Semtech (SMTC) 10-Q 2 Dec 20 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Oct. 25, 2020	Nov. 27, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 25, 2020
Document Transition Report	false
Contained File Information, File Number	001-06395
Entity Registrant Name	SEMTECH CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-2119684
Entity Address, Address Line One	200 Flynn Road
Entity Address, City or Town	Camarillo
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	93012-8790
City Area Code	805
Local Phone Number	498-2111
Title of 12(b) Security	Common Stock par value $0.01 per share
Trading Symbol	SMTC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		65,003,286
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000088941
Current Fiscal Year End Date	--01-31

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Income Statement [Abstract]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511
Cost of sales	60,021	54,763	167,371	157,104
Gross profit	94,061	86,248	263,073	252,407
Operating costs and expenses:
Selling, general and administrative	42,891	37,777	115,746	120,074
Product development and engineering	27,890	26,976	84,696	80,012
Intangible amortization	1,798	3,770	6,658	12,821
Changes in the fair value of contingent earn-out obligations	0	(152)	(33)	(2,313)
Total operating costs and expenses	72,579	68,371	207,067	210,594
Operating income	21,482	17,877	56,006	41,813
Interest expense	(1,008)	(2,183)	(3,819)	(7,247)
Non-operating (expense) income, net	(236)	644	11	2,900
Investment impairments and credit loss reserves	(335)	0	(5,450)	0
Income before taxes and equity in net gains of equity method investments	19,903	16,338	46,748	37,466
Provision for income taxes	1,580	2,693	2,523	8,638
Net income before equity in net gains of equity method investments	18,323	13,645	44,225	28,828
Equity in net gains of equity method investments	159	352	11	109
Net income	18,482	13,997	44,236	28,937
Net loss attributable to noncontrolling interest	(5)	0	(11)	0
Net income attributable to common stockholders	$ 18,487	$ 13,997	$ 44,247	$ 28,937
Earnings per share:
Basic (in dollars per share)	$ 0.28	$ 0.21	$ 0.68	$ 0.44
Diluted (in dollars per share)	$ 0.28	$ 0.21	$ 0.67	$ 0.43
Weighted-average number of shares used in computing earnings per share:
Basic (in shares)	65,136	66,387	65,270	66,337
Diluted (in shares)	65,967	67,318	66,050	67,630

Condensed Consolidated Statem_2

Condensed Consolidated Statements Of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Net income	$ 18,482	$ 13,997	$ 44,236	$ 28,937
Other comprehensive income (loss), net:
Unrealized gain on available-for-sale securities	0	195	386	195
Reclassification of realized gain on available-for-sale securities, net to net income	0	0	(757)	0
Change in defined benefit plans, net	202	68	581	204
Other comprehensive income (loss), net:	222	426	(953)	292
Comprehensive income	18,704	14,423	43,283	29,229
Comprehensive loss attributable to noncontrolling interest	(5)	0	(11)	0
Comprehensive income attributable to common stockholders	18,709	14,423	43,294	29,229
Foreign Exchange Contract
Other comprehensive income (loss), net:
Unrealized gain (loss) on cash flow hedges, net	173	30	531	(249)
Reclassifications of realized (gain) loss on cash flow hedges, net to net income	(244)	133	(238)	142
Interest Rate Swap
Other comprehensive income (loss), net:
Unrealized gain (loss) on cash flow hedges, net	(82)	0	(1,702)	0
Reclassifications of realized (gain) loss on cash flow hedges, net to net income	$ 173	$ 0	$ 246	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Current assets:
Cash and cash equivalents	$ 262,271	$ 293,324
Accounts receivable, less allowances of $586 and $633, respectively	58,700	61,927
Inventories	78,367	73,010
Prepaid taxes	22,677	10,718
Other current assets	25,731	21,757
Total current assets	447,746	460,736
Non-current assets:
Property, plant and equipment, net of accumulated depreciation of $229,514 and $214,787, respectively	127,472	124,418
Deferred tax assets	24,983	20,094
Goodwill	351,141	351,141
Other intangible assets, net	13,354	20,012
Other assets	83,276	76,032
TOTAL ASSETS	1,047,972	1,052,433
Current liabilities:
Accounts payable	47,338	48,009
Accrued liabilities	58,535	50,632
Total current liabilities	105,873	98,641
Non-current liabilities:
Deferred tax liabilities	877	3,600
Long term debt	183,075	194,743
Other long-term liabilities	81,521	78,249
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.01 par value, 250,000,000 shares authorized, 78,136,144 issued and 64,966,293 outstanding and 78,136,144 issued and 65,758,115 outstanding, respectively	785	785
Treasury stock, at cost, 13,169,851 shares and 12,378,029 shares, respectively	(438,246)	(387,851)
Additional paid-in capital	465,431	458,579
Retained earnings	655,540	611,607
Accumulated other comprehensive loss	(7,119)	(6,166)
Total stockholders’ equity	676,391	676,954
Noncontrolling interest	235	246
Total equity	676,626	677,200
TOTAL LIABILITIES AND EQUITY	$ 1,047,972	$ 1,052,433

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 586	$ 633
Accumulated depreciation	$ 229,514	$ 214,787
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	78,136,144	78,136,144
Common stock, shares outstanding (in shares)	64,966,293	65,758,115
Treasury stock (in shares)	13,169,851	12,378,029

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period Of Adoption, Adjustment	Common Stock	Treasury Stock, at Cost	Additional Paid-in Capital	Retained Earnings	Retained EarningsCumulative Effect, Period Of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Stockholders’ Equity	Stockholders’ EquityCumulative Effect, Period Of Adoption, Adjustment	Noncontrolling Interest
Beginning balance (in shares) at Jan. 27, 2019			65,238,255
Beginning balance at Jan. 27, 2019	$ 682,580		$ 785	$ (346,218)	$ 451,884	$ 579,736		$ (3,607)	$ 682,580		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,937					28,937			28,937
Other comprehensive income (loss)	292							292	292
Capital contribution from outside party to a consolidated subsidiary	251										251
Share-based compensation	36,910				36,910				36,910
Repurchase of common stock (in shares)			(925,743)
Repurchase of common stock	(42,636)			(42,636)					(42,636)
Treasury stock reissued (in shares)			1,888,870
Treasury stock reissued	(16,068)			27,014	(43,082)				(16,068)
Ending balance (in shares) at Oct. 27, 2019			66,201,382
Ending balance at Oct. 27, 2019	690,266		$ 785	(361,840)	445,712	608,673		(3,315)	690,015		251
Beginning balance (in shares) at Jul. 28, 2019			66,314,933
Beginning balance at Jul. 28, 2019	690,149		$ 785	(345,809)	444,238	594,676		(3,741)	690,149		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,997					13,997			13,997
Other comprehensive income (loss)	426							426	426
Capital contribution from outside party to a consolidated subsidiary	251										251
Share-based compensation	13,591				13,591				13,591
Repurchase of common stock (in shares)			(477,262)
Repurchase of common stock	(22,526)			(22,526)					(22,526)
Treasury stock reissued (in shares)			363,711
Treasury stock reissued	(5,622)			6,495	(12,117)				(5,622)
Ending balance (in shares) at Oct. 27, 2019			66,201,382
Ending balance at Oct. 27, 2019	$ 690,266		$ 785	(361,840)	445,712	608,673		(3,315)	690,015		251
Accounting Standards Update	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Jan. 26, 2020	65,758,115		65,758,115
Beginning balance at Jan. 26, 2020	$ 677,200	$ (314)	$ 785	(387,851)	458,579	611,607	$ (314)	(6,166)	676,954	$ (314)	246
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	44,236					44,247			44,247		(11)
Other comprehensive income (loss)	(953)							(953)	(953)
Share-based compensation	34,757				34,757				34,757
Repurchase of common stock (in shares)			(1,527,834)
Repurchase of common stock	(66,433)			(66,433)					(66,433)
Treasury stock reissued (in shares)			736,012
Treasury stock reissued	$ (11,867)			16,038	(27,905)				(11,867)
Ending balance (in shares) at Oct. 25, 2020	64,966,293		64,966,293
Ending balance at Oct. 25, 2020	$ 676,626		$ 785	(438,246)	465,431	655,540		(7,119)	676,391		235
Beginning balance (in shares) at Jul. 26, 2020			65,019,501
Beginning balance at Jul. 26, 2020	677,733		$ 785	(424,095)	471,091	637,053		(7,341)	677,493		240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,482					18,487			18,487		(5)
Other comprehensive income (loss)	222							222	222
Share-based compensation	12,333				12,333				12,333
Repurchase of common stock (in shares)			(439,921)
Repurchase of common stock	(24,046)			(24,046)					(24,046)
Treasury stock reissued (in shares)			386,713
Treasury stock reissued	$ (8,098)			9,895	(17,993)				(8,098)
Ending balance (in shares) at Oct. 25, 2020	64,966,293		64,966,293
Ending balance at Oct. 25, 2020	$ 676,626		$ 785	$ (438,246)	$ 465,431	$ 655,540		$ (7,119)	$ 676,391		$ 235

Condensed Consolidated Statem_3

Condensed Consolidated Statements Of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019
Cash flows from operating activities:
Net income	$ 44,236	$ 28,937
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,207	30,270
Investment impairments and credit loss reserves	5,450	0
Accretion of deferred financing costs and debt discount	362	365
Deferred income taxes	(7,121)	422
Share-based compensation	36,103	37,458
(Gain) loss on disposition of assets	(20)	292
Changes in the fair value of contingent earn-out obligations	(33)	(2,313)
Equity in net gains of equity method investments	(11)	(109)
Corporate owned life insurance, net	4,197	3,358
Changes in assets and liabilities:
Accounts receivable, net	3,227	17,779
Inventories	(5,357)	(6,429)
Other assets	(15,109)	(2,663)
Accounts payable	157	(8,592)
Accrued liabilities	1,992	(21,126)
Income taxes payable	0	(2,105)
Other liabilities	(604)	(2,183)
Net cash provided by operating activities	91,676	73,361
Cash flows from investing activities:
Proceeds from sales of property, plant and equipment	20	329
Purchase of property, plant and equipment	(21,808)	(20,409)
Purchase of investments	(10,938)	(9,592)
Proceeds from sale of investments	327	0
Net cash used in investing activities	(32,399)	(29,672)
Cash flows from financing activities:
Payments of term loans	0	(14,062)
Payments of revolving line of credit	(12,000)	0
Deferred financing costs	(30)	0
Payments of earn-out	0	(237)
Payment for employee share-based compensation payroll taxes	(16,957)	(20,514)
Proceeds from exercise of stock options	5,090	4,446
Repurchase of common stock	(66,433)	(42,636)
Contributions from noncontrolling interest	0	251
Net cash used in financing activities	(90,330)	(72,752)
Net decrease in cash and cash equivalents	(31,053)	(29,063)
Cash and cash equivalents at beginning of period	293,324	312,120
Cash and cash equivalents at end of period	262,271	283,057
Supplemental disclosure of cash flow information:
Interest paid	4,976	6,641
Income taxes paid	8,086	8,531
Non-cash investing and financing activities:
Accounts payable related to capital expenditures	$ 3,419	$ 1,157

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Oct. 25, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Nature of Business Semtech Corporation (together with its consolidated subsidiaries, the "Company" or "Semtech") is a leading global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms. The end customers for the Company’s products are primarily original equipment manufacturers ("OEMs") that produce and sell electronics. Fiscal Year The Company reports results on the basis of 52 and 53-week periods and ends its fiscal year on the last Sunday in January. The other quarters generally end on the last Sunday of April, July and October. All quarters consist of 13 weeks except for one 14-week period in the fourth quarter of 53-week years. The third quarters of fiscal years 2021 and 2020 each consisted of 13 weeks. Principles of Consolidation The accompanying interim unaudited condensed consolidated financial statements have been prepared by the Company, in accordance with accounting principles generally accepted in the United States ("GAAP") and on the same basis as the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 26, 2020 ("Annual Report"). The Company’s interim unaudited condensed consolidated statements of income are referred to herein as the "Statements of Income." The Company’s interim unaudited condensed consolidated balance sheets are referred to herein as the "Balance Sheets" and interim unaudited condensed consolidated statements of cash flows as the "Statements of Cash Flows." In the opinion of the Company, these interim unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, the financial position of the Company for the interim periods presented. All intercompany balances have been eliminated. Because the interim unaudited condensed consolidated financial statements do not include all of the information and notes required by GAAP for a complete set of consolidated financial statements, they should be read in conjunction with the audited consolidated financial statements and notes included in the Company's Annual Report. The results reported in these interim unaudited condensed consolidated financial statements should not be regarded as indicative of results that may be expected for any subsequent period or for the entire year. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Correction of Immaterial Errors During the fourth quarter of fiscal year 2020, management identified certain immaterial errors related to share-based compensation expense of market-condition awards granted during fiscal years 2018, 2019 and 2020. The errors resulted from adjustments to the grant date fair value of the market-condition awards that were incorrectly accounted for as performance-based awards. The Company has corrected its consolidated financial statements for these errors for the impacted prior periods presented in this Quarterly Report on Form 10-Q. Refer to Note 16 for a discussion of the Company's assessment of the errors and impact on its consolidated financial statements. Recently Adopted Accounting Guidance In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-13, Financial Instruments–Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. This guidance requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. It also requires credit losses on available-for-sale debt securities to be presented as an allowance, rather than reducing the carrying amount. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years. The Company adopted ASU 2016-13 In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as interbank offered rates and London Interbank Offered Rate (“LIBOR”). The guidance includes practical expedients for contract modifications due to reference rate reform. Generally, contract modifications related to reference rate reform may be considered an event that does not require remeasurement or reassessment of a previous accounting determination at the modification date. This guidance is effective immediately and is only available through December 31, 2022. The Company adopted this guidance in the third quarter of fiscal year 2021 and there was no impact on its consolidated financial statements. Accounting Guidance Issued, but not yet Adopted as of October 25, 2020 In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes, which modifies Accounting Standards Codification ("ASC") 740 to simplify the accounting for income taxes. This guidance impacts the accounting for hybrid tax regimes, the tax basis step-up in goodwill obtained in a transaction that is not a business combination, separate financial statements of legal entities not subject to tax, the intraperiod tax allocation exception to the incremental approach, ownership changes in investments from a subsidiary to an equity method investment and vice versa, interim period accounting for enacted changes in tax law and the year-to-date loss limitation in interim period tax accounting. This guidance is effective for fiscal years beginning after December 15, 2020, and interim periods within this those fiscal years, with early adoption permitted. The Company will adopt this guidance in the first quarter of fiscal year 2022 and is still evaluating the impact on its consolidated financial statements.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Oct. 25, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings per Share The computation of basic and diluted earnings per common share was as follows: Three Months Ended Nine Months Ended (in thousands, except per share data) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Net income attributable to common stockholders $ 18,487 $ 13,997 $ 44,247 $ 28,937 Weighted-average common shares outstanding–basic 65,136 66,387 65,270 66,337 Dilutive effect of share-based compensation 831 931 780 1,293 Weighted-average common shares outstanding–diluted 65,967 67,318 66,050 67,630 Basic earnings per common share $ 0.28 $ 0.21 $ 0.68 $ 0.44 Diluted earnings per common share $ 0.28 $ 0.21 $ 0.67 $ 0.43 Anti-dilutive shares not included in the above calculations 523 237 274 223 Diluted earnings per common share incorporates the incremental shares issuable, calculated using the treasury stock method, upon the assumed exercise of non-qualified stock options and the vesting of restricted stock units and market-condition restricted stock unit awards if certain conditions have been met, but excludes such incremental shares that would have an anti-dilutive effect.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Oct. 25, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share-Based Compensation	Share-Based Compensation Financial Statement Effects and Presentation Pre-tax share-based compensation was included in the Statements of Income as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Cost of sales $ 654 $ 552 $ 1,734 $ 1,381 Selling, general and administrative 9,404 9,323 24,864 27,794 Product development and engineering 3,480 3,180 9,505 8,283 Total share-based compensation $ 13,538 $ 13,055 $ 36,103 $ 37,458 Total Stockholder Return ("TSR") Market-Condition Restricted Stock Units The Company grants TSR market-condition restricted stock units (the "TSR Awards") to certain executives of the Company. The TSR Awards have a pre-defined market-condition, which determines the number of shares that ultimately vest, as well as a service condition. The TSR Awards are valued as of the measurement date using a Monte Carlo simulation which takes into consideration the possible outcomes pertaining to the TSR market condition and expense is recognized on a straight line basis over the vesting periods and is adjusted for any actual forfeitures. In the nine months ended October 25, 2020, the Company granted 137,224 TSR Awards, which are accounted for as equity awards. The market condition is determined based upon the Company’s TSR benchmarked against the TSR of the S&P SPDR Semiconductor ETF (NYSE:XSD) over one two three During the fourth quarter of fiscal year 2020, management identified certain immaterial errors related to share-based compensation expense of market-condition awards granted during fiscal years 2018, 2019 and 2020. The impact of the errors was not material and the Company has corrected the consolidated financial statements and all other financial information presented in this Quarterly Report on Form 10-Q. Refer to Note 16 for a discussion of the Company's assessment of the errors and impact on its consolidated financial statements. Restricted Stock Units, Employees The Company grants restricted stock units to certain employees, which are expected to be settled with shares of the Company's common stock. The grant date for these awards is equal to the measurement date. These awards are valued as of the measurement date, based on the fair value of the Company's common stock at the grant date, and recognized as share-based compensation expense over the requisite vesting period (typically 4 years). In the nine months ended October 25, 2020, the Company granted 822,162 restricted stock units to employees. Restricted Stock Units, Non-Employee Directors The Company maintains a compensation program pursuant to which restricted stock units are granted to the Company’s directors that are not employed by the Company or any of its subsidiaries. Under the Company's director compensation program, a portion of the restricted stock units granted under the program will be settled in cash and a portion will be settled in shares of the Company's common stock. Restricted stock units awarded under the program are scheduled to vest on the earlier of (i) one year after the grant date or (ii) the day immediately preceding the annual meeting of stockholders in the year following the grant. The portion of a restricted stock unit award under the program that is to be settled in cash will, subject to vesting, be settled when the director who received the award separates from the board of directors. The portion of a restricted stock unit award under the program that is to be settled in shares of the Company's common stock will, subject to vesting, be settled promptly following vesting. In the nine months ended October 25, 2020, the Company granted 14,742 restricted stock units that settle in cash and 12,898 restricted stock units that settle in shares.

Available-for-sale securities

Available-for-sale securities	9 Months Ended
	Oct. 25, 2020
Investments [Abstract]
Available-for-sale securities	Available-for-sale securities The following table summarizes the values of the Company’s available-for-sale securities: October 25, 2020 January 26, 2020 (in thousands) Fair Value Amortized Gross Fair Value Amortized Gross Convertible debt $ 11,233 $ 11,968 $ (735) $ 10,700 $ 8,715 $ 1,985 Total available-for-sale securities $ 11,233 $ 11,968 $ (735) $ 10,700 $ 8,715 $ 1,985 The following table summarizes the maturities of the Company’s available-for-sale securities: October 25, 2020 January 26, 2020 (in thousands) Fair Value Amortized Cost Fair Value Amortized Cost Within 1 year $ 9,829 $ 9,920 $ 10,200 $ 8,215 After 1 year through 5 years 1,404 2,048 500 500 Total available-for-sale securities $ 11,233 $ 11,968 $ 10,700 $ 8,715 The Company's available-for-sale securities consist of investments in convertible debt instruments issued by privately-held companies. The available-for-sale securities with maturities within one year were included in "Other current assets" and with maturities greater than one year were included in "Other assets" in the Balance Sheets.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 25, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following fair value hierarchy is applied for disclosure of the inputs used to measure fair value and prioritizes the inputs into three levels as follows: Level 1 —Quoted prices in active markets for identical assets or liabilities. Level 2 —Observable inputs other than Level 1 prices, such as quoted prices for similar assets and liabilities in active markets or other inputs that are observable for the assets or liabilities, either directly or indirectly. Level 3 —Unobservable inputs based on the Company’s own assumptions, requiring significant management judgment or estimation. Instruments Measured at Fair Value on a Recurring Basis Financial assets and liabilities measured and recorded at fair value on a recurring basis were presented in the Balance Sheets as follows: Fair Value as of October 25, 2020 Fair Value as of January 26, 2020 (in thousands) Total (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Financial assets: Convertible debt $ 11,233 $ — $ — $ 11,233 $ 10,700 $ — $ — $ 10,700 Foreign currency forward contracts 377 — 377 — — — — — Total financial assets $ 11,610 $ — $ 377 $ 11,233 $ 10,700 $ — $ — $ 10,700 Financial liabilities: Cycleo Earn-out $ — $ — $ — $ — $ 2,108 $ — $ — $ 2,108 Interest rate swap agreement 1,854 — 1,854 — — — — — Total financial liabilities $ 1,854 $ — $ 1,854 $ — $ 2,108 $ — $ — $ 2,108 During the nine months ended October 25, 2020, the Company had no transfers of financial assets or liabilities between Level 1 or Level 2. During April 2020, the Cycleo Earn-out (as defined in Note 11) period ended, and the Cycleo Earn-out liability was transferred out of Level 3. Subsequent to the earn-out period, the Cycleo Earn-out liability is not measured at fair value on a recurring basis and instead, it is measured based on a combination of certain sales and operating income results achieved during the earn-out period (see Note 11). During the nine months ended October 25, 2020, there were no other transfers of financial assets or liabilities into or out of Level 3. As of October 25, 2020 and January 26, 2020, the Company had not elected the fair value option for any financial assets and liabilities for which such an election would have been permitted. The following table presents a reconciliation of the changes in the earn-out liability categorized within Level 3 in the nine months ended October 25, 2020: (in thousands) Balance at January 26, 2020 $ 2,108 Changes in fair value of contingent earn-out obligations (33) Changes in fair value of non-contingent earn-out obligations (117) Transferred out of Level 3 (1,958) Balance at October 25, 2020 $ — The convertible debt investments are valued utilizing a combination of estimates that are based on the estimated discounted cash flows associated with the debt and the fair value of the equity into which the debt may be converted, all of which are Level 3 inputs. The following table presents a reconciliation of the changes in the convertible debt investments in the nine months ended October 25, 2020: (in thousands) Balance at January 26, 2020 $ 10,700 Additions 2,500 Increase in credit loss reserve (2,719) Interest accrued 752 Balance at October 25, 2020 $ 11,233 The foreign currency forward contracts are valued using readily available foreign currency forward and interest rate curves (Level 2 inputs). The fair value of each contract is determined by comparing the contract rate to the forward rate and discounting to the present value. Contracts in a gain position are recorded in "Other current assets" in the Balance Sheets and the value of contracts in a loss position are recorded in "Accrued liabilities" in the Balance Sheets. See Note 15 for further discussion of the Company’s derivative instruments. The interest rate swap agreement is valued using readily available interest rate curves (Level 2 inputs). The fair value of the agreement is determined by comparing, for each settlement, the contract rate to the forward rate and discounting to the present value. Contracts in a gain position are recorded in "Other current assets" and "Other assets" in the Balance Sheets and the value of contracts in a loss position are recorded in "Accrued liabilities" and "Other long term liabilities" in the Balance Sheets. See Note 15 for further discussion of the Company’s derivative instruments. Instruments Not Recorded at Fair Value on a Recurring Basis Some of the Company’s financial instruments are not measured at fair value on a recurring basis, but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents including money market deposits, net receivables, certain other assets, accounts payable, accrued expenses, accrued personnel costs, and other current liabilities. The Company’s long-term debt is recorded at cost, which approximates fair value as the long-term debt bears interest at a floating rate. Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis The Company reduces the carrying amounts of its goodwill, intangible assets, long-lived assets and non-marketable equity securities to fair value when held for sale or determined to be impaired. Investment Impairments and Credit Loss Reserves Upon the adoption of ASU 2016-13

Inventories

Inventories	9 Months Ended
	Oct. 25, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or net realizable value and consisted of the following: (in thousands) October 25, 2020 January 26, 2020 Raw materials $ 3,054 $ 2,223 Work in progress 55,439 50,640 Finished goods 19,874 20,147 Inventories $ 78,367 $ 73,010

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Oct. 25, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The carrying amounts of goodwill by applicable reporting unit were as follows: (in thousands) Signal Integrity Wireless and Sensing Protection Total Balance at January 26, 2020 $ 274,085 $ 72,128 $ 4,928 $ 351,141 Balance at October 25, 2020 $ 274,085 $ 72,128 $ 4,928 $ 351,141 Goodwill is not amortized, but is tested for impairment at the reporting unit level using either a qualitative or quantitative assessment on an annual basis during the fourth quarter of each fiscal year, and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The recoverability of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit. As of October 25, 2020, there was no indication of impairment of the Company's goodwill balances. Purchased Intangibles The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions, which are amortized over their estimated useful lives: October 25, 2020 January 26, 2020 (in thousands, except estimated useful life) Estimated Gross Accumulated Net Carrying Gross Accumulated Net Carrying Core technologies 3-8 years $ 43,300 $ (29,946) $ 13,354 $ 82,857 $ (63,434) $ 19,423 Customer relationships — — — 6,000 (5,411) 589 Total finite-lived intangible assets $ 43,300 $ (29,946) $ 13,354 $ 88,857 $ (68,845) $ 20,012 Amortization expense of finite-lived intangible assets recorded in the Statements of Income for each period was as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Core technologies $ 1,798 $ 3,337 $ 6,069 $ 10,971 Customer relationships — 433 589 1,850 Total amortization expense $ 1,798 $ 3,770 $ 6,658 $ 12,821 Future amortization expense of finite-lived intangible assets is expected as follows: (in thousands) Fiscal Year Ending: Fiscal year 2021 (remaining three months) $ 1,608 Fiscal year 2022 4,942 Fiscal year 2023 4,002 Fiscal year 2024 1,676 Fiscal year 2025 288 Thereafter 838 Total expected amortization expense $ 13,354

Long-Term Debt

Long-Term Debt	9 Months Ended
	Oct. 25, 2020
Debt Instruments [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt and the current period interest rates were as follows: Balance as of (in thousands, except percentages) October 25, 2020 January 26, 2020 Revolving loans $ 185,000 $ 197,000 Debt issuance costs (1,925) (2,257) Total long-term debt, net of debt issuance costs $ 183,075 $ 194,743 Effective interest rate (1) 1.87 % 2.95 % (1) The revolving loans bear interest at a variable rate based on LIBOR or a Base Rate, at the Company’s option, plus an applicable margin that varies based on the Company’s consolidated leverage ratio. In the first quarter of fiscal year 2021, the Company entered into an interest rate swap agreement that fixed the interest on the first $150.0 million of debt outstanding under the revolving loans at 1.9775%. As of October 25, 2020, the effective interest rate is a weighted-average rate that represents interest on the first $150.0 million of the debt outstanding at a fixed LIBOR rate of 0.7275% plus a margin of 1.25% (total fixed rate of 1.9775%), and the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.15% as of October 25, 2020, plus a margin of 1.25% (total variable rate of 1.40%). As of January 26, 2020, the interest rate was a variable rate based on the one-month LIBOR rate, which was 1.7% as of January 26, 2020, plus a margin of 1.25% (total variable rate of 2.95%). On November 7, 2019, the Company, with certain of its domestic subsidiaries as guarantors, entered into an amended and restated credit agreement with the lenders party thereto and HSBC Bank USA, National Association, as administrative agent, swing line lender and letter of credit issuer in order to provide a more flexible borrowing structure by expanding the borrowing capacity of the revolving loans under the senior secured first lien credit facility (the "Credit Facility") to $600.0 million, eliminating the term loans under the prior facility and extending the maturity to November 7, 2024. As of October 25, 2020, the Company had $185.0 million outstanding under its Credit Facility, which had $415.0 million of undrawn borrowing capacity, and the Company was in compliance with the financial covenants required under the Credit Facility. Interest expense was comprised of the following components for the periods presented: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Contractual interest (1) $ 888 $ 2,064 $ 3,457 $ 6,881 Amortization of debt discount and issuance costs 120 119 362 366 Total interest expense $ 1,008 $ 2,183 $ 3,819 $ 7,247 (1) Contractual interest represents the interest on the Company's outstanding debt after giving effect to the interest rate swap agreement. As of October 25, 2020, there were no amounts outstanding under the letters of credit, swing line loans and alternative currency sub-facilities.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 25, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective tax rate differs from the statutory federal income tax rate of 21% primarily due to the regional mix of income, return-to-provision adjustments, excess tax benefits from share-based compensation, withholding taxes on certain foreign earnings and research and development tax credits. The Company uses a two-step approach to recognize and measure uncertain tax positions ("UTP"). The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained in audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (before the federal impact of state items) is as follows: (in thousands) Balance at January 26, 2020 $ 25,466 Additions/(decreases) based on tax positions related to the current fiscal year 278 Additions/(decreases) based on tax positions related to the prior fiscal years 1,240 Balance at October 25, 2020 $ 26,984 Included in the balance of gross unrecognized tax benefits at October 25, 2020 and January 26, 2020 are $9.9 million and $8.6 million, respectively, of net tax benefits (after the federal impact of state items), that, if recognized, would impact the effective tax rate, prior to consideration of any required valuation allowance. The liability for UTP is reflected in the Balance Sheets as follows: (in thousands) October 25, 2020 January 26, 2020 Deferred tax assets - non-current $ 15,736 $ 15,575 Other long-term liabilities 9,903 8,555 Total accrued taxes $ 25,639 $ 24,130 The Company’s policy is to include net interest and penalties related to unrecognized tax benefits in the "Provision for income taxes" in the Statements of Income. Tax years prior to 2013 (the Company’s fiscal year 2014) are generally not subject to examination by the U.S. Internal Revenue Service except for items involving tax attributes that have been carried forward to tax years whose statute of limitations remains open. For state returns, the Company is generally not subject to income tax examinations for calendar years prior to 2012 (the Company’s fiscal year 2013). The Company has a significant tax presence in Switzerland for which Swiss tax filings have been examined through fiscal year 2019. The Company is also subject to routine examinations by various foreign tax jurisdictions in which it operates. The Company believes that adequate provisions have been made for any adjustments that may result from tax examinations. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with the Company's expectations, the Company could be required to adjust its provision for income taxes in the period such resolution occurs. The Company’s regional income (loss) from continuing operations before taxes and equity in net gains of equity method investments was as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Domestic $ (2,054) $ (1,845) $ (19,065) $ (20,907) Foreign 21,957 18,183 65,813 58,373 Total $ 19,903 $ 16,338 $ 46,748 $ 37,466

Leases

Leases	9 Months Ended
	Oct. 25, 2020
Leases [Abstract]
Leases	Leases The Company has operating leases for real estate, vehicles, and office equipment. Real estate leases are used to secure office space for the Company's administrative, engineering, production support and manufacturing activities. The Company's leases have remaining lease terms of up to approximately 10 years, some of which include options to extend the leases for up to 5 years, and some of which include options to terminate the leases within 1 year. The components of lease expense were as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Operating lease cost $ 1,178 $ 1,183 $ 3,533 $ 3,610 Short-term lease cost — 81 — 242 Sublease income (35) (33) (102) (98) Total lease cost $ 1,143 $ 1,231 $ 3,431 $ 3,754 Supplemental cash flow information related to leases was as follows: Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 3,546 $ 3,874 Right-of-use assets obtained in exchange for new operating lease liabilities $ 4,119 $ 149 October 25, 2020 Weighted-average remaining lease term–operating leases 4.53 years Weighted-average discount rate on remaining lease payments–operating leases 6.8 % Supplemental balance sheet information related to leases was as follows: Balance as of (in thousands) October 25, 2020 January 26, 2020 Operating lease right-of-use assets in "Other assets" $ 12,159 $ 10,958 Operating lease liabilities in "Accrued liabilities" $ 3,643 $ 3,273 Operating lease liabilities in "Other long-term liabilities" 9,114 8,185 Total operating lease liabilities $ 12,757 $ 11,458 Maturities of lease liabilities as of October 25, 2020 are as follows: (in thousands) Fiscal Year Ending: 2021 (remaining three months) $ 1,241 2022 4,078 2023 2,639 2024 2,231 2025 2,103 Thereafter 2,611 Total lease payments 14,903 Less: imputed interest (2,146) Total $ 12,757 As of October 25, 2020, we have entered into two additional operating leases with a total of $4.5 million lease liabilities that have not been recorded on our consolidated financial statements because the leases had not commenced as of the end of the third quarter of fiscal year 2021. Subsequent to October 25, 2020, both leases have commenced and have lease terms of 10 years.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 25, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In accordance with ASC 450-20, Loss Contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated. The Company also discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for its consolidated financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote. The Company evaluates, at least quarterly, developments in its legal matters that could affect the amount of liability that has been previously accrued, and makes adjustments as appropriate. Significant judgment is required to determine both probability and the estimated amount. The Company may be unable to estimate a possible loss or range of possible loss due to various reasons, including, among others: (i) if the damages sought are indeterminate; (ii) if the proceedings are in early stages, (iii) if there is uncertainty as to the outcome of pending appeals, motions or settlements, (iv) if there are significant factual issues to be determined or resolved, and (v) if there are novel or unsettled legal theories presented. In such instances, there is considerable uncertainty regarding the ultimate resolution of such matters, including a possible eventual loss, if any. Because the outcomes of litigation and other legal matters are inherently unpredictable, the Company’s evaluation of legal matters or proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. While the consequences of certain unresolved matters and proceedings are not presently determinable, and an estimate of the probable and reasonably possible loss or range of loss in excess of amounts accrued for such proceedings cannot be reasonably made, an adverse outcome from such proceedings could have a material adverse effect on the Company’s earnings in any given reporting period. However, in the opinion of management, after consulting with legal counsel, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s consolidated financial statements, as a whole. However, legal matters are inherently unpredictable and subject to significant uncertainties, some of which are beyond the Company’s control. As such, even though the Company intends to vigorously defend itself with respect to its legal matters, there can be no assurance that the final outcome of these matters will not materially and adversely affect the Company’s business, financial condition, operating results, or cash flows. From time to time, the Company is involved in various claims, litigation, and other legal actions that are normal to the nature of its business, including with respect to intellectual property, contract, product liability, employment, and environmental matters. In the opinion of management, after consulting with legal counsel, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s consolidated financial statements, as a whole. Settlement On August 1, 2018, the Company announced the settlement of a lawsuit filed against HiLight Semiconductor Limited and related individual defendants in accordance with which the Company was paid approximately $9.0 million to cover damages for claims, costs and attorneys' fees. The Company recorded gains of $8.0 million during fiscal year 2019 and $1.0 million in the first quarter of fiscal year 2020 for recoveries related to this settlement. All recoveries were presented in "Selling, general and administrative" ("SG&A") expense in the Statements of Income in the respective periods in which the cash was received. The Company’s currently pending legal matters of note are discussed below: Environmental Matters The Company vacated a former facility in Newbury Park, California in 2002, but continues to address groundwater and soil contamination at the site. The Company’s efforts to address site conditions have been at the direction of the Los Angeles Regional Water Quality Control Board (“RWQCB”). In October 2013, an order was issued including a scope of proposed additional site work, monitoring, and remediation activities. The Company has been complying with RWQCB orders and direction, and continues to implement an approved remedial action plan addressing the soil, groundwater, and soil vapor at the site. The Company has accrued liabilities where it is probable that a loss will be incurred and the cost or amount of loss can be reasonably estimated. Based on the latest determinations by the RWQCB and the most recent actions taken pursuant to the remedial action plan, the Company estimates the range of probable loss between $6.4 million and $8.0 million. To date, the Company has made $5.2 million in payments towards the remedial action plan and, as of October 25, 2020, has a remaining accrual of $1.2 million related to this matter. Given the uncertainties associated with environmental assessment and the remediation activities, the Company is unable to determine a best estimate within the range of loss. Therefore, the Company has recorded the minimum amount of probable loss. These estimates could change as a result of changes in planned remedial actions, further actions from the regulatory agency, remediation technology, and other factors. Indemnification The Company has entered into agreements with its current and former executives and directors indemnifying them against certain liabilities incurred in connection with the performance of their duties. The Company’s Certificate of Incorporation and Bylaws contain comparable indemnification obligations with respect to the Company’s current directors and employees. Product Warranties The Company’s general warranty policy provides for repair or replacement of defective parts. In some cases, a refund of the purchase price is offered. In certain instances, the Company has agreed to other or additional warranty terms, including indemnification provisions. The product warranty accrual reflects the Company’s best estimate of probable liability under its product warranties. The Company accrues for known warranty issues if a loss is probable and can be reasonably estimated, and accrues for estimated incurred but unidentified issues based on historical experience. Historically, warranty expense and the related accrual has been immaterial to the Company’s consolidated financial statements. Deferred Compensation The Company maintains a deferred compensation plan for certain officers and key executives that allows participants to defer a portion of their compensation for future distribution at various times permitted by the plan. This plan provides for a discretionary Company match up to a defined portion of the employee's deferral, with any match subject to a vesting period. The Company's liability for the deferred compensation plan is presented below: (in thousands) October 25, 2020 January 26, 2020 Accrued liabilities $ 5,353 $ 1,365 Other long-term liabilities 36,279 35,243 Total deferred compensation liabilities under this plan $ 41,632 $ 36,608 The Company has purchased whole life insurance on the lives of certain current deferred compensation plan participants. This Company-owned life insurance is held in a grantor trust and is intended to cover a majority of the Company's costs of the deferred compensation plan. The cash surrender value of the Company-owned life insurance was $25.8 million and $24.3 million as of October 25, 2020 and January 26, 2020, respectively, and is included in "Other assets" in the Balance Sheets. Earn-out Liability Pursuant to the terms of an amended earn-out arrangement ("Cycleo Earn-out") with the former shareholders of Cycleo SAS ("Cycleo Earn-out Beneficiaries"), which the Company acquired in March 2012, the Company must make payments based on the achievement of a combination of certain sales and operating income milestones over the period of April 27, 2015 to April 26, 2020. No payments have been made during the first nine months of fiscal year 2021 for the remaining earn-out milestone. Any payment for the earn-out is not expected to be material. Restructuring From time to time, the Company takes steps to realign the business to focus on high-growth areas, provide customer value and make the Company more efficient. As a result, the Company has re-aligned resources and infrastructure predominantly related to its wireless charging business, which resulted in restructuring expense of zero and $2.1 million in the three and nine months ended October 27, 2019, respectively, which were included in SG&A expenses in the Statements of Income. The Company did not have any restructuring expense during the three and nine months ended October 25, 2020.

Concentration of Risk

Concentration of Risk	9 Months Ended
	Oct. 25, 2020
Risks and Uncertainties [Abstract]
Concentration of Risk	Concentration of Risk The following significant customers accounted for at least 10% of net sales in one or more of the periods indicated: Three Months Ended Nine Months Ended (percentage of net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Trend-tek Technology Ltd. (and affiliates) 16 % 13 % 17 % 13 % Frontek Technology Corporation (and affiliates) 16 % 12 % 14 % 11 % CEAC International Limited 10 % 10 % 11 % 7 % Arrow Electronics (and affiliates) 9 % 10 % 9 % 9 % Premier Technical Sales Korea, Inc. (and affiliates) (1) 6 % 8 % 6 % 7 % Samsung Electronics (and affiliates) (1) 3 % 4 % 2 % 5 % (1) Premier is a distributor with a concentration of sales to Samsung. The above percentages represent the Company's estimate of the sales activity related to Samsung that is passing through this distributor. The following table shows the customers that had an outstanding receivable balance that represented at least 10% of total net receivables as of one or more of the dates indicated: Balance as of (percentage of net receivables) October 25, 2020 January 26, 2020 Trend-tek Technology Ltd (and affiliates) 16 % 13 % CEAC International Limited 11 % 11 % Frontek Technology Corporation (and affiliates) 10 % 11 % Outside Subcontractors and Suppliers

Segment Information

Segment Information	9 Months Ended
	Oct. 25, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s CEO functions as the chief operating decision maker ("CODM"). The CODM makes operating decisions and assesses performance based on the Company's major product lines, which represent its operating segments. The Company has three operating segments—Signal Integrity, Wireless and Sensing, and Protection—that have similar economic characteristics and have been aggregated into one reportable segment identified as the "Semiconductor Products Group." The Company’s assets are commingled among the three operating segments and the CODM does not use asset information in making operating decisions or assessing performance. Therefore, the Company has not included asset information by segment in the segment disclosures below. Net sales by segment were as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Semiconductor Products Group $ 154,082 $ 141,011 $ 430,444 $ 409,511 Total $ 154,082 $ 141,011 $ 430,444 $ 409,511 The following table presents a reconciliation of operating income by segment to consolidated income before taxes. Historical amounts have been adjusted to conform to the current presentation: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Semiconductor Products Group $ 37,668 $ 33,904 $ 100,584 $ 94,037 Operating income by segment 37,668 33,904 100,584 94,037 Items to reconcile segment operating income to consolidated income before taxes: Share-based compensation 13,538 13,055 36,103 37,458 Intangible amortization 1,798 3,770 6,658 12,821 Investment impairments and credit loss reserves 335 — 5,450 — Changes in the fair value of contingent earn-out obligations — (152) (33) (2,313) Restructuring and other reserves — — 502 2,711 Litigation cost, net of recoveries 558 205 809 930 Transaction and integration related 292 (851) 539 617 Interest expense 1,008 2,183 3,819 7,247 Non-operating expense (income), net 236 (644) (11) (2,900) Income before taxes and equity in net gains of equity method investments $ 19,903 $ 16,338 $ 46,748 $ 37,466 Information by Product Line The Company operates exclusively in the semiconductor industry and primarily within the analog and mixed-signal sector. The table below provides net sales activity by product line on a comparative basis: Three Months Ended Nine Months Ended (in thousands, except percentages) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Signal Integrity $ 61,553 40 % $ 58,563 42 % $ 193,127 44 % $ 163,913 40 % Wireless and Sensing 51,145 33 % 42,287 30 % 122,933 29 % 126,190 31 % Protection 41,384 27 % 40,161 28 % 114,384 27 % 119,408 29 % Total net sales $ 154,082 100 % $ 141,011 100 % $ 430,444 100 % $ 409,511 100 % Information by Sales Channel (in thousands, except percentages) Three Months Ended Nine Months Ended October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Distributor $ 125,610 82 % $ 107,383 76 % $ 346,103 80 % $ 287,642 70 % Direct 28,472 18 % 33,628 24 % 84,341 20 % 121,869 30 % Total net sales $ 154,082 100 % $ 141,011 100 % $ 430,444 100 % $ 409,511 100 % Generally, the Company does not have long-term contracts with its distributors and most can terminate th eir agreement with little or no notice. For the third quarter of fiscal year 2021, the Company's largest distributors were based in Asia. Geographic Information Net sales activity by geographic region was as follows: Three Months Ended Nine Months Ended (percentage of total net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Asia-Pacific 80 % 75 % 80 % 76 % North America 12 % 16 % 12 % 15 % Europe 8 % 9 % 8 % 9 % 100 % 100 % 100 % 100 % The Company attributes sales to a country based on the ship-to address. The table below summarizes sales activity to countries that represented greater than 10% of total net sales for at least one of the periods presented: Three Months Ended Nine Months Ended (percentage of total net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 China (including Hong Kong) 58 % 50 % 59 % 52 % United States 10 % 10 % 10 % 10 % Although a large percentage of our products is shipped into the Asia-Pacific region, a significant number of the products produced by these customers and incorporating our semiconductor products are then sold outside this region.

Stock Repurchase Program

Stock Repurchase Program	9 Months Ended
	Oct. 25, 2020
Equity [Abstract]
Stock Repurchase Program	Stock Repurchase Program The Company maintains a stock repurchase program that was initially approved by its Board of Directors in March 2008. The stock repurchase program does not have an expiration date and the Company’s Board of Directors has authorized expansion of the program over the years. The following table summarizes activity under the program for the presented periods: Three Months Ended Nine Months Ended October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 (in thousands, except number of shares) Shares Amount Paid Shares Amount Paid Shares Price Paid Shares Price Paid Shares repurchased under the stock repurchase program 439,921 $ 24,046 477,262 $ 22,526 1,527,834 $ 66,433 925,743 $ 42,636 On May 24, 2018, the Company's Board of Directors authorized the expansion of the stock repurchase program by $250.0 million. As of October 25, 2020, the Company had repurchased $404.2 million in shares of its common stock under the program since inception and the remaining authorization under the program was $44.2 million. Under the program, the Company may repurchase its common stock at any time or from time to time, without prior notice, subject to market conditions and other considerations. The Company’s repurchases may be made through Rule 10b5-1 and/or Rule 10b-18 or other trading plans, open market purchases, privately negotiated transactions, block purchases or other transactions. The Company intends to fund repurchases under the program from cash on hand. The Company has no obligation to repurchase any shares under the program and may suspend or discontinue it at any time.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Oct. 25, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company is exposed to certain risk arising from both its business operations and economic conditions and principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company, on a routine basis and in the normal course of business, experiences expenses denominated in Swiss Franc ("CHF"), Canadian Dollar ("CAD") and Great British Pound ("GBP"). Such expenses expose the Company to exchange rate fluctuations between these foreign currencies and the U.S. Dollar ("USD"). The Company occasionally uses derivative financial instruments, in the form of forward contracts, to mitigate a portion of the risk associated with adverse movements in these foreign currency exchange rates during a twelve-month window. Currency forward contracts involve fixing the exchange rate for delivery of a specified amount of foreign currency on a specified date. The Company’s accounting treatment for these instruments is based on whether or not the instruments are designated as a hedging instrument. The Company is currently applying hedge accounting to all foreign currency derivatives and has designated these hedges as cash flow hedges. The Company's foreign exchange contracts had the following outstanding balances: Balance as of (in thousands, except number of instruments data) October 25, 2020 January 26, 2020 Foreign Exchange Contracts Number of Instruments Sell Notional Value Buy Notional Value Number of Instruments Sell Notional Value Buy Notional Value Sell USD/Buy CAD Forward Contract 3 $ 4,287 C$ 6,000 — $ — C$ — Sell USD/Buy GBP Forward Contract 3 $ 2,255 £ 1,800 — $ — £ — Total 6 — These contracts have been designated as cash flows hedges and the unrealized gains or losses, net of tax, are recorded as a component of "Accumulated other comprehensive income or loss" ("AOCI") in the Balance Sheets. The effective portions of the cash flow hedges are recorded in AOCI until the hedged item is recognized in "SG&A expense" in the Statements of Income once the foreign exchange contract matures, offsetting the underlying hedged expenses. Any ineffective portions of the cash flow hedges are recorded in "Non-operating expense, net" in the Statements of Income. In the first quarter of fiscal year 2021, the Company entered into an interest rate swap agreement with a three-year term to hedge the variability of interest payments on the first $150.0 million of debt outstanding under the Company's Credit Facility. Interest payments on $150.0 million of the Company's debt are now fixed at a rate of 1.9775%, based on the Company's current leverage ratio. The interest rate swap agreement has been designated as a cash flow hedge and unrealized gains or losses, net of income tax, are recorded as a component of AOCI in the Balance Sheets. As the various settlements are made on a monthly basis, the realized gain or loss on the settlements are recorded in "Interest expense" in the Statements of Income. The realized loss on the interest rate swap agreement was not material for the three and nine months ended October 25, 2020. The fair values of the Company's derivative assets and liabilities that qualify as cash flow hedges in the Balance Sheets were as follows: Balance as of (in thousands) October 25, 2020 January 26, 2020 Foreign currency forward contracts $ 377 $ — Total other current assets $ 377 $ — Interest rate swap agreement $ 813 $ — Total accrued liabilities $ 813 $ — Interest rate swap agreement $ 1,041 $ — Total other long-term liabilities $ 1,041 $ —

Correction of Immaterial Errors

Correction of Immaterial Errors in Prior Period Financial Statements	9 Months Ended
	Oct. 25, 2020
Accounting Changes and Error Corrections [Abstract]
Correction of Immaterial Errors in Prior Period Financial Statements	Correction of Immaterial Errors in Prior Period Financial Statements During the fourth quarter of fiscal year 2020, management identified certain immaterial errors related to share-based compensation expense of market-condition awards granted during fiscal years 2018, 2019 and 2020. At the inception of these grants, the Company appropriately determined that the awards contained a market condition and that the effect of the market condition should be reflected in the grant date fair value of the awards, with the resulting compensation expense fixed at inception and recognized ratably over the requisite service period, regardless of when, if ever, the market condition is satisfied. The actual awards, however, were incorrectly accounted for as performance-based awards, whereby the number of shares expected to vest and corresponding compensation expense was adjusted on a quarterly basis. The Company assessed the materiality of the errors from a qualitative and quantitative perspective, and concluded that the impact of the errors is not material. Therefore, the correction of the errors did not require the amendment of the Company's previously filed Annual Reports on Form 10-K or its Quarterly Reports on Form 10-Q for the impacted periods. The Company has corrected its consolidated financial statements for these errors for the impacted prior periods presented in this Quarterly Report on Form 10-Q. The impact of the corrections on the Company's Statements of Income and Statements of Comprehensive Income for the three and nine months ended October 27, 2019, are presented in the table below: Three Months Ended Nine Months Ended October 27, 2019 October 27, 2019 (in thousands, except per share data) As Reported As Corrected As Reported As Corrected Selling, general and administrative $ 33,795 $ 37,777 $ 112,047 $ 120,074 Product development and engineering $ 26,670 $ 26,976 $ 79,322 $ 80,012 Total operating costs and expenses $ 64,083 $ 68,371 $ 201,877 $ 210,594 Operating income $ 22,165 $ 17,877 $ 50,530 $ 41,813 Income before taxes and equity in net gains of equity method investments $ 20,626 $ 16,338 $ 46,183 $ 37,466 Provision for income taxes $ 3,379 $ 2,693 $ 10,033 $ 8,638 Net income before equity in net gains of equity method investments $ 17,247 $ 13,645 $ 36,150 $ 28,828 Net income $ 17,599 $ 13,997 $ 36,259 $ 28,937 Earnings per share: Basic $ 0.27 $ 0.21 $ 0.55 $ 0.44 Diluted $ 0.26 $ 0.21 $ 0.54 $ 0.43 Comprehensive income $ 18,025 $ 14,423 $ 36,551 $ 29,229 There was no impact to the Company's Balance Sheets or to total operating cash flows in the Statements of Cash Flows for any periods presented in this Quarterly Report on Form 10-Q.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	9 Months Ended
	Oct. 25, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Year	Fiscal Year The Company reports results on the basis of 52 and 53-week periods and ends its fiscal year on the last Sunday in January. The other quarters generally end on the last Sunday of April, July and October. All quarters consist of 13 weeks except for one 14-week period in the fourth quarter of 53-week years. The third quarters of fiscal years 2021 and 2020 each consisted of 13 weeks.
Principles of Consolidation	Principles of Consolidation The accompanying interim unaudited condensed consolidated financial statements have been prepared by the Company, in accordance with accounting principles generally accepted in the United States ("GAAP") and on the same basis as the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 26, 2020 ("Annual Report"). The Company’s interim unaudited condensed consolidated statements of income are referred to herein as the "Statements of Income." The Company’s interim unaudited condensed consolidated balance sheets are referred to herein as the "Balance Sheets" and interim unaudited condensed consolidated statements of cash flows as the "Statements of Cash Flows." In the opinion of the Company, these interim unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, the financial position of the Company for the interim periods presented. All intercompany balances have been eliminated. Because the interim unaudited condensed consolidated financial statements do not include all of the information and notes required by GAAP for a complete set of consolidated financial statements, they should be read in conjunction with the audited consolidated financial statements and notes included in the Company's Annual Report. The results reported in these interim unaudited condensed consolidated financial statements should not be regarded as indicative of results that may be expected for any subsequent period or for the entire year.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Recent Accounting Pronouncements	Recently Adopted Accounting Guidance In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-13, Financial Instruments–Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. This guidance requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. It also requires credit losses on available-for-sale debt securities to be presented as an allowance, rather than reducing the carrying amount. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years. The Company adopted ASU 2016-13 In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as interbank offered rates and London Interbank Offered Rate (“LIBOR”). The guidance includes practical expedients for contract modifications due to reference rate reform. Generally, contract modifications related to reference rate reform may be considered an event that does not require remeasurement or reassessment of a previous accounting determination at the modification date. This guidance is effective immediately and is only available through December 31, 2022. The Company adopted this guidance in the third quarter of fiscal year 2021 and there was no impact on its consolidated financial statements. Accounting Guidance Issued, but not yet Adopted as of October 25, 2020 In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes, which modifies Accounting Standards Codification ("ASC") 740 to simplify the accounting for income taxes. This guidance impacts the accounting for hybrid tax regimes, the tax basis step-up in goodwill obtained in a transaction that is not a business combination, separate financial statements of legal entities not subject to tax, the intraperiod tax allocation exception to the incremental approach, ownership changes in investments from a subsidiary to an equity method investment and vice versa, interim period accounting for enacted changes in tax law and the year-to-date loss limitation in interim period tax accounting. This guidance is effective for fiscal years beginning after December 15, 2020, and interim periods within this those fiscal years, with early adoption permitted. The Company will adopt this guidance in the first quarter of fiscal year 2022 and is still evaluating the impact on its consolidated financial statements.
Earnings Per Share	Diluted earnings per common share incorporates the incremental shares issuable, calculated using the treasury stock method, upon the assumed exercise of non-qualified stock options and the vesting of restricted stock units and market-condition restricted stock unit awards if certain conditions have been met, but excludes such incremental shares that would have an anti-dilutive effect.
Share-based Compensation, Performance-based RSUs	The Company grants TSR market-condition restricted stock units (the "TSR Awards") to certain executives of the Company. The TSR Awards have a pre-defined market-condition, which determines the number of shares that ultimately vest, as well as a service condition. The TSR Awards are valued as of the measurement date using a Monte Carlo simulation which takes into consideration the possible outcomes pertaining to the TSR market condition and expense is recognized on a straight line basis over the vesting periods and is adjusted for any actual forfeitures.
Inventory	Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or net realizable value
Interest and Penalties on Unrecognized Tax Benefits	The Company’s policy is to include net interest and penalties related to unrecognized tax benefits in the "Provision for income taxes" in the Statements of Income.
Commitments and Contingencies	In accordance with ASC 450-20, Loss Contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated. The Company also discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for its consolidated financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote. The Company evaluates, at least quarterly, developments in its legal matters that could affect the amount of liability that has been previously accrued, and makes adjustments as appropriate. Significant judgment is required to determine both probability and the estimated amount. The Company may be unable to estimate a possible loss or range of possible loss due to various reasons, including, among others: (i) if the damages sought are indeterminate; (ii) if the proceedings are in early stages, (iii) if there is uncertainty as to the outcome of pending appeals, motions or settlements, (iv) if there are significant factual issues to be determined or resolved, and (v) if there are novel or unsettled legal theories presented. In such instances, there is considerable uncertainty regarding the ultimate resolution of such matters, including a possible eventual loss, if any. Because the outcomes of litigation and other legal matters are inherently unpredictable, the Company’s evaluation of legal matters or proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. While the consequences of certain unresolved matters and proceedings are not presently determinable, and an estimate of the probable and reasonably possible loss or range of loss in excess of amounts accrued for such proceedings cannot be reasonably made, an adverse outcome from such proceedings could have a material adverse effect on the Company’s earnings in any given reporting period. However, in the opinion of management, after consulting with legal counsel, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s consolidated financial statements, as a whole. However, legal matters are inherently unpredictable and subject to significant uncertainties, some of which are beyond the Company’s control. As such, even though the Company intends to vigorously defend itself with respect to its legal matters, there can be no assurance that the final outcome of these matters will not materially and adversely affect the Company’s business, financial condition, operating results, or cash flows. From time to time, the Company is involved in various claims, litigation, and other legal actions that are normal to the nature of its business, including with respect to intellectual property, contract, product liability, employment, and environmental matters. In the opinion of management, after consulting with legal counsel, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s consolidated financial statements, as a whole.
Product Warranties	The Company’s general warranty policy provides for repair or replacement of defective parts. In some cases, a refund of the purchase price is offered. In certain instances, the Company has agreed to other or additional warranty terms, including indemnification provisions. The product warranty accrual reflects the Company’s best estimate of probable liability under its product warranties. The Company accrues for known warranty issues if a loss is probable and can be reasonably estimated, and accrues for estimated incurred but unidentified issues based on historical experience. Historically, warranty expense and the related accrual has been immaterial to the Company’s consolidated financial statements.
Derivatives	The Company is exposed to certain risk arising from both its business operations and economic conditions and principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company, on a routine basis and in the normal course of business, experiences expenses denominated in Swiss Franc ("CHF"), Canadian Dollar ("CAD") and Great British Pound ("GBP"). Such expenses expose the Company to exchange rate fluctuations between these foreign currencies and the U.S. Dollar ("USD"). The Company occasionally uses derivative financial instruments, in the form of forward contracts, to mitigate a portion of the risk associated with adverse movements in these foreign currency exchange rates during a twelve-month window. Currency forward contracts involve fixing the exchange rate for delivery of a specified amount of foreign currency on a specified date. The Company’s accounting treatment for these instruments is based on whether or not the instruments are designated as a hedging instrument. The Company is currently applying hedge accounting to all foreign currency derivatives and has designated these hedges as cash flow hedges.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Oct. 25, 2020
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	The computation of basic and diluted earnings per common share was as follows: Three Months Ended Nine Months Ended (in thousands, except per share data) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Net income attributable to common stockholders $ 18,487 $ 13,997 $ 44,247 $ 28,937 Weighted-average common shares outstanding–basic 65,136 66,387 65,270 66,337 Dilutive effect of share-based compensation 831 931 780 1,293 Weighted-average common shares outstanding–diluted 65,967 67,318 66,050 67,630 Basic earnings per common share $ 0.28 $ 0.21 $ 0.68 $ 0.44 Diluted earnings per common share $ 0.28 $ 0.21 $ 0.67 $ 0.43 Anti-dilutive shares not included in the above calculations 523 237 274 223

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Oct. 25, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
Allocation Of Stock-Based Compensation	Pre-tax share-based compensation was included in the Statements of Income as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Cost of sales $ 654 $ 552 $ 1,734 $ 1,381 Selling, general and administrative 9,404 9,323 24,864 27,794 Product development and engineering 3,480 3,180 9,505 8,283 Total share-based compensation $ 13,538 $ 13,055 $ 36,103 $ 37,458

Available-for-sale securities (

Available-for-sale securities (Tables)	9 Months Ended
	Oct. 25, 2020
Investments [Abstract]
Summary of Investments	The following table summarizes the values of the Company’s available-for-sale securities: October 25, 2020 January 26, 2020 (in thousands) Fair Value Amortized Gross Fair Value Amortized Gross Convertible debt $ 11,233 $ 11,968 $ (735) $ 10,700 $ 8,715 $ 1,985 Total available-for-sale securities $ 11,233 $ 11,968 $ (735) $ 10,700 $ 8,715 $ 1,985
Schedule of Investments, Classified by Maturity Period	The following table summarizes the maturities of the Company’s available-for-sale securities: October 25, 2020 January 26, 2020 (in thousands) Fair Value Amortized Cost Fair Value Amortized Cost Within 1 year $ 9,829 $ 9,920 $ 10,200 $ 8,215 After 1 year through 5 years 1,404 2,048 500 500 Total available-for-sale securities $ 11,233 $ 11,968 $ 10,700 $ 8,715

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 25, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Financial assets and liabilities measured and recorded at fair value on a recurring basis were presented in the Balance Sheets as follows: Fair Value as of October 25, 2020 Fair Value as of January 26, 2020 (in thousands) Total (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Financial assets: Convertible debt $ 11,233 $ — $ — $ 11,233 $ 10,700 $ — $ — $ 10,700 Foreign currency forward contracts 377 — 377 — — — — — Total financial assets $ 11,610 $ — $ 377 $ 11,233 $ 10,700 $ — $ — $ 10,700 Financial liabilities: Cycleo Earn-out $ — $ — $ — $ — $ 2,108 $ — $ — $ 2,108 Interest rate swap agreement 1,854 — 1,854 — — — — — Total financial liabilities $ 1,854 $ — $ 1,854 $ — $ 2,108 $ — $ — $ 2,108
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents a reconciliation of the changes in the earn-out liability categorized within Level 3 in the nine months ended October 25, 2020: (in thousands) Balance at January 26, 2020 $ 2,108 Changes in fair value of contingent earn-out obligations (33) Changes in fair value of non-contingent earn-out obligations (117) Transferred out of Level 3 (1,958) Balance at October 25, 2020 $ —
Fair Value, Assets Measured on Recurring Basis	The following table presents a reconciliation of the changes in the convertible debt investments in the nine months ended October 25, 2020: (in thousands) Balance at January 26, 2020 $ 10,700 Additions 2,500 Increase in credit loss reserve (2,719) Interest accrued 752 Balance at October 25, 2020 $ 11,233

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Oct. 25, 2020
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or net realizable value and consisted of the following: (in thousands) October 25, 2020 January 26, 2020 Raw materials $ 3,054 $ 2,223 Work in progress 55,439 50,640 Finished goods 19,874 20,147 Inventories $ 78,367 $ 73,010

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Oct. 25, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amounts of Goodwill	The carrying amounts of goodwill by applicable reporting unit were as follows: (in thousands) Signal Integrity Wireless and Sensing Protection Total Balance at January 26, 2020 $ 274,085 $ 72,128 $ 4,928 $ 351,141 Balance at October 25, 2020 $ 274,085 $ 72,128 $ 4,928 $ 351,141
Schedule of Acquired Finite-Lived Intangible Assets	The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions, which are amortized over their estimated useful lives: October 25, 2020 January 26, 2020 (in thousands, except estimated useful life) Estimated Gross Accumulated Net Carrying Gross Accumulated Net Carrying Core technologies 3-8 years $ 43,300 $ (29,946) $ 13,354 $ 82,857 $ (63,434) $ 19,423 Customer relationships — — — 6,000 (5,411) 589 Total finite-lived intangible assets $ 43,300 $ (29,946) $ 13,354 $ 88,857 $ (68,845) $ 20,012
Finite-lived Intangible Assets Amortization Expense	Amortization expense of finite-lived intangible assets recorded in the Statements of Income for each period was as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Core technologies $ 1,798 $ 3,337 $ 6,069 $ 10,971 Customer relationships — 433 589 1,850 Total amortization expense $ 1,798 $ 3,770 $ 6,658 $ 12,821
Schedule of Future Amortization of Intangible Asset	Future amortization expense of finite-lived intangible assets is expected as follows: (in thousands) Fiscal Year Ending: Fiscal year 2021 (remaining three months) $ 1,608 Fiscal year 2022 4,942 Fiscal year 2023 4,002 Fiscal year 2024 1,676 Fiscal year 2025 288 Thereafter 838 Total expected amortization expense $ 13,354

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Oct. 25, 2020
Debt Instruments [Abstract]
Schedule of Long-term Debt	Long-term debt and the current period interest rates were as follows: Balance as of (in thousands, except percentages) October 25, 2020 January 26, 2020 Revolving loans $ 185,000 $ 197,000 Debt issuance costs (1,925) (2,257) Total long-term debt, net of debt issuance costs $ 183,075 $ 194,743 Effective interest rate (1) 1.87 % 2.95 % (1) The revolving loans bear interest at a variable rate based on LIBOR or a Base Rate, at the Company’s option, plus an applicable margin that varies based on the Company’s consolidated leverage ratio. In the first quarter of fiscal year 2021, the Company entered into an interest rate swap agreement that fixed the interest on the first $150.0 million of debt outstanding under the revolving loans at 1.9775%. As of October 25, 2020, the effective interest rate is a weighted-average rate that represents interest on the first $150.0 million of the debt outstanding at a fixed LIBOR rate of 0.7275% plus a margin of 1.25% (total fixed rate of 1.9775%), and the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.15% as of October 25, 2020, plus a margin of 1.25% (total variable rate of 1.40%). As of January 26, 2020, the interest rate was a variable rate based on the one-month LIBOR rate, which was 1.7% as of January 26, 2020, plus a margin of 1.25% (total variable rate of 2.95%).
Schedule Of Interest Expense	Interest expense was comprised of the following components for the periods presented: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Contractual interest (1) $ 888 $ 2,064 $ 3,457 $ 6,881 Amortization of debt discount and issuance costs 120 119 362 366 Total interest expense $ 1,008 $ 2,183 $ 3,819 $ 7,247 (1) Contractual interest represents the interest on the Company's outstanding debt after giving effect to the interest rate swap agreement.

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Oct. 25, 2020
Income Tax Disclosure [Abstract]
Summary of Income Tax Contingencies	A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (before the federal impact of state items) is as follows: (in thousands) Balance at January 26, 2020 $ 25,466 Additions/(decreases) based on tax positions related to the current fiscal year 278 Additions/(decreases) based on tax positions related to the prior fiscal years 1,240 Balance at October 25, 2020 $ 26,984
Liability For Uncertain Tax Positions	The liability for UTP is reflected in the Balance Sheets as follows: (in thousands) October 25, 2020 January 26, 2020 Deferred tax assets - non-current $ 15,736 $ 15,575 Other long-term liabilities 9,903 8,555 Total accrued taxes $ 25,639 $ 24,130
Regional Income (Loss) From Continuing Operations Before Income Taxes	The Company’s regional income (loss) from continuing operations before taxes and equity in net gains of equity method investments was as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Domestic $ (2,054) $ (1,845) $ (19,065) $ (20,907) Foreign 21,957 18,183 65,813 58,373 Total $ 19,903 $ 16,338 $ 46,748 $ 37,466

Leases (Tables)

Leases (Tables)	9 Months Ended
	Oct. 25, 2020
Leases [Abstract]
Lease, Cost	The components of lease expense were as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Operating lease cost $ 1,178 $ 1,183 $ 3,533 $ 3,610 Short-term lease cost — 81 — 242 Sublease income (35) (33) (102) (98) Total lease cost $ 1,143 $ 1,231 $ 3,431 $ 3,754 Supplemental cash flow information related to leases was as follows: Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 3,546 $ 3,874 Right-of-use assets obtained in exchange for new operating lease liabilities $ 4,119 $ 149 October 25, 2020 Weighted-average remaining lease term–operating leases 4.53 years Weighted-average discount rate on remaining lease payments–operating leases 6.8 %
Assets And Liabilities, Lessee	Supplemental balance sheet information related to leases was as follows: Balance as of (in thousands) October 25, 2020 January 26, 2020 Operating lease right-of-use assets in "Other assets" $ 12,159 $ 10,958 Operating lease liabilities in "Accrued liabilities" $ 3,643 $ 3,273 Operating lease liabilities in "Other long-term liabilities" 9,114 8,185 Total operating lease liabilities $ 12,757 $ 11,458
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities as of October 25, 2020 are as follows: (in thousands) Fiscal Year Ending: 2021 (remaining three months) $ 1,241 2022 4,078 2023 2,639 2024 2,231 2025 2,103 Thereafter 2,611 Total lease payments 14,903 Less: imputed interest (2,146) Total $ 12,757

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Oct. 25, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Liability for Deferred Compensation	The Company's liability for the deferred compensation plan is presented below: (in thousands) October 25, 2020 January 26, 2020 Accrued liabilities $ 5,353 $ 1,365 Other long-term liabilities 36,279 35,243 Total deferred compensation liabilities under this plan $ 41,632 $ 36,608

Concentration of Risk (Tables)

Concentration of Risk (Tables)	9 Months Ended
	Oct. 25, 2020
Risks and Uncertainties [Abstract]
Schedule Of Significant Customers Accounting For At Least 10% Of Net Sales	The following significant customers accounted for at least 10% of net sales in one or more of the periods indicated: Three Months Ended Nine Months Ended (percentage of net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Trend-tek Technology Ltd. (and affiliates) 16 % 13 % 17 % 13 % Frontek Technology Corporation (and affiliates) 16 % 12 % 14 % 11 % CEAC International Limited 10 % 10 % 11 % 7 % Arrow Electronics (and affiliates) 9 % 10 % 9 % 9 % Premier Technical Sales Korea, Inc. (and affiliates) (1) 6 % 8 % 6 % 7 % Samsung Electronics (and affiliates) (1) 3 % 4 % 2 % 5 % (1) Premier is a distributor with a concentration of sales to Samsung. The above percentages represent the Company's estimate of the sales activity related to Samsung that is passing through this distributor. The following table shows the customers that had an outstanding receivable balance that represented at least 10% of total net receivables as of one or more of the dates indicated: Balance as of (percentage of net receivables) October 25, 2020 January 26, 2020 Trend-tek Technology Ltd (and affiliates) 16 % 13 % CEAC International Limited 11 % 11 % Frontek Technology Corporation (and affiliates) 10 % 11 %

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Oct. 25, 2020
Segment Reporting [Abstract]
Net Sales by Segment	Net sales by segment were as follows: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Semiconductor Products Group $ 154,082 $ 141,011 $ 430,444 $ 409,511 Total $ 154,082 $ 141,011 $ 430,444 $ 409,511
Income by Segment and Reconciliation to Consolidated Operating Income	The following table presents a reconciliation of operating income by segment to consolidated income before taxes. Historical amounts have been adjusted to conform to the current presentation: Three Months Ended Nine Months Ended (in thousands) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Semiconductor Products Group $ 37,668 $ 33,904 $ 100,584 $ 94,037 Operating income by segment 37,668 33,904 100,584 94,037 Items to reconcile segment operating income to consolidated income before taxes: Share-based compensation 13,538 13,055 36,103 37,458 Intangible amortization 1,798 3,770 6,658 12,821 Investment impairments and credit loss reserves 335 — 5,450 — Changes in the fair value of contingent earn-out obligations — (152) (33) (2,313) Restructuring and other reserves — — 502 2,711 Litigation cost, net of recoveries 558 205 809 930 Transaction and integration related 292 (851) 539 617 Interest expense 1,008 2,183 3,819 7,247 Non-operating expense (income), net 236 (644) (11) (2,900) Income before taxes and equity in net gains of equity method investments $ 19,903 $ 16,338 $ 46,748 $ 37,466
Net Sales Activity By Product Line	The table below provides net sales activity by product line on a comparative basis: Three Months Ended Nine Months Ended (in thousands, except percentages) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Signal Integrity $ 61,553 40 % $ 58,563 42 % $ 193,127 44 % $ 163,913 40 % Wireless and Sensing 51,145 33 % 42,287 30 % 122,933 29 % 126,190 31 % Protection 41,384 27 % 40,161 28 % 114,384 27 % 119,408 29 % Total net sales $ 154,082 100 % $ 141,011 100 % $ 430,444 100 % $ 409,511 100 %
Schedule of Revenue from External Customers by Sales Channel	(in thousands, except percentages) Three Months Ended Nine Months Ended October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Distributor $ 125,610 82 % $ 107,383 76 % $ 346,103 80 % $ 287,642 70 % Direct 28,472 18 % 33,628 24 % 84,341 20 % 121,869 30 % Total net sales $ 154,082 100 % $ 141,011 100 % $ 430,444 100 % $ 409,511 100 %
Net Sales Activity By Geographic Region	Net sales activity by geographic region was as follows: Three Months Ended Nine Months Ended (percentage of total net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 Asia-Pacific 80 % 75 % 80 % 76 % North America 12 % 16 % 12 % 15 % Europe 8 % 9 % 8 % 9 % 100 % 100 % 100 % 100 %
Summary Of Sales Activity To Countries That Represented Greater Than 10% Of Total Net Sales	The table below summarizes sales activity to countries that represented greater than 10% of total net sales for at least one of the periods presented: Three Months Ended Nine Months Ended (percentage of total net sales) October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 China (including Hong Kong) 58 % 50 % 59 % 52 % United States 10 % 10 % 10 % 10 %

Stock Repurchase Program (Table

Stock Repurchase Program (Tables)	9 Months Ended
	Oct. 25, 2020
Equity [Abstract]
Class of Treasury Stock	The following table summarizes activity under the program for the presented periods: Three Months Ended Nine Months Ended October 25, 2020 October 27, 2019 October 25, 2020 October 27, 2019 (in thousands, except number of shares) Shares Amount Paid Shares Amount Paid Shares Price Paid Shares Price Paid Shares repurchased under the stock repurchase program 439,921 $ 24,046 477,262 $ 22,526 1,527,834 $ 66,433 925,743 $ 42,636

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Oct. 25, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Open Foreign Currency Contracts	The Company's foreign exchange contracts had the following outstanding balances: Balance as of (in thousands, except number of instruments data) October 25, 2020 January 26, 2020 Foreign Exchange Contracts Number of Instruments Sell Notional Value Buy Notional Value Number of Instruments Sell Notional Value Buy Notional Value Sell USD/Buy CAD Forward Contract 3 $ 4,287 C$ 6,000 — $ — C$ — Sell USD/Buy GBP Forward Contract 3 $ 2,255 £ 1,800 — $ — £ — Total 6 —
Summary of the Carrying Values of Derivative Instruments	The fair values of the Company's derivative assets and liabilities that qualify as cash flow hedges in the Balance Sheets were as follows: Balance as of (in thousands) October 25, 2020 January 26, 2020 Foreign currency forward contracts $ 377 $ — Total other current assets $ 377 $ — Interest rate swap agreement $ 813 $ — Total accrued liabilities $ 813 $ — Interest rate swap agreement $ 1,041 $ — Total other long-term liabilities $ 1,041 $ —

Correction of Immaterial Erro_2

Correction of Immaterial Errors in Prior Period Financial Statements (Tables)	9 Months Ended
	Oct. 25, 2020
Accounting Changes and Error Corrections [Abstract]
Immaterial Restatement of Prior Period Financial Statements	The impact of the corrections on the Company's Statements of Income and Statements of Comprehensive Income for the three and nine months ended October 27, 2019, are presented in the table below: Three Months Ended Nine Months Ended October 27, 2019 October 27, 2019 (in thousands, except per share data) As Reported As Corrected As Reported As Corrected Selling, general and administrative $ 33,795 $ 37,777 $ 112,047 $ 120,074 Product development and engineering $ 26,670 $ 26,976 $ 79,322 $ 80,012 Total operating costs and expenses $ 64,083 $ 68,371 $ 201,877 $ 210,594 Operating income $ 22,165 $ 17,877 $ 50,530 $ 41,813 Income before taxes and equity in net gains of equity method investments $ 20,626 $ 16,338 $ 46,183 $ 37,466 Provision for income taxes $ 3,379 $ 2,693 $ 10,033 $ 8,638 Net income before equity in net gains of equity method investments $ 17,247 $ 13,645 $ 36,150 $ 28,828 Net income $ 17,599 $ 13,997 $ 36,259 $ 28,937 Earnings per share: Basic $ 0.27 $ 0.21 $ 0.55 $ 0.44 Diluted $ 0.26 $ 0.21 $ 0.54 $ 0.43 Comprehensive income $ 18,025 $ 14,423 $ 36,551 $ 29,229

Organization and Basis of Pre_3

Organization and Basis of Presentation - Recently Adopted Accounting Guidance (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 26, 2020	Oct. 25, 2020	Jan. 27, 2020	Jan. 26, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting standards update	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Retained earnings		$ (655,540)		$ (611,607)
ASU 2016-13 | Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ 300
Credit loss reserve on held-to-maturity securities			$ 400	$ 400

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 18,487	$ 13,997	$ 44,247	$ 28,937
Weighted average common shares outstanding - basic (in shares)	65,136	66,387	65,270	66,337
Dilutive effect of share-based compensation (in shares)	831	931	780	1,293
Weighted average common shares outstanding - diluted (in shares)	65,967	67,318	66,050	67,630
Basic earnings per common share (in dollars per share)	$ 0.28	$ 0.21	$ 0.68	$ 0.44
Diluted earnings per common share (in dollars per share)	$ 0.28	$ 0.21	$ 0.67	$ 0.43
Anti-dilutive shares not included in the above calculations (in shares)	523	237	274	223

Share-Based Compensation - Allo

Share-Based Compensation - Allocation of Share-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 13,538	$ 13,055	$ 36,103	$ 37,458
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	654	552	1,734	1,381
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	9,404	9,323	24,864	27,794
Product development and engineering
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 3,480	$ 3,180	$ 9,505	$ 8,283

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details)	9 Months Ended
	Oct. 25, 2020$ / sharesshares
Market Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units)	137,224
Restricted Stock Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units)	822,162
Award vesting period	4 years
Restricted Stock, Cash Settlement | Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units)	14,742
Award vesting period	1 year
Restricted Stock, Share Settlement | Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units)	12,898
Award vesting period	1 year
Performance Period One | Market Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	1 year
Award vesting rights, percentage	33.33%
Grant date fair value per unit (in dollars per share) | $ / shares	$ 29.04
Performance Period Two | Market Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	2 years
Award vesting rights, percentage	33.33%
Grant date fair value per unit (in dollars per share) | $ / shares	$ 32.94
Performance Period Three | Market Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Award vesting rights, percentage	33.33%
Grant date fair value per unit (in dollars per share) | $ / shares	$ 35.99

Available-for-sale securities -

Available-for-sale securities - Summary Of Investments (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 11,233	$ 10,700
Total available-for-sale securities	11,968	8,715
Gross Unrealized Gain/(Loss)	(735)	1,985
Convertible debt
Debt Securities, Available-for-sale [Line Items]
Fair Value	11,233	10,700
Total available-for-sale securities	11,968	8,715
Gross Unrealized Gain/(Loss)	$ (735)	$ 1,985

Available-for-sale securities_2

Available-for-sale securities - Summary of Maturities of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Fair Value
Within 1 year	$ 9,829	$ 10,200
After 1 year through 5 years	1,404	500
Total available-for-sale securities	11,233	10,700
Amortized Cost
Within 1 year	9,920	8,215
After 1 year through 5 years	2,048	500
Total available-for-sale securities	$ 11,968	$ 8,715

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	$ 11,233	$ 10,700
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	11,610	10,700
Total financial liabilities	1,854	2,108
Fair Value, Measurements, Recurring | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	0	0
Total financial liabilities	0	0
Fair Value, Measurements, Recurring | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	377	0
Total financial liabilities	1,854	0
Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	11,233	10,700
Total financial liabilities	0	2,108
Fair Value, Measurements, Recurring | Cycleo
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cycleo Earn-out	0	2,108
Fair Value, Measurements, Recurring | Cycleo | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cycleo Earn-out	0	0
Fair Value, Measurements, Recurring | Cycleo | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cycleo Earn-out	0	0
Fair Value, Measurements, Recurring | Cycleo | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cycleo Earn-out	0	2,108
Fair Value, Measurements, Recurring | Convertible debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	11,233	10,700
Fair Value, Measurements, Recurring | Convertible debt | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	0	0
Fair Value, Measurements, Recurring | Convertible debt | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	0	0
Fair Value, Measurements, Recurring | Convertible debt | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	11,233	10,700
Foreign Exchange Contract | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Foreign currency forward contracts	377	0
Foreign Exchange Contract | Fair Value, Measurements, Recurring | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Foreign currency forward contracts	0	0
Foreign Exchange Contract | Fair Value, Measurements, Recurring | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Foreign currency forward contracts	377	0
Foreign Exchange Contract | Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Foreign currency forward contracts	0	0
Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Interest rate swap agreement	1,854	0
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Interest rate swap agreement	0	0
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Interest rate swap agreement	1,854	0
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Interest rate swap agreement	$ 0	$ 0

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Changes in Earn-Out Liability, Level 3 (Details) $ in Thousands	9 Months Ended
	Oct. 25, 2020USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 2,108
Transferred out of Level 3	(1,958)
Ending balance	0
Contingent Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in fair value of obligations	(33)
Non-Contingent Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in fair value of obligations	$ (117)

Fair Value Measurements - Rec_2

Fair Value Measurements - Reconciliation of Changes in Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 25, 2020	Oct. 25, 2020
Debt Securities, Available For Sale, Reconciliation [Roll Forward]
Balance at January 26, 2020		$ 10,700
Additions		2,500
Increase in credit loss reserve	$ (300)	(2,719)
Interest accrued		752
Balance at October 25, 2020	$ 11,233	$ 11,233

Fair Value Measurements - Inves

Fair Value Measurements - Investment Impairments and Credit Loss Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Apr. 26, 2020	Oct. 25, 2020	Jan. 27, 2020	Jan. 26, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting standards update		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Increase in credit loss reserves on available-for-sale and held-to-maturity debt securities	$ 300		$ 2,719
Credit loss reserve for available-for-sale and held-to-maturity debt securities	3,200		3,200
Impairment on non-marketable equity securities	$ 0		$ 2,900
ASU 2016-13 | Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Credit loss reserve on held-to-maturity securities				$ 400	$ 400

Inventories - Summary of Invent

Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 3,054	$ 2,223
Work in progress	55,439	50,640
Finished goods	19,874	20,147
Inventories	$ 78,367	$ 73,010

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Goodwill [Line Items]
Goodwill balance	$ 351,141	$ 351,141
Signal Integrity
Goodwill [Line Items]
Goodwill balance	274,085	274,085
Wireless and Sensing
Goodwill [Line Items]
Goodwill balance	72,128	72,128
Protection
Goodwill [Line Items]
Goodwill balance	$ 4,928	$ 4,928

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 25, 2020	Jan. 26, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 43,300	$ 88,857
Accumulated Amortization	(29,946)	(68,845)
Total expected amortization expense	13,354	20,012
Core technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,300	82,857
Accumulated Amortization	(29,946)	(63,434)
Total expected amortization expense	$ 13,354	19,423
Core technologies | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Core technologies | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 0	6,000
Accumulated Amortization	0	(5,411)
Total expected amortization expense	$ 0	$ 589

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Asset Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 1,798	$ 3,770	$ 6,658	$ 12,821
Core technologies
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	1,798	3,337	6,069	10,971
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 0	$ 433	$ 589	$ 1,850

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Fiscal year 2021 (remaining three months)	$ 1,608
Fiscal year 2022	4,942
Fiscal year 2023	4,002
Fiscal year 2024	1,676
Fiscal year 2025	288
Thereafter	838
Total expected amortization expense	$ 13,354	$ 20,012

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 26, 2020	Oct. 25, 2020	Jan. 26, 2020
Debt Instrument [Line Items]
Debt issuance costs		$ (1,925)	$ (2,257)
Total long-term debt, net of debt issuance costs		$ 183,075	$ 194,743
Effective interest rate		1.87%	2.95%
Revolving loans
Debt Instrument [Line Items]
Total debt		$ 185,000	$ 197,000
Debt amount bearing fixed interest rate	$ 150,000	$ 150,000
Fixed interest rate	1.9775%	1.9775%
LIBOR portion of fixed rate		0.7275%
Variable rate at end of period		1.40%	2.95%
One-month LIBOR | Revolving loans
Debt Instrument [Line Items]
Debt instrument margin	1.25%	1.25%
LIBOR | Revolving loans
Debt Instrument [Line Items]
Debt instrument margin		1.25%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details) - Revolving loans - USD ($)	Oct. 25, 2020	Jan. 26, 2020	Nov. 07, 2019
Facilities, maximum borrowing capacity			$ 600,000,000
Amounts outstanding	$ 185,000,000	$ 197,000,000
Undrawn capacity	$ 415,000,000

Long-Term Debt - Schedule of In

Long-Term Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Debt Disclosure [Abstract]
Contractual interest	$ 888	$ 2,064	$ 3,457	$ 6,881
Amortization of debt discount and issuance costs	120	119	362	366
Total interest expense	$ 1,008	$ 2,183	$ 3,819	$ 7,247

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Contingencies (Details) $ in Thousands	9 Months Ended
	Oct. 25, 2020USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 26, 2020	$ 25,466
Additions/(decreases) based on tax positions related to the current fiscal year	278
Additions/(decreases) based on tax positions related to the prior fiscal years	1,240
Balance at October 25, 2020	$ 26,984

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	Oct. 25, 2020	Jan. 26, 2020
Income Tax Disclosure [Abstract]
Net tax benefits, if recognized, would impact the effective tax rate	$ 9.9	$ 8.6

Income Taxes - Liability For Un

Income Taxes - Liability For Uncertain Tax Positions (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Income Tax Contingency [Line Items]
Total accrued taxes	$ 25,639	$ 24,130
Deferred tax assets - non-current
Income Tax Contingency [Line Items]
Total accrued taxes	15,736	15,575
Other long-term liabilities
Income Tax Contingency [Line Items]
Total accrued taxes	$ 9,903	$ 8,555

Income Taxes - Regional Income

Income Taxes - Regional Income (Loss) From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (2,054)	$ (1,845)	$ (19,065)	$ (20,907)
Foreign	21,957	18,183	65,813	58,373
Income before taxes and equity in net gains of equity method investments	$ 19,903	$ 16,338	$ 46,748	$ 37,466

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	9 Months Ended
	Oct. 25, 2020USD ($)numberOfLeases	Dec. 02, 2020
Lessee, Lease, Description [Line Items]
Remaining lease term–operating leases	10 years
Maximum renewal term	5 years
Termination period	1 year
Lease not commenced, number of leases | numberOfLeases	2
Lease not commenced, lease liability | $	$ 4.5
Subsequent Event
Lessee, Lease, Description [Line Items]
Lease not commenced, term		10 years

Leases - The Components of Leas

Leases - The Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Leases [Abstract]
Operating lease cost	$ 1,178	$ 1,183	$ 3,533	$ 3,610
Short-term lease cost	0	81	0	242
Sublease income	(35)	(33)	(102)	(98)
Total lease cost	$ 1,143	$ 1,231	$ 3,431	$ 3,754

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 3,546	$ 3,874
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 4,119	$ 149
Weighted-average remaining lease term–operating leases	4 years 6 months 10 days
Weighted-average discount rate on remaining lease payments–operating leases	6.80%

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Operating lease right-of-use assets in "Other assets"	$ 12,159	$ 10,958
Operating lease liabilities in "Accrued liabilities"	3,643	3,273
Operating lease liabilities in "Other long-term liabilities"	9,114	8,185
Total operating lease liabilities	$ 12,757	$ 11,458

Leases - Maturity (Details)

Leases - Maturity (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Leases [Abstract]
2021 (remaining three months)	$ 1,241
2022	4,078
2023	2,639
2024	2,231
2025	2,103
Thereafter	2,611
Total lease payments	14,903
Less: imputed interest	(2,146)
Total	$ 12,757	$ 11,458

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Aug. 01, 2018	Oct. 27, 2019	Apr. 28, 2019	Oct. 25, 2020	Oct. 27, 2019	Jan. 27, 2019	Jan. 26, 2020
Commitments and Contingencies [Line Items]
Legal recoveries	$ 9
Restructuring expense		$ 0			$ 2.1
Environmental Issue
Commitments and Contingencies [Line Items]
Loss contingency, estimate of probable loss				$ 1.2
Aggregate payments towards remediation plan to date				5.2
Minimum | Environmental Issue
Commitments and Contingencies [Line Items]
Loss contingency, estimate of probable loss				6.4
Maximum | Environmental Issue
Commitments and Contingencies [Line Items]
Loss contingency, estimate of probable loss				8
Other Assets
Commitments and Contingencies [Line Items]
Cash surrender value of life insurance				$ 25.8			$ 24.3
Selling, General and Administrative Expenses
Commitments and Contingencies [Line Items]
Legal recoveries			$ 1			$ 8

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Liability for Deferred Compensation (Details) (Details) - Deferred Compensation Plan For Officers And Executives - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Loss Contingencies [Line Items]
Total deferred compensation liabilities under this plan	$ 41,632	$ 36,608
Accrued liabilities
Loss Contingencies [Line Items]
Accrued liabilities	5,353	1,365
Other long-term liabilities
Loss Contingencies [Line Items]
Other long-term liabilities	$ 36,279	$ 35,243

Concentration of Risk - Schedul

Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales During Period (Details)	Oct. 25, 2020	Jan. 26, 2020	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Concentration Risk [Line Items]
Concentration risk, percentage			100.00%	100.00%	100.00%	100.00%
Net sales
Concentration Risk [Line Items]
Concentration risk, percentage			100.00%	100.00%	100.00%	100.00%
Customer Concentration Risk | Net sales | Trend-tek Technology Ltd. (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage			16.00%	13.00%	17.00%	13.00%
Customer Concentration Risk | Net sales | Frontek Technology Corporation (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage			16.00%	12.00%	14.00%	11.00%
Customer Concentration Risk | Net sales | CEAC International Limited
Concentration Risk [Line Items]
Concentration risk, percentage			10.00%	10.00%	11.00%	7.00%
Customer Concentration Risk | Net sales | Arrow Electronics (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage			9.00%	10.00%	9.00%	9.00%
Customer Concentration Risk | Net sales | Premier Technical Sales Korea, Inc. (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage			6.00%	8.00%	6.00%	7.00%
Customer Concentration Risk | Net sales | Samsung Electronics (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage			3.00%	4.00%	2.00%	5.00%
Customer Concentration Risk | Accounts Receivable | Trend-tek Technology Ltd. (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	13.00%
Customer Concentration Risk | Accounts Receivable | Frontek Technology Corporation (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	11.00%
Customer Concentration Risk | Accounts Receivable | CEAC International Limited
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%	11.00%

Concentration of Risk - Narrati

Concentration of Risk - Narrative (Details)	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
China | Cost of Silicon Wafers | Supplier concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	30.00%	18.00%	23.00%
Israel | Cost of Silicon Wafers | Supplier concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage	4.00%	10.00%	7.00%	12.00%

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
	Oct. 25, 2020reportable_segmentoperating_segment
Segment Reporting [Abstract]
Number of operating segments | operating_segment	3
Number of reportable segments | reportable_segment	1

Segment Information - Net Sales

Segment Information - Net Sales Activity by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenue from External Customer [Line Items]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511
Semiconductor Products Group
Revenue from External Customer [Line Items]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511

Segment Information - Income by

Segment Information - Income by Segment and Reconciliation to Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Segment Reporting Information [Line Items]
Operating income (loss)	$ 21,482	$ 17,877	$ 56,006	$ 41,813
Items to reconcile segment operating income to consolidated income before taxes:
Share-based compensation	13,538	13,055	36,103	37,458
Intangible amortization	1,798	3,770	6,658	12,821
Investment impairments and credit loss reserves	335	0	5,450	0
Changes in the fair value of contingent earn-out obligations	0	(152)	(33)	(2,313)
Interest expense	1,008	2,183	3,819	7,247
Non-operating expense (income), net	236	(644)	(11)	(2,900)
Income before taxes and equity in net gains of equity method investments	19,903	16,338	46,748	37,466
Corporate, Non-Segment
Items to reconcile segment operating income to consolidated income before taxes:
Share-based compensation	13,538	13,055	36,103	37,458
Intangible amortization	1,798	3,770	6,658	12,821
Investment impairments and credit loss reserves	335	0	5,450	0
Changes in the fair value of contingent earn-out obligations	0	(152)	(33)	(2,313)
Restructuring and other reserves	0	0	502	2,711
Litigation cost, net of recoveries	558	205	809	930
Transaction and integration related	292	(851)	539	617
Interest expense	1,008	2,183	3,819	7,247
Non-operating expense (income), net	236	(644)	(11)	(2,900)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	37,668	33,904	100,584	94,037
Semiconductor Products Group
Segment Reporting Information [Line Items]
Operating income (loss)	$ 37,668	$ 33,904	$ 100,584	$ 94,037

Segment Information - Revenue b

Segment Information - Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenue from External Customer [Line Items]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Signal Integrity
Revenue from External Customer [Line Items]
Net sales	$ 61,553	$ 58,563	$ 193,127	$ 163,913
Wireless and Sensing
Revenue from External Customer [Line Items]
Net sales	51,145	42,287	122,933	126,190
Protection
Revenue from External Customer [Line Items]
Net sales	$ 41,384	$ 40,161	$ 114,384	$ 119,408
Net sales
Revenue from External Customer [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales | Signal Integrity
Revenue from External Customer [Line Items]
Concentration risk, percentage	40.00%	42.00%	44.00%	40.00%
Net sales | Wireless and Sensing
Revenue from External Customer [Line Items]
Concentration risk, percentage	33.00%	30.00%	29.00%	31.00%
Net sales | Protection
Revenue from External Customer [Line Items]
Concentration risk, percentage	27.00%	28.00%	27.00%	29.00%

Segment Information - Revenue_2

Segment Information - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Distributor
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 125,610	$ 107,383	$ 346,103	$ 287,642
Concentration risk, percentage	82.00%	76.00%	80.00%	70.00%
Direct
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 28,472	$ 33,628	$ 84,341	$ 121,869
Concentration risk, percentage	18.00%	24.00%	20.00%	30.00%

Segment Information - Net Sal_2

Segment Information - Net Sales Activity by Geographic Region (Details)	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales | Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	80.00%	75.00%	80.00%	76.00%
Net sales | North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	16.00%	12.00%	15.00%
Net sales | Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	8.00%	9.00%	8.00%	9.00%

Segment Information - Summary o

Segment Information - Summary of Sales Activity to Countries that Represented Greater than 10% of Total Net Sales (Details)	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | Net sales | China (including Hong Kong)
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	58.00%	50.00%	59.00%	52.00%
Geographic Concentration Risk | Net sales | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%

Stock Repurchase Program - Summ

Stock Repurchase Program - Summary of Stock Repurchases (Details) - USD ($) $ in Thousands	Oct. 25, 2020	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Equity, Class of Treasury Stock [Line Items]
Shares repurchased under the stock repurchase program, value	$ 404,200	$ 24,046	$ 22,526	$ 66,433	$ 42,636
Shares repurchased under the stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased under the stock repurchase program (in shares)		439,921	477,262	1,527,834	925,743
Shares repurchased under the stock repurchase program, value		$ 24,046	$ 22,526	$ 66,433	$ 42,636

Stock Repurchase Program - Narr

Stock Repurchase Program - Narrative (Details) - USD ($)	Oct. 25, 2020	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019	May 24, 2018
Equity [Abstract]
Additional stock repurchase amount authorized						$ 250,000,000
Shares repurchased under the stock repurchase program, value	$ 404,200,000	$ 24,046,000	$ 22,526,000	$ 66,433,000	$ 42,636,000
Remaining authorization under stock repurchase program	$ 44,200,000	$ 44,200,000		$ 44,200,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details) £ in Thousands, $ in Thousands, $ in Thousands	Oct. 25, 2020USD ($)instrument	Oct. 25, 2020CAD ($)instrument	Oct. 25, 2020GBP (£)instrument	Jan. 26, 2020USD ($)instrument	Jan. 26, 2020CAD ($)instrument	Jan. 26, 2020GBP (£)instrument
Derivative [Line Items]
Number of instruments | instrument	6	6	6	0	0	0
Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Number of instruments | instrument	3	3	3	0	0	0
Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Number of instruments | instrument	3	3	3	0	0	0
Sell Notional Value | Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Notional value | $	$ 4,287			$ 0
Sell Notional Value | Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Notional value | $	$ 2,255			$ 0
Buy Notional Value | Sell USD/Buy CAD Forward Contract
Derivative [Line Items]
Notional value | $		$ 6,000			$ 0
Buy Notional Value | Sell USD/Buy GBP Forward Contract
Derivative [Line Items]
Notional value | £			£ 1,800			£ 0

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Narrative (Details) - Interest Rate Swap - USD ($) $ in Millions	3 Months Ended
	Apr. 26, 2020	Oct. 25, 2020	Jul. 26, 2020
Derivative [Line Items]
Derivative term	3 years
Outstanding borrowings		$ 150	$ 150
Fixed interest rate		1.9775%

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Summary of the Carrying Values of Derivative Instruments (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	Oct. 25, 2020	Jan. 26, 2020
Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	$ 377	$ 0
Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	813	0
Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	1,041	0
Foreign Exchange Contract | Other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	377	0
Interest Rate Swap | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	813	0
Interest Rate Swap | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	$ 1,041	$ 0

Correction of Immaterial Erro_3

Correction of Immaterial Errors in Prior Period Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative	$ 42,891	$ 37,777	$ 115,746	$ 120,074
Product development and engineering	27,890	26,976	84,696	80,012
Total operating costs and expenses	72,579	68,371	207,067	210,594
Operating income	21,482	17,877	56,006	41,813
Income before taxes and equity in net gains of equity method investments	19,903	16,338	46,748	37,466
Provision for income taxes	1,580	2,693	2,523	8,638
Net income before equity in net gains of equity method investments		13,645		28,828
Net income	$ 18,482	$ 13,997	$ 44,236	$ 28,937
Basic (in dollars per share)	$ 0.28	$ 0.21	$ 0.68	$ 0.44
Diluted (in dollars per share)	$ 0.28	$ 0.21	$ 0.67	$ 0.43
Comprehensive income	$ 18,704	$ 14,423	$ 43,283	$ 29,229
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative		33,795		112,047
Product development and engineering		26,670		79,322
Total operating costs and expenses		64,083		201,877
Operating income		22,165		50,530
Income before taxes and equity in net gains of equity method investments		20,626		46,183
Provision for income taxes		3,379		10,033
Net income before equity in net gains of equity method investments		17,247		36,150
Net income		$ 17,599		$ 36,259
Basic (in dollars per share)		$ 0.27		$ 0.55
Diluted (in dollars per share)		$ 0.26		$ 0.54
Comprehensive income		$ 18,025		$ 36,551