$ 0.06	$ 0.06		$ 0.12	$ 0.12
Employee Stock Purchase Plan, 2000 Restated Plan
Stockholders Equity Note [Line Items]
Unrecognized share based compensation cost								$ 44,200,000			$ 44,200,000
Employee stock purchase plan, shares issued								3,200,000	5,200,000		3,200,000	5,200,000
Employee stock purchase plan, weighted-average price								$ 11.88	$ 7.58		$ 11.88	$ 7.58
Subsequent Event
Stockholders Equity Note [Line Items]
Share repurchase program, shares repurchased							3,700,000			0
Share repurchase program, amount repurchased							$ 45,600,000
Share repurchase program, average price per share							$ 12.39
Cash dividend declared per share	$ 0.06		$ 0.06		$ 0.06	$ 0.06
Dividends declared, date to be paid	Jul. 12, 2016		Oct. 22, 2015
Dividends declared, date of record	Jun. 14, 2016		Oct. 08, 2015
Time Based Option Award
Stockholders Equity Note [Line Items]
Options vested and expected to vest, aggregate intrinsic value								$ 45,800,000			$ 45,800,000
Options vested and expected to vest, weighted average remaining contractual term (in years)											6 years
Options exercisable, aggregate intrinsic value								30,600,000			$ 30,600,000
Options exercisable, weighted average remaining contractual term (in years)											4 years 2 months 12 days
Aggregate intrinsic value of stock options exercised								2,500,000	$ 4,200,000		$ 8,800,000	$ 13,600,000
Unrecognized share based compensation cost								57,000,000			$ 57,000,000
Unrecognized share based compensation cost, weighted-average period of recognition											2 years 4 months 24 days
Market Based Option Award
Stockholders Equity Note [Line Items]
Options vested and expected to vest, aggregate intrinsic value								0			$ 0
Options vested and expected to vest, weighted average remaining contractual term (in years)											5 years 8 months 12 days
Performance Based Restricted Stock Unit
Stockholders Equity Note [Line Items]
Vested				360,723							658,000
Granted											669,000
Performance Based Restricted Stock Unit \| Executive Officer
Stockholders Equity Note [Line Items]
Vested				478,001
Granted				107,954
Performance Based Restricted Stock Unit \| Subsequent Event \| Executive Officer
Stockholders Equity Note [Line Items]
Vested		33,616
Restricted Stock Units (RSUs)
Stockholders Equity Note [Line Items]
Unrecognized share based compensation cost								103,600,000			$ 103,600,000
Unrecognized share based compensation cost, weighted-average period of recognition											1 year 4 months 24 days
Vested											5,259,000
Granted											5,949,000
Restricted stock units, aggregate intrinsic value								$ 126,100,000			$ 126,100,000
Restricted stock units vested and expected to vest								10,100,000			10,100,000
Financial Performance Restricted Stock Units \| Subsequent Event \| Executive Officer
Stockholders Equity Note [Line Items]
Vested		0

Activity Related to Non Vested Portion of Restricted Stock Units (Detail) - $ / shares		6 Months Ended
	Apr. 01, 2015	Aug. 01, 2015
Time Based Restricted Units
Restricted Stock Units Outstanding
Beginning Balance		9,748,000
Granted		4,873,000
Vested		(4,601,000)
Canceled/Forfeited		(409,000)
Ending Balance		9,611,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.84
Granted		13.66
Vested		15.30
Canceled/Forfeited		14.06
Ending Balance		$ 14.05
Performance Based Restricted Stock Unit
Restricted Stock Units Outstanding
Beginning Balance		1,254,000
Granted		669,000
Vested	(360,723)	(658,000)
Canceled/Forfeited		(227,000)
Ending Balance		1,038,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.99
Granted		14.08
Vested		15.15
Canceled/Forfeited		14.43
Ending Balance		$ 14.42
Market Based Restricted Stock Unit
Restricted Stock Units Outstanding
Granted		407,000
Canceled/Forfeited		(54,000)
Ending Balance		353,000
Weighted Average Grant Date Fair Value
Granted		$ 12.24
Canceled/Forfeited		12.24
Ending Balance		$ 12.24
Restricted Stock Units (RSUs)
Restricted Stock Units Outstanding
Beginning Balance		11,002,000
Granted		5,949,000
Vested		(5,259,000)
Canceled/Forfeited		(690,000)
Ending Balance		11,002,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.85
Granted		13.61
Vested		15.28
Canceled/Forfeited		13.09
Ending Balance		$ 14.03

Schedule of Cash Dividends (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Cash dividend
Cash dividend per share	$ 0.06	$ 0.06	$ 0.12	$ 0.12
Total payment to shareholders	$ 31,194	$ 30,820	$ 62,104	$ 60,992

Total Stock Compensation by Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 36,674	$ 35,020	$ 69,895	$ 64,989
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,012	1,733	3,559	4,032
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	27,808	24,276	52,589	44,644
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,707	2,617	5,284	5,545
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 4,147	$ 6,394	$ 8,463	$ 10,768

Share Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	Aug. 01, 2015	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation capitalized in inventory	$ 2.0	$ 1.5

Weighted Average Assumptions Used to Calculate Fair Value of Time Based Equity Award (Detail) - Time Based Option Award - $ / shares	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value	$ 3.97	$ 3.98	$ 3.98	$ 4.37
Expected volatility	34.00%	34.00%	34.00%	35.00%
Expected term (in years)	5 years 4 months 24 days	5 years	5 years 4 months 24 days	5 years
Risk-free interest rate	1.60%	1.70%	1.60%	1.60%
Expected dividend yield	1.70%	1.60%	1.70%	1.60%

Weighted Average Assumptions Used to Calculate Fair Value Awards for Employee Stock Purchase Plan (Detail) - Employee Stock Purchase Plan - $ / shares	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value	$ 3.78	$ 4.13
Volatility	31.00%	32.00%
Expected term (in years)	1 year 3 months 18 days	1 year 3 months 18 days
Risk-free interest rate	0.40%	0.20%
Dividend yield	1.70%	1.60%

Weighted Average Assumptions Used to Calculate Fair Value Awards of Total Shareholder Return Awards (Detail) - Total Shareholder Return	6 Months Ended
	Aug. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years
Expected volatility	27.00%
Average correlation coefficient of peer companies	0.40%
Risk-free interest rate	0.50%
Expected dividend yield	1.70%

Related Party Transactions - Additional Information (Detail) - Chief Executive Officer - USD ($) $ in Millions	6 Months Ended
	Aug. 01, 2015	Feb. 28, 2015
Related Party Transaction [Line Items]
Amount of transactions with related parties	$ 8.4
Liability to related party	$ 7.0	$ 15.4

Subsequent Events - Additional Information (Detail) $ in Millions		1 Months Ended		3 Months Ended	6 Months Ended
	Feb. 16, 2016 USD ($)	Apr. 30, 2016 USD ($) Director	Feb. 29, 2016 USD ($)	Aug. 01, 2015 USD ($)	Aug. 01, 2015 USD ($)
Subsequent Event \| Starboard Value LP
Subsequent Event [Line Items]
Number of independent directors \| Director		4
Settlement Agreement and Patent License \| Subsequent Event
Subsequent Event [Line Items]
Litigation settlement, amount	$ 750.0	$ 750.0
Litigation Settlement amount paid		$ 750.0
Carnegie Mellon Litigation \| Mutual release of claims and covenant not to sue provisions \| Operating Expense
Subsequent Event [Line Items]
Litigation settlement, amount				$ 654.7	$ 654.7
Carnegie Mellon Litigation \| Future license settlement
Subsequent Event [Line Items]
License expiration period					Through April 2018.
Carnegie Mellon Litigation \| License Fees \| Cost of goods sold
Subsequent Event [Line Items]
Litigation settlement, amount				81.3
Carnegie Mellon Litigation \| License Fees \| Cost of Goods Sold for Past Use
Subsequent Event [Line Items]
Litigation settlement, amount				78.9	$ 78.9
Carnegie Mellon Litigation \| License Fees \| Remaining Cost of Goods Sold
Subsequent Event [Line Items]
Litigation settlement, amount				$ 2.4	$ 2.4
Carnegie Mellon Litigation \| Subsequent Event \| Mutual release of claims and covenant not to sue provisions
Subsequent Event [Line Items]
Litigation settlement, amount			$ 654.7
Carnegie Mellon Litigation \| Subsequent Event \| Licensing of intellectual property
Subsequent Event [Line Items]
Litigation settlement, amount			81.3
Carnegie Mellon Litigation \| Subsequent Event \| Future license settlement
Subsequent Event [Line Items]
Litigation settlement, amount			$ 14.0