Semtech (SMTC) 10-Q 1 Dec 21 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Oct. 31, 2021	Nov. 26, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2021
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		64,436,830
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000088941
Current Fiscal Year End Date	--01-30

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Income Statement [Abstract]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444
Cost of sales	71,243	60,021	206,326	167,371
Gross profit	123,689	94,061	343,982	263,073
Operating costs and expenses:
Selling, general and administrative	47,621	42,891	128,402	115,746
Product development and engineering	37,346	27,890	109,633	84,696
Intangible amortization	1,298	1,798	3,894	6,658
Changes in the fair value of contingent earn-out obligations	0	0	0	(33)
Total operating costs and expenses	86,265	72,579	241,929	207,067
Operating income	37,424	21,482	102,053	56,006
Interest expense	(1,233)	(1,008)	(3,617)	(3,819)
Non-operating income (expense), net	105	(236)	412	11
Investment impairments and credit loss reserves	(216)	(335)	(930)	(5,450)
Income before taxes and equity in net gains of equity method investments	36,080	19,903	97,918	46,748
Provision for income taxes	3,018	1,580	9,179	2,523
Net income before equity in net gains of equity method investments	33,062	18,323	88,739	44,225
Equity in net gains of equity method investments	1,363	159	2,115	11
Net income	34,425	18,482	90,854	44,236
Net loss attributable to noncontrolling interest	(2)	(5)	(6)	(11)
Net income attributable to common stockholders	$ 34,427	$ 18,487	$ 90,860	$ 44,247
Earnings per share:
Basic (in dollars per share)	$ 0.53	$ 0.28	$ 1.40	$ 0.68
Diluted (in dollars per share)	$ 0.53	$ 0.28	$ 1.38	$ 0.67
Weighted-average number of shares used in computing earnings per share:
Basic (in shares)	64,546	65,136	64,786	65,270
Diluted (in shares)	65,299	65,967	65,664	66,050

Condensed Consolidated Statem_2

Condensed Consolidated Statements Of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Net income	$ 34,425	$ 18,482	$ 90,854	$ 44,236
Other comprehensive income (loss), net:
Unrealized gain on available-for-sale securities	0	0	0	386
Reclassification of realized gain on available-for-sale securities, net to net income	0	0	0	(757)
Change in defined benefit plans, net	158	202	472	581
Other comprehensive income (loss), net:	693	222	1,370	(953)
Comprehensive income	35,118	18,704	92,224	43,283
Comprehensive loss attributable to noncontrolling interest	(2)	(5)	(6)	(11)
Comprehensive income attributable to common stockholders	35,120	18,709	92,230	43,294
Foreign Exchange Contract
Other comprehensive income (loss), net:
Unrealized gain (loss) on cash flow hedges, net	0	173	0	531
Reclassifications of realized (gain) loss on cash flow hedges, net to net income	0	(244)	0	(238)
Interest Rate Swap
Other comprehensive income (loss), net:
Unrealized gain (loss) on cash flow hedges, net	(388)	(82)	341	(1,702)
Reclassifications of realized (gain) loss on cash flow hedges, net to net income	$ 923	$ 173	$ 557	$ 246

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Current assets:
Cash and cash equivalents	$ 276,599	$ 268,891
Accounts receivable, less allowances of $763 and $721, respectively	74,313	70,433
Inventories	105,159	87,494
Prepaid taxes	11,738	22,083
Other current assets	28,548	25,827
Total current assets	496,357	474,728
Non-current assets:
Property, plant and equipment, net of accumulated depreciation of $248,988 and $233,779, respectively	130,734	130,934
Deferred tax assets	26,928	25,483
Goodwill	351,141	351,141
Other intangible assets, net	7,852	11,746
Other assets	108,288	88,070
TOTAL ASSETS	1,121,300	1,082,102
Current liabilities:
Accounts payable	46,426	50,189
Accrued liabilities	77,483	59,384
Total current liabilities	123,909	109,573
Non-current liabilities:
Deferred tax liabilities	1,127	976
Long term debt	175,556	179,195
Other long-term liabilities	102,310	93,405
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.01 par value, 250,000,000 shares authorized, 78,136,144 issued and 64,399,241 outstanding and 78,136,144 issued and 65,098,379 outstanding, respectively	785	785
Treasury stock, at cost, 13,736,903 shares and 13,037,765 shares, respectively	(519,610)	(438,798)
Additional paid-in capital	481,761	473,728
Retained earnings	762,056	671,196
Accumulated other comprehensive loss	(6,798)	(8,168)
Total stockholders’ equity	718,194	698,743
Noncontrolling interest	204	210
Total equity	718,398	698,953
TOTAL LIABILITIES AND EQUITY	$ 1,121,300	$ 1,082,102

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 763	$ 721
Accumulated depreciation	$ 248,988	$ 233,779
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)	64,399,241	65,098,379
Treasury stock (in shares)	13,736,903	13,037,765

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. 26, 2020			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
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
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 Jan. 31, 2021	65,098,379		65,098,379
Beginning balance at Jan. 31, 2021	$ 698,953		$ 785	(438,798)	473,728	671,196		(8,168)	698,743		210
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	90,854					90,860			90,860		(6)
Other comprehensive income (loss)	1,370							1,370	1,370
Share-based compensation	37,819				37,819				37,819
Repurchase of common stock (in shares)			(1,387,624)
Repurchase of common stock	(97,000)			(97,000)					(97,000)
Treasury stock reissued (in shares)			688,486
Treasury stock reissued	$ (13,598)			16,188	(29,786)				(13,598)
Ending balance (in shares) at Oct. 31, 2021	64,399,241		64,399,241
Ending balance at Oct. 31, 2021	$ 718,398		$ 785	(519,610)	481,761	762,056		(6,798)	718,194		204
Beginning balance (in shares) at Aug. 01, 2021			64,396,741
Beginning balance at Aug. 01, 2021	708,623		$ 785	(499,199)	486,693	727,629		(7,491)	708,417		206
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	34,425					34,427			34,427		(2)
Other comprehensive income (loss)	693							693	693
Share-based compensation	13,289				13,289				13,289
Repurchase of common stock (in shares)			(387,163)
Repurchase of common stock	(30,000)			(30,000)					(30,000)
Treasury stock reissued (in shares)			389,663
Treasury stock reissued	$ (8,632)			9,589	(18,221)				(8,632)
Ending balance (in shares) at Oct. 31, 2021	64,399,241		64,399,241
Ending balance at Oct. 31, 2021	$ 718,398		$ 785	$ (519,610)	$ 481,761	$ 762,056		$ (6,798)	$ 718,194		$ 204

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020
Cash flows from operating activities:
Net income	$ 90,854	$ 44,236
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,686	21,283
Amortization of right-of-use assets	3,289	2,924
Investment impairments and credit loss reserves	930	5,450
Accretion of deferred financing costs and debt discount	361	362
Deferred income taxes	(1,540)	(7,121)
Share-based compensation	40,697	36,103
Gain on disposition of assets	(34)	(20)
Changes in the fair value of contingent earn-out obligations	0	(33)
Equity in net gains of equity method investments	(2,115)	(11)
Corporate-owned life insurance, net	4,720	4,197
Changes in assets and liabilities:
Accounts receivable, net	(3,880)	3,227
Inventories	(17,665)	(5,357)
Other assets	8,130	(15,109)
Accounts payable	(3,325)	157
Accrued liabilities	15,816	1,992
Other liabilities	(6,787)	(604)
Net cash provided by operating activities	152,137	91,676
Cash flows from investing activities:
Proceeds from sales of property, plant and equipment	82	20
Purchase of property, plant and equipment	(18,081)	(21,808)
Proceeds from sale of investments	0	327
Purchase of investments	(5,832)	(10,938)
Premiums paid for corporate-owned life insurance	(6,000)	0
Net cash used in investing activities	(29,831)	(32,399)
Cash flows from financing activities:
Proceeds from revolving line of credit	20,000	0
Payments of revolving line of credit	(24,000)	(12,000)
Deferred financing costs	0	(30)
Payment for employee share-based compensation payroll taxes	(17,885)	(16,957)
Proceeds from exercise of stock options	4,287	5,090
Repurchase of common stock	(97,000)	(66,433)
Net cash used in financing activities	(114,598)	(90,330)
Net increase (decrease) in cash and cash equivalents	7,708	(31,053)
Cash and cash equivalents at beginning of period	268,891	293,324
Cash and cash equivalents at end of period	276,599	262,271
Supplemental disclosure of cash flow information:
Interest paid	3,237	4,976
Income taxes paid	2,989	8,086
Non-cash investing and financing activities:
Accounts payable related to capital expenditures	2,424	3,419
Conversion of notes into equity	$ 626	$ 0

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Oct. 31, 2021
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 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, although the first and second quarters of fiscal year 2022 end on the first Sunday of May and August, respectively. 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 2022 and 2021 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 31, 2021 ("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. Recently Adopted Accounting Guidance In December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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 adopted this guidance in the first quarter of fiscal year 2022. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

Earnings per Share

Earnings per Share	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share The computation of basic and diluted earnings per share was as follows: Three Months Ended Nine Months Ended (in thousands, except per share data) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Net income attributable to common stockholders $ 34,427 $ 18,487 $ 90,860 $ 44,247 Weighted-average shares outstanding–basic 64,546 65,136 64,786 65,270 Dilutive effect of share-based compensation 753 831 878 780 Weighted-average shares outstanding–diluted 65,299 65,967 65,664 66,050 Earnings per share: Basic $ 0.53 $ 0.28 $ 1.40 $ 0.68 Diluted $ 0.53 $ 0.28 $ 1.38 $ 0.67 Anti-dilutive shares not included in the above calculations 31 523 41 274 Diluted earnings per 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. 31, 2021
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Cost of sales $ 743 $ 654 $ 2,112 $ 1,734 Selling, general and administrative 12,528 9,404 26,985 24,864 Product development and engineering 4,070 3,480 11,600 9,505 Total share-based compensation $ 17,341 $ 13,538 $ 40,697 $ 36,103 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 31, 2021, the Company granted 731,563 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 Company's 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 31, 2021, the Company granted to the non-employee directors 11,898 restricted stock units that settle in cash and 11,898 restricted stock units that settle in shares. 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 grant 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 31, 2021, the Company granted 81,688 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 Market-Condition Restricted Stock Units In the nine months ended October 31, 2021, the Company granted an additional 54,928 restricted stock units with a different market condition. These additional awards are eligible to vest during the period commencing March 9, 2021, and ending March 5, 2024 (the "Performance Period") as follows: the restricted stock units covered by the award will vest if, during any consecutive 30 trading day period that commences and ends during the Performance Period, the average per-share closing price of the Company’s common stock equals or exceeds $95.00. The grant-date fair value per unit of the awards granted in the nine months ended October 31, 2021 was $49.55.

Available-for-sale securities

Available-for-sale securities	9 Months Ended
	Oct. 31, 2021
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 31, 2021 January 31, 2021 (in thousands) Fair Value Amortized Gross Fair Value Amortized Gross Convertible debt $ 11,677 $ 13,862 $ (2,185) $ 11,989 $ 13,244 $ (1,255) Total available-for-sale securities $ 11,677 $ 13,862 $ (2,185) $ 11,989 $ 13,244 $ (1,255) The following table summarizes the maturities of the Company’s available-for-sale securities: October 31, 2021 (in thousands) Fair Value Amortized Cost Within 1 year $ 10,466 $ 11,960 After 1 year through 5 years 1,211 1,902 Total available-for-sale securities $ 11,677 $ 13,862 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 maturities greater than one year were included in "Other assets" in the Balance Sheets.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2021
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 The fair values of financial assets and liabilities measured and recorded at fair value on a recurring basis were presented in the Balance Sheets as follows: October 31, 2021 January 31, 2021 (in thousands) Total (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Financial assets: Interest rate swap agreement $ 16 $ — $ 16 $ — $ — $ — $ — $ — Total return swap contracts 175 — 175 — — — — — Convertible debt 11,677 — — 11,677 11,989 — — 11,989 Total financial assets $ 11,868 $ — $ 191 $ 11,677 $ 11,989 $ — $ — $ 11,989 Financial liabilities: Interest rate swap agreement $ 654 $ — $ 654 $ — $ 1,782 $ — $ 1,782 $ — Total return swap contracts — — — — 167 — 167 — Total financial liabilities $ 654 $ — $ 654 $ — $ 1,949 $ — $ 1,949 $ — During the nine months ended October 31, 2021, the Company had no transfers of financial assets or liabilities between Level 1, Level 2 or Level 3. As of October 31, 2021 and January 31, 2021, 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 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 31, 2021: (in thousands) Balance at January 31, 2021 $ 11,989 Additions 450 Increase in credit loss reserve (930) Interest accrued 794 Conversion to equity (626) Balance at October 31, 2021 $ 11,677 The interest rate swap agreement is measured at fair value 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. The total return swap contracts are measured at fair value using quoted prices of the underlying investments (Level 2 inputs). The fair values of the total return swap contracts are recognized in the Balance Sheets in "Accrued Liabilities" if the instruments are in a loss position and in "Other Current Assets" if the instruments are in a gain position. 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 The total credit loss reserve for the Company's held-to-maturity debt securities and available-for-sale debt securities was $4.3 million and $3.4 million as of October 31, 2021 and January 31, 2021, respectively. During the three and nine months ended October 31, 2021, the Company increased its expected credit loss reserves by $0.2 million and $0.9 million, respectively, for its available-for-sale debt securities and did not record any impairments on its non-marketable equity investments. Upon the adoption of ASU 2016-13 in the first quarter of fiscal year 2021, the Company recorded expected credit loss reserves of $0.4 million related to its held-to-maturity debt securities. During the three and nine months ended October 25, 2020, the Company increased its expected credit loss reserves by $0.3 million and $2.7 million, respectively, for its held-to-maturity debt securities and available-for-sale debt securities in-part, due to the impact of the COVID-19 pandemic on early-stage development companies. Additionally, during the three and nine months ended October 25, 2020, the Company recorded zero and $2.9 million, respectively, of impairments on its non-marketable equity investments.

Inventories

Inventories	9 Months Ended
	Oct. 31, 2021
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 31, 2021 January 31, 2021 Raw materials $ 4,357 $ 2,936 Work in progress 72,551 59,523 Finished goods 28,251 25,035 Inventories $ 105,159 $ 87,494

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Oct. 31, 2021
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 31, 2021 $ 274,085 $ 72,128 $ 4,928 $ 351,141 Balance at October 31, 2021 $ 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 31, 2021, 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 and technology licenses purchased, which are amortized over their estimated useful lives: October 31, 2021 January 31, 2021 (in thousands, except estimated useful life) Estimated Gross Accumulated Net Carrying Gross Accumulated Net Carrying Core technologies 6-8 years $ 26,300 $ (18,448) $ 7,852 $ 29,300 $ (17,554) $ 11,746 Total finite-lived intangible assets $ 26,300 $ (18,448) $ 7,852 $ 29,300 $ (17,554) $ 11,746 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Core technologies $ 1,298 $ 1,798 $ 3,894 $ 6,069 Customer relationships — — — 589 Total amortization expense $ 1,298 $ 1,798 $ 3,894 $ 6,658 Future amortization expense of finite-lived intangible assets is expected as follows: (in thousands) Fiscal Year Ending: 2022 (remaining three months) $ 1,048 2023 4,002 2024 1,676 2025 288 2026 288 Thereafter 550 Total expected amortization expense $ 7,852

Long-Term Debt

Long-Term Debt	9 Months Ended
	Oct. 31, 2021
Debt Instruments [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt and the current period interest rates were as follows: (in thousands, except percentages) October 31, 2021 January 31, 2021 Revolving loans $ 177,000 $ 181,000 Debt issuance costs (1,444) (1,805) Total long-term debt, net of debt issuance costs $ 175,556 $ 179,195 Effective interest rate (1) 1.88 % 1.88 % (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 31, 2021, the effective interest rate is a weighted-average rate that represents (a) 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 (b) interest on the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.09% as of October 31, 2021, plus a margin of 1.25% (total variable rate of 1.34%). As of January 31, 2021, the effective interest rate is a weighted-average rate that represents (a) 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 (b) interest on the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.14% as of January 31, 2021, plus a margin of 1.25% (total variable rate of 1.39%). 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. The borrowing capacity of the revolving loans under the senior secured first lien credit facility (the "Credit Facility") is $600.0 million and matures on November 7, 2024. As of October 31, 2021, the Company had $177.0 million outstanding under its Credit Facility and $423.0 million of undrawn borrowing capacity, and the Company was in compliance with the covenants required under the Credit Facility. On August 11, 2021, the Company entered into an amendment to the Credit Agreement in order to, among other things, (i) provide for contractual fallback language for LIBOR replacement to reflect the Alternative Reference Rates Committee hardwired approach and (ii) incorporate certain provisions that clarify the rights of the administrative agent to recover from lenders or other secured parties erroneous payments made to such lenders or secured parties. Interest expense was comprised of the following components for the periods presented: Three Months Ended Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Contractual interest (1) $ 1,113 $ 888 $ 3,256 $ 3,457 Amortization of debt discount and issuance costs 120 120 361 362 Total interest expense $ 1,233 $ 1,008 $ 3,617 $ 3,819 (1) Contractual interest represents the interest on the Company's outstanding debt after giving effect to the interest rate swap agreement. As of October 31, 2021, 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. 31, 2021
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, withholding taxes on certain foreign earnings, excess tax benefits from share-based compensation 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 31, 2021 $ 26,850 Additions/(decreases) based on tax positions related to the current fiscal year 686 Additions/(decreases) based on tax positions related to the prior fiscal years (1,160) Balance at October 31, 2021 $ 26,376 Included in the balance of gross unrecognized tax benefits at October 31, 2021 and January 31, 2021 are $8.8 million and $9.7 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 31, 2021 January 31, 2021 Deferred tax assets - non-current $ 16,256 $ 15,770 Other long-term liabilities 8,754 9,731 Total accrued taxes $ 25,010 $ 25,501 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 United States ("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 in the U.S., 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 2020. 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 examinations cannot be predicted with certainty. If any issues addressed in the Company’s tax examinations 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Domestic $ (5,358) $ (2,054) $ (17,466) $ (19,065) Foreign 41,438 21,957 115,384 65,813 Total $ 36,080 $ 19,903 $ 97,918 $ 46,748

Leases

Leases	9 Months Ended
	Oct. 31, 2021
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Operating lease cost $ 1,441 $ 1,178 $ 4,265 $ 3,533 Short-term lease cost 302 — 805 — Sublease income (32) (35) (107) (102) Total lease cost $ 1,711 $ 1,143 $ 4,963 $ 3,431 Supplemental cash flow information related to leases was as follows: Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 Cash paid for amounts included in the measurement of lease liabilities $ 4,243 $ 3,546 Right-of-use assets obtained in exchange for new operating lease liabilities $ 7,677 $ 4,119 October 31, 2021 Weighted-average remaining lease term–operating leases (in years) 5.78 Weighted-average discount rate on remaining lease payments–operating leases 6.4 % Supplemental balance sheet information related to leases was as follows: (in thousands) October 31, 2021 January 31, 2021 Operating lease right-of-use assets in "Other assets" $ 20,713 $ 16,337 Operating lease liabilities in "Accrued liabilities" $ 3,933 $ 3,975 Operating lease liabilities in "Other long-term liabilities" 17,748 13,172 Total operating lease liabilities $ 21,681 $ 17,147 Maturities of lease liabilities as of October 31, 2021 are as follows: (in thousands) Fiscal Year Ending: 2022 (remaining three months) $ 1,357 2023 5,011 2024 4,651 2025 4,493 2026 3,488 Thereafter 6,930 Total lease payments 25,930 Less: imputed interest (4,249) Total $ 21,681

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2021
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. 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 $7.4 million and $8.0 million. To date, the Company has made $5.6 million in payments towards the remedial action plan and, as of October 31, 2021, has a remaining accrual of $1.8 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 also contain 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 31, 2021 January 31, 2021 Accrued liabilities $ 2,333 $ 1,709 Other long-term liabilities 46,488 39,299 Total deferred compensation liabilities under this plan $ 48,821 $ 41,008 The Company has purchased whole life insurance on the lives of certain current deferred compensation plan participants. This corporate-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 corporate-owned life insurance was $37.9 million and $27.6 million as of October 31, 2021 and January 31, 2021, respectively, and is included in "Other assets" in the Balance Sheets. The increase in the cash surrender value of the corporate-owned life insurance as of October 31, 2021 compared to January 31, 2021 was related to the overall increase in market value and $6.0 million of premiums paid in order to provide substantive coverage for the Company's deferred compensation liability. Earn-out Liability Pursuant to the terms of an amended arrangement with the former shareholders of Cycleo SAS, which the Company acquired in March 2012, earn-out payments are 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 fiscal years 2022 and 2021 for the remaining earn-out milestone pending the outcome or resolution of a dispute between the Company and the earn-out participants. Any payment that may be made for the remaining portion of the earn-out is not expected to be material.

Concentration of Risk

Concentration of Risk	9 Months Ended
	Oct. 31, 2021
Risks and Uncertainties [Abstract]
Concentration of Risk	Concentration of Risk The following significant customers accounted for at least 10% of the Company's net sales in one or more of the periods indicated: Three Months Ended Nine Months Ended (percentage of net sales) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Frontek Technology Corporation (and affiliates) 18 % 16 % 19 % 14 % Trend-tek Technology Ltd. (and affiliates) 18 % 16 % 17 % 17 % Arrow Electronics (and affiliates) 11 % 9 % 11 % 9 % CEAC International Limited 9 % 10 % 10 % 11 % The following table shows the customers that had an outstanding receivable balance that represented at least 10% of the Company's total net receivables as of one or more of the dates indicated: (percentage of net receivables) October 31, 2021 January 31, 2021 Frontek Technology Corporation (and affiliates) 21 % 10 % Arrow Electronics (and affiliates) 13 % 9 % Trend-tek Technology Ltd (and affiliates) 9 % 14 % CEAC International Limited 9 % 14 % Outside Subcontractors and Suppliers The Company relies on a limited number of third-party subcontractors and suppliers for the production of silicon wafers, packaging and certain other tasks. Disruption or termination of supply sources or subcontractors, including due to the COVID-19 pandemic or natural disasters such as an earthquake or other causes, have delayed and could in the future delay shipments and could have a material adverse effect on the Company. Although there are generally alternate sources for these materials and services, qualification of the alternate sources could cause delays sufficient to have a material adverse effect on the Company. A significant amount of the Company’s third-party subcontractors and suppliers, including third-party foundries that supply silicon wafers, are located in the U.S., Taiwan and China. A significant amount of the Company’s assembly and test operations are conducted by third-party contractors in China, Taiwan and Malaysia.

Segment Information

Segment Information	9 Months Ended
	Oct. 31, 2021
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s Chief Executive Officer 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Semiconductor Products Group $ 194,932 $ 154,082 $ 550,308 $ 430,444 Total $ 194,932 $ 154,082 $ 550,308 $ 430,444 The following table presents a reconciliation of operating income by segment to consolidated income before taxes and equity in net gains of equity method investments: Three Months Ended Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Semiconductor Products Group $ 56,957 $ 37,668 $ 148,578 $ 100,584 Operating income by segment 56,957 37,668 148,578 100,584 Items to reconcile segment operating income to consolidated income before taxes and equity in net gains of equity method investments: Share-based compensation 17,341 13,538 40,697 36,103 Intangible amortization 1,298 1,798 3,894 6,658 Investment impairments and credit loss reserves 216 335 930 5,450 Changes in the fair value of contingent earn-out obligations — — — (33) Restructuring and other reserves — — 16 502 Litigation cost, net of recoveries 434 558 1,534 809 Transaction and integration related 460 292 384 539 Interest expense 1,233 1,008 3,617 3,819 Non-operating (income) expense, net (105) 236 (412) (11) Income before taxes and equity in net gains of equity method investments $ 36,080 $ 19,903 $ 97,918 $ 46,748 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Signal Integrity $ 75,405 39 % $ 61,553 40 % $ 215,187 40 % $ 193,127 44 % Wireless and Sensing 63,123 32 % 51,145 33 % 184,223 33 % 122,933 29 % Protection 56,404 29 % 41,384 27 % 150,898 27 % 114,384 27 % Total net sales $ 194,932 100 % $ 154,082 100 % $ 550,308 100 % $ 430,444 100 % Information by Sales Channel (in thousands, except percentages) Three Months Ended Nine Months Ended October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Distributor $ 170,942 88 % $ 125,610 82 % $ 478,096 87 % $ 346,103 80 % Direct 23,990 12 % 28,472 18 % 72,212 13 % 84,341 20 % Total net sales $ 194,932 100 % $ 154,082 100 % $ 550,308 100 % $ 430,444 100 % Generally, the Company does not have long-term contracts with its distributors and most distributor agreements can be terminated by either party with short notice. For the third quarter of fiscal year 2022, 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Asia-Pacific 78 % 80 % 79 % 80 % North America 12 % 12 % 12 % 12 % Europe 10 % 8 % 9 % 8 % 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 China (including Hong Kong) 59 % 58 % 61 % 59 % United States 10 % 10 % 10 % 10 % Although a large percentage of the Company's products is shipped into the Asia-Pacific region, a significant number of the products produced by these customers and incorporating the Company's semiconductor products are then sold outside this region.

Stock Repurchase Program

Stock Repurchase Program	9 Months Ended
	Oct. 31, 2021
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 (in thousands, except number of shares) Shares Amount Paid Shares Amount Paid Shares Amount Paid Shares Amount Paid Shares repurchased under the stock repurchase program 387,163 $ 30,000 439,921 $ 24,046 1,387,624 $ 97,000 1,527,834 $ 66,433 On March 11, 2021, the Company's Board of Directors approved the expansion of the stock repurchase program by an additional $350.0 million. As of October 31, 2021, the Company had repurchased $506.2 million in shares of its common stock under the program since inception and the remaining authorization under the program was $292.2 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. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company is exposed to certain risks 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. As of October 31, 2021 and January 31, 2021, the Company had no outstanding foreign currency forward contracts. During 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 the first $150.0 million of the Company's debt outstanding under the Credit Facility 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 "Accumulated Other Comprehensive Income or Loss" 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 $0.9 million and $0.7 million for the three and nine months ended October 31, 2021, respectively. The realized loss on the interest rate swap agreement was $0.2 million and $0.3 million for the three and nine months ended October 25, 2020, respectively. 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 31, 2021 January 31, 2021 Interest rate swap agreement $ 16 $ — Total other long-term assets $ 16 $ — Interest rate swap agreement $ 654 $ 849 Total accrued liabilities $ 654 $ 849 Interest rate swap agreement $ — $ 933 Total other long-term liabilities $ — $ 933 During the fourth quarter of fiscal year 2021, the Company entered into an economic hedge program that uses total return swap contracts to hedge the market risk associated with the unfunded portion of the Company's deferred compensation liability. The total return swap contracts generally have a duration of one month and are rebalanced and re-hedged at the end of each monthly term. While the total returns swap contracts are treated as economic hedges, the Company has not designated them as hedges for accounting purposes. The total return swap contracts are measured at fair value and recognized in the Balance Sheets in "Accrued Liabilities" if the instruments are in a loss position and in "Other Current Assets" if the instruments are in a gain position. Unrealized gains and losses, as well as realized gains and losses for settlements, on the total return swap contracts are recognized in "Selling, general and administrative expenses" in the Statements of Income. As of October 31, 2021, the notional value of the total return swap contracts was $7.6 million and the fair value resulted in an asset balance of $0.2 million. As of January 31, 2021, the notional value of the total return swap contracts was $11.9 million and the fair value resulted in a liability balance of $0.2 million. The net gain recognized in earnings on the total return swap contracts was $0.4 million and $2.0 million for the three and nine months ended October 31, 2021, respectively.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	9 Months Ended
	Oct. 31, 2021
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, although the first and second quarters of fiscal year 2022 end on the first Sunday of May and August, respectively. 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 2022 and 2021 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 31, 2021 ("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 December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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 adopted this guidance in the first quarter of fiscal year 2022. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.
Earnings Per Share	Diluted earnings per 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 grant 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 risks 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. As of October 31, 2021 and January 31, 2021, the Company had no outstanding foreign currency forward contracts.

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	The computation of basic and diluted earnings per share was as follows: Three Months Ended Nine Months Ended (in thousands, except per share data) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Net income attributable to common stockholders $ 34,427 $ 18,487 $ 90,860 $ 44,247 Weighted-average shares outstanding–basic 64,546 65,136 64,786 65,270 Dilutive effect of share-based compensation 753 831 878 780 Weighted-average shares outstanding–diluted 65,299 65,967 65,664 66,050 Earnings per share: Basic $ 0.53 $ 0.28 $ 1.40 $ 0.68 Diluted $ 0.53 $ 0.28 $ 1.38 $ 0.67 Anti-dilutive shares not included in the above calculations 31 523 41 274

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Oct. 31, 2021
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Cost of sales $ 743 $ 654 $ 2,112 $ 1,734 Selling, general and administrative 12,528 9,404 26,985 24,864 Product development and engineering 4,070 3,480 11,600 9,505 Total share-based compensation $ 17,341 $ 13,538 $ 40,697 $ 36,103

Available-for-sale securities (

Available-for-sale securities (Tables)	9 Months Ended
	Oct. 31, 2021
Investments [Abstract]
Summary of Investments	The following table summarizes the values of the Company’s available-for-sale securities: October 31, 2021 January 31, 2021 (in thousands) Fair Value Amortized Gross Fair Value Amortized Gross Convertible debt $ 11,677 $ 13,862 $ (2,185) $ 11,989 $ 13,244 $ (1,255) Total available-for-sale securities $ 11,677 $ 13,862 $ (2,185) $ 11,989 $ 13,244 $ (1,255)
Schedule of Investments, Classified by Maturity Period	The following table summarizes the maturities of the Company’s available-for-sale securities: October 31, 2021 (in thousands) Fair Value Amortized Cost Within 1 year $ 10,466 $ 11,960 After 1 year through 5 years 1,211 1,902 Total available-for-sale securities $ 11,677 $ 13,862

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The fair values of financial assets and liabilities measured and recorded at fair value on a recurring basis were presented in the Balance Sheets as follows: October 31, 2021 January 31, 2021 (in thousands) Total (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Financial assets: Interest rate swap agreement $ 16 $ — $ 16 $ — $ — $ — $ — $ — Total return swap contracts 175 — 175 — — — — — Convertible debt 11,677 — — 11,677 11,989 — — 11,989 Total financial assets $ 11,868 $ — $ 191 $ 11,677 $ 11,989 $ — $ — $ 11,989 Financial liabilities: Interest rate swap agreement $ 654 $ — $ 654 $ — $ 1,782 $ — $ 1,782 $ — Total return swap contracts — — — — 167 — 167 — Total financial liabilities $ 654 $ — $ 654 $ — $ 1,949 $ — $ 1,949 $ —
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 31, 2021: (in thousands) Balance at January 31, 2021 $ 11,989 Additions 450 Increase in credit loss reserve (930) Interest accrued 794 Conversion to equity (626) Balance at October 31, 2021 $ 11,677

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Oct. 31, 2021
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 31, 2021 January 31, 2021 Raw materials $ 4,357 $ 2,936 Work in progress 72,551 59,523 Finished goods 28,251 25,035 Inventories $ 105,159 $ 87,494

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Oct. 31, 2021
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 31, 2021 $ 274,085 $ 72,128 $ 4,928 $ 351,141 Balance at October 31, 2021 $ 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 and technology licenses purchased, which are amortized over their estimated useful lives: October 31, 2021 January 31, 2021 (in thousands, except estimated useful life) Estimated Gross Accumulated Net Carrying Gross Accumulated Net Carrying Core technologies 6-8 years $ 26,300 $ (18,448) $ 7,852 $ 29,300 $ (17,554) $ 11,746 Total finite-lived intangible assets $ 26,300 $ (18,448) $ 7,852 $ 29,300 $ (17,554) $ 11,746
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Core technologies $ 1,298 $ 1,798 $ 3,894 $ 6,069 Customer relationships — — — 589 Total amortization expense $ 1,298 $ 1,798 $ 3,894 $ 6,658
Schedule of Future Amortization of Intangible Asset	Future amortization expense of finite-lived intangible assets is expected as follows: (in thousands) Fiscal Year Ending: 2022 (remaining three months) $ 1,048 2023 4,002 2024 1,676 2025 288 2026 288 Thereafter 550 Total expected amortization expense $ 7,852

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Oct. 31, 2021
Debt Instruments [Abstract]
Schedule of Long-term Debt	Long-term debt and the current period interest rates were as follows: (in thousands, except percentages) October 31, 2021 January 31, 2021 Revolving loans $ 177,000 $ 181,000 Debt issuance costs (1,444) (1,805) Total long-term debt, net of debt issuance costs $ 175,556 $ 179,195 Effective interest rate (1) 1.88 % 1.88 % (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 31, 2021, the effective interest rate is a weighted-average rate that represents (a) 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 (b) interest on the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.09% as of October 31, 2021, plus a margin of 1.25% (total variable rate of 1.34%). As of January 31, 2021, the effective interest rate is a weighted-average rate that represents (a) 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 (b) interest on the remainder of the debt outstanding at a variable rate based on the one-month LIBOR rate, which was 0.14% as of January 31, 2021, plus a margin of 1.25% (total variable rate of 1.39%).
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Contractual interest (1) $ 1,113 $ 888 $ 3,256 $ 3,457 Amortization of debt discount and issuance costs 120 120 361 362 Total interest expense $ 1,233 $ 1,008 $ 3,617 $ 3,819 (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. 31, 2021
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 31, 2021 $ 26,850 Additions/(decreases) based on tax positions related to the current fiscal year 686 Additions/(decreases) based on tax positions related to the prior fiscal years (1,160) Balance at October 31, 2021 $ 26,376
Liability For Uncertain Tax Positions	The liability for UTP is reflected in the Balance Sheets as follows: (in thousands) October 31, 2021 January 31, 2021 Deferred tax assets - non-current $ 16,256 $ 15,770 Other long-term liabilities 8,754 9,731 Total accrued taxes $ 25,010 $ 25,501
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Domestic $ (5,358) $ (2,054) $ (17,466) $ (19,065) Foreign 41,438 21,957 115,384 65,813 Total $ 36,080 $ 19,903 $ 97,918 $ 46,748

Leases (Tables)

Leases (Tables)	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Lease, Cost	The components of lease expense were as follows: Three Months Ended Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Operating lease cost $ 1,441 $ 1,178 $ 4,265 $ 3,533 Short-term lease cost 302 — 805 — Sublease income (32) (35) (107) (102) Total lease cost $ 1,711 $ 1,143 $ 4,963 $ 3,431 Supplemental cash flow information related to leases was as follows: Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 Cash paid for amounts included in the measurement of lease liabilities $ 4,243 $ 3,546 Right-of-use assets obtained in exchange for new operating lease liabilities $ 7,677 $ 4,119 October 31, 2021 Weighted-average remaining lease term–operating leases (in years) 5.78 Weighted-average discount rate on remaining lease payments–operating leases 6.4 %
Assets And Liabilities, Lessee	Supplemental balance sheet information related to leases was as follows: (in thousands) October 31, 2021 January 31, 2021 Operating lease right-of-use assets in "Other assets" $ 20,713 $ 16,337 Operating lease liabilities in "Accrued liabilities" $ 3,933 $ 3,975 Operating lease liabilities in "Other long-term liabilities" 17,748 13,172 Total operating lease liabilities $ 21,681 $ 17,147
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities as of October 31, 2021 are as follows: (in thousands) Fiscal Year Ending: 2022 (remaining three months) $ 1,357 2023 5,011 2024 4,651 2025 4,493 2026 3,488 Thereafter 6,930 Total lease payments 25,930 Less: imputed interest (4,249) Total $ 21,681

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Oct. 31, 2021
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 31, 2021 January 31, 2021 Accrued liabilities $ 2,333 $ 1,709 Other long-term liabilities 46,488 39,299 Total deferred compensation liabilities under this plan $ 48,821 $ 41,008

Concentration of Risk (Tables)

Concentration of Risk (Tables)	9 Months Ended
	Oct. 31, 2021
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 the Company's net sales in one or more of the periods indicated: Three Months Ended Nine Months Ended (percentage of net sales) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Frontek Technology Corporation (and affiliates) 18 % 16 % 19 % 14 % Trend-tek Technology Ltd. (and affiliates) 18 % 16 % 17 % 17 % Arrow Electronics (and affiliates) 11 % 9 % 11 % 9 % CEAC International Limited 9 % 10 % 10 % 11 % The following table shows the customers that had an outstanding receivable balance that represented at least 10% of the Company's total net receivables as of one or more of the dates indicated: (percentage of net receivables) October 31, 2021 January 31, 2021 Frontek Technology Corporation (and affiliates) 21 % 10 % Arrow Electronics (and affiliates) 13 % 9 % Trend-tek Technology Ltd (and affiliates) 9 % 14 % CEAC International Limited 9 % 14 %

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Oct. 31, 2021
Segment Reporting [Abstract]
Net Sales by Segment	Net sales by segment were as follows: Three Months Ended Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Semiconductor Products Group $ 194,932 $ 154,082 $ 550,308 $ 430,444 Total $ 194,932 $ 154,082 $ 550,308 $ 430,444
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 and equity in net gains of equity method investments: Three Months Ended Nine Months Ended (in thousands) October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Semiconductor Products Group $ 56,957 $ 37,668 $ 148,578 $ 100,584 Operating income by segment 56,957 37,668 148,578 100,584 Items to reconcile segment operating income to consolidated income before taxes and equity in net gains of equity method investments: Share-based compensation 17,341 13,538 40,697 36,103 Intangible amortization 1,298 1,798 3,894 6,658 Investment impairments and credit loss reserves 216 335 930 5,450 Changes in the fair value of contingent earn-out obligations — — — (33) Restructuring and other reserves — — 16 502 Litigation cost, net of recoveries 434 558 1,534 809 Transaction and integration related 460 292 384 539 Interest expense 1,233 1,008 3,617 3,819 Non-operating (income) expense, net (105) 236 (412) (11) Income before taxes and equity in net gains of equity method investments $ 36,080 $ 19,903 $ 97,918 $ 46,748
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Signal Integrity $ 75,405 39 % $ 61,553 40 % $ 215,187 40 % $ 193,127 44 % Wireless and Sensing 63,123 32 % 51,145 33 % 184,223 33 % 122,933 29 % Protection 56,404 29 % 41,384 27 % 150,898 27 % 114,384 27 % Total net sales $ 194,932 100 % $ 154,082 100 % $ 550,308 100 % $ 430,444 100 %
Schedule of Revenue from External Customers by Sales Channel	(in thousands, except percentages) Three Months Ended Nine Months Ended October 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Distributor $ 170,942 88 % $ 125,610 82 % $ 478,096 87 % $ 346,103 80 % Direct 23,990 12 % 28,472 18 % 72,212 13 % 84,341 20 % Total net sales $ 194,932 100 % $ 154,082 100 % $ 550,308 100 % $ 430,444 100 %
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 Asia-Pacific 78 % 80 % 79 % 80 % North America 12 % 12 % 12 % 12 % Europe 10 % 8 % 9 % 8 % 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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 China (including Hong Kong) 59 % 58 % 61 % 59 % United States 10 % 10 % 10 % 10 %

Stock Repurchase Program (Table

Stock Repurchase Program (Tables)	9 Months Ended
	Oct. 31, 2021
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 31, 2021 October 25, 2020 October 31, 2021 October 25, 2020 (in thousands, except number of shares) Shares Amount Paid Shares Amount Paid Shares Amount Paid Shares Amount Paid Shares repurchased under the stock repurchase program 387,163 $ 30,000 439,921 $ 24,046 1,387,624 $ 97,000 1,527,834 $ 66,433

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Oct. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
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 31, 2021 January 31, 2021 Interest rate swap agreement $ 16 $ — Total other long-term assets $ 16 $ — Interest rate swap agreement $ 654 $ 849 Total accrued liabilities $ 654 $ 849 Interest rate swap agreement $ — $ 933 Total other long-term liabilities $ — $ 933

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. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 34,427	$ 18,487	$ 90,860	$ 44,247
Weighted average common shares outstanding - basic (in shares)	64,546	65,136	64,786	65,270
Dilutive effect of share-based compensation (in shares)	753	831	878	780
Weighted average common shares outstanding - diluted (in shares)	65,299	65,967	65,664	66,050
Basic earnings per common share (in dollars per share)	$ 0.53	$ 0.28	$ 1.40	$ 0.68
Diluted earnings per common share (in dollars per share)	$ 0.53	$ 0.28	$ 1.38	$ 0.67
Anti-dilutive shares not included in the above calculations (in shares)	31	523	41	274

Share-Based Compensation - Allo

Share-Based Compensation - Allocation of Share-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 17,341	$ 13,538	$ 40,697	$ 36,103
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	743	654	2,112	1,734
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	12,528	9,404	26,985	24,864
Product development and engineering
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 4,070	$ 3,480	$ 11,600	$ 9,505

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details)	9 Months Ended
	Oct. 31, 2021$ / sharesshares
Market Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units) | shares	81,688
Restricted Stock Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Equity awards granted (in units) | shares	731,563
Market Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units) | shares	54,928
Grant date fair value per unit (in dollars per share) | $ / shares	$ 49.55
Performance period	30 days
Target share price (in dollars per share) | $ / shares	$ 95
Restricted Stock Units (RSUs), Cash Settlement | Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units) | shares	11,898
Restricted Stock Units (RSUs), Share Settlement | Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted (in units) | shares	11,898
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	$ 67.41
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	$ 77.99
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	$ 84.17

Available-for-sale securities -

Available-for-sale securities - Summary Of Investments (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 11,677	$ 11,989
Total available-for-sale securities	13,862	13,244
Gross Unrealized Gain/(Loss)	(2,185)	(1,255)
Convertible debt
Debt Securities, Available-for-sale [Line Items]
Fair Value	11,677	11,989
Total available-for-sale securities	13,862	13,244
Gross Unrealized Gain/(Loss)	$ (2,185)	$ (1,255)

Available-for-sale securities_2

Available-for-sale securities - Summary of Maturities of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Fair Value
Within 1 year	$ 10,466
After 1 year through 5 years	1,211
Total available-for-sale securities	11,677	$ 11,989
Amortized Cost
Within 1 year	11,960
After 1 year through 5 years	1,902
Total available-for-sale securities	$ 13,862	$ 13,244

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. 31, 2021	Jan. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	$ 11,677	$ 11,989
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	11,868	11,989
Total financial liabilities	654	1,949
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	191	0
Total financial liabilities	654	1,949
Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total financial assets	11,677	11,989
Total financial liabilities	0	0
Fair Value, Measurements, Recurring | Convertible debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt	11,677	11,989
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	11,677	11,989
Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	16	0
Financial liabilities	654	1,782
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	0	0
Financial liabilities	0	0
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	16	0
Financial liabilities	654	1,782
Interest Rate Swap | Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	0	0
Financial liabilities	0	0
Total Return Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	175	0
Financial liabilities	0	167
Total Return Swap | Fair Value, Measurements, Recurring | (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	0	0
Financial liabilities	0	0
Total Return Swap | Fair Value, Measurements, Recurring | (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	175	0
Financial liabilities	0	167
Total Return Swap | Fair Value, Measurements, Recurring | (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	0	0
Financial liabilities	$ 0	$ 0

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Changes in Debt Securities (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2021USD ($)
Debt Securities, Available For Sale, Reconciliation [Roll Forward]
Balance at January 31, 2021	$ 11,989
Additions	450
Increase in credit loss reserve	(930)
Interest accrued	794
Conversion to equity	(626)
Balance at October 31, 2021	$ 11,677

Fair Value Measurements - Inves

Fair Value Measurements - Investment Impairments and Credit Loss Reserves (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020	Jan. 31, 2021	Jan. 26, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Credit loss reserve for held-to-maturity debt securities and available for sale debt securities	$ 4,300,000		$ 4,300,000		$ 3,400,000
Increase in credit loss reserve for available-for-sale and held-to-maturity debt securities	$ 200,000	$ 300,000	$ 900,000	$ 2,700,000
Impairment on non-marketable equity securities		$ 0		$ 2,900,000
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						$ 400,000

Inventories - Summary of Invent

Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 4,357	$ 2,936
Work in progress	72,551	59,523
Finished goods	28,251	25,035
Inventories	$ 105,159	$ 87,494

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes in Carrying Amounts of Goodwill (Details) - USD ($)	9 Months Ended
	Oct. 31, 2021	Jan. 31, 2021
Goodwill [Line Items]
Goodwill balance	$ 351,141,000	$ 351,141,000
Goodwill, impairment loss	0
Signal Integrity
Goodwill [Line Items]
Goodwill balance	274,085,000	274,085,000
Wireless and Sensing
Goodwill [Line Items]
Goodwill balance	72,128,000	72,128,000
Protection
Goodwill [Line Items]
Goodwill balance	$ 4,928,000	$ 4,928,000

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Jan. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 26,300	$ 29,300
Accumulated Amortization	(18,448)	(17,554)
Total expected amortization expense	7,852	11,746
Core technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,300	29,300
Accumulated Amortization	(18,448)	(17,554)
Total expected amortization expense	$ 7,852	$ 11,746
Core technologies | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	6 years
Core technologies | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years

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. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 1,298	$ 1,798	$ 3,894	$ 6,658
Core technologies
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	1,298	1,798	3,894	6,069
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 0	$ 0	$ 0	$ 589

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
2022 (remaining three months)	$ 1,048
2023	4,002
2024	1,676
2025	288
2026	288
Thereafter	550
Total expected amortization expense	$ 7,852	$ 11,746

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	May 02, 2021	Oct. 31, 2021	Jan. 31, 2021
Debt Instrument [Line Items]
Debt issuance costs		$ (1,444)	$ (1,805)
Total long-term debt, net of debt issuance costs		$ 175,556	$ 179,195
Effective interest rate		1.88%	1.88%
Revolving loans
Debt Instrument [Line Items]
Total debt		$ 177,000	$ 181,000
Debt amount bearing fixed interest rate		$ 150,000	$ 150,000
Fixed interest rate		1.9775%	1.9775%
LIBOR portion of fixed rate	0.7275%	0.7275%
Variable rate at end of period		1.34%	1.39%
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%	1.25%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details) - Revolving loans - USD ($)	Oct. 31, 2021	Jan. 31, 2021	Nov. 07, 2019
Facilities, maximum borrowing capacity			$ 600,000,000
Amounts outstanding	$ 177,000,000	$ 181,000,000
Undrawn capacity	$ 423,000,000

Long-Term Debt - Schedule of In

Long-Term Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Debt Disclosure [Abstract]
Contractual interest	$ 1,113	$ 888	$ 3,256	$ 3,457
Amortization of debt discount and issuance costs	120	120	361	362
Total interest expense	$ 1,233	$ 1,008	$ 3,617	$ 3,819

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Contingencies (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2021USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 31, 2021	$ 26,850
Additions/(decreases) based on tax positions related to the current fiscal year	686
Additions/(decreases) based on tax positions related to the prior fiscal years	(1,160)
Balance at October 31, 2021	$ 26,376

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	Oct. 31, 2021	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Net tax benefits, if recognized, would impact the effective tax rate	$ 8.8	$ 9.7

Income Taxes - Liability For Un

Income Taxes - Liability For Uncertain Tax Positions (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Income Tax Contingency [Line Items]
Total accrued taxes	$ 25,010	$ 25,501
Deferred tax assets - non-current
Income Tax Contingency [Line Items]
Total accrued taxes	16,256	15,770
Other long-term liabilities
Income Tax Contingency [Line Items]
Total accrued taxes	$ 8,754	$ 9,731

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. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Income Tax Disclosure [Abstract]
Domestic	$ (5,358)	$ (2,054)	$ (17,466)	$ (19,065)
Foreign	41,438	21,957	115,384	65,813
Income before taxes and equity in net gains of equity method investments	$ 36,080	$ 19,903	$ 97,918	$ 46,748

Leases - Narrative (Details)

Leases - Narrative (Details)	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Remaining lease term–operating leases	10 years
Maximum renewal term	5 years
Termination period	1 year

Leases - The Components of Leas

Leases - The Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Leases [Abstract]
Operating lease cost	$ 1,441	$ 1,178	$ 4,265	$ 3,533
Short-term lease cost	302	0	805	0
Sublease income	(32)	(35)	(107)	(102)
Total lease cost	$ 1,711	$ 1,143	$ 4,963	$ 3,431

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 4,243	$ 3,546
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 7,677	$ 4,119
Weighted-average remaining lease term–operating leases (in years)	5 years 9 months 10 days
Weighted-average discount rate on remaining lease payments–operating leases	6.40%

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities
Operating lease right-of-use assets in "Other assets"	$ 20,713	$ 16,337
Operating lease liabilities in "Accrued liabilities"	3,933	3,975
Operating lease liabilities in "Other long-term liabilities"	17,748	13,172
Total operating lease liabilities	$ 21,681	$ 17,147

Leases - Maturity (Details)

Leases - Maturity (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Leases [Abstract]
2022 (remaining three months)	$ 1,357
2023	5,011
2024	4,651
2025	4,493
2026	3,488
Thereafter	6,930
Total lease payments	25,930
Less: imputed interest	(4,249)
Total	$ 21,681	$ 17,147

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Jan. 31, 2021
Commitments and Contingencies [Line Items]
Premiums paid for corporate-owned life insurance	$ 6	$ 0
Environmental Issue
Commitments and Contingencies [Line Items]
Loss contingency, estimate of probable loss	1.8
Aggregate payments towards remediation plan to date	5.6
Minimum | Environmental Issue
Commitments and Contingencies [Line Items]
Loss contingency, estimate of probable loss	7.4
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	$ 37.9		$ 27.6

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. 31, 2021	Jan. 31, 2021
Loss Contingencies [Line Items]
Total deferred compensation liabilities under this plan	$ 48,821	$ 41,008
Accrued liabilities
Loss Contingencies [Line Items]
Accrued liabilities	2,333	1,709
Other long-term liabilities
Loss Contingencies [Line Items]
Other long-term liabilities	$ 46,488	$ 39,299

Concentration of Risk - Schedul

Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales During Period (Details) - Customer Concentration Risk	Jan. 31, 2021	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Net sales | Frontek Technology Corporation (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage		18.00%	16.00%	19.00%	14.00%
Net sales | Trend-tek Technology Ltd. (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage		18.00%	16.00%	17.00%	17.00%
Net sales | Arrow Electronics (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage		11.00%	9.00%	11.00%	9.00%
Net sales | CEAC International Limited
Concentration Risk [Line Items]
Concentration risk, percentage		9.00%	10.00%	10.00%	11.00%
Accounts Receivable | Frontek Technology Corporation (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%			21.00%
Accounts Receivable | Trend-tek Technology Ltd. (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%			9.00%
Accounts Receivable | Arrow Electronics (and affiliates)
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%			13.00%
Accounts Receivable | CEAC International Limited
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%			9.00%

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
	Oct. 31, 2021operating_segmentreportable_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. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Revenue from External Customer [Line Items]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444
Semiconductor Products Group
Revenue from External Customer [Line Items]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444

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. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Segment Reporting Information [Line Items]
Operating income (loss)	$ 37,424	$ 21,482	$ 102,053	$ 56,006
Items to reconcile segment operating income to consolidated income before taxes and equity in net gains of equity method investments:
Share-based compensation	17,341	13,538	40,697	36,103
Intangible amortization	1,298	1,798	3,894	6,658
Investment impairments and credit loss reserves	216	335	930	5,450
Changes in the fair value of contingent earn-out obligations	0	0	0	(33)
Interest expense	1,233	1,008	3,617	3,819
Non-operating (income) expense, net	(105)	236	(412)	(11)
Income before taxes and equity in net gains of equity method investments	36,080	19,903	97,918	46,748
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	56,957	37,668	148,578	100,584
Corporate, Non-Segment
Items to reconcile segment operating income to consolidated income before taxes and equity in net gains of equity method investments:
Share-based compensation	17,341	13,538	40,697	36,103
Intangible amortization	1,298	1,798	3,894	6,658
Investment impairments and credit loss reserves	216	335	930	5,450
Changes in the fair value of contingent earn-out obligations	0	0	0	(33)
Restructuring and other reserves	0	0	16	502
Litigation cost, net of recoveries	434	558	1,534	809
Transaction and integration related	460	292	384	539
Interest expense	1,233	1,008	3,617	3,819
Non-operating (income) expense, net	(105)	236	(412)	(11)
Semiconductor Products Group
Segment Reporting Information [Line Items]
Operating income (loss)	$ 56,957	$ 37,668	$ 148,578	$ 100,584

Segment Information - Revenue b

Segment Information - Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Revenue from External Customer [Line Items]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444
Signal Integrity
Revenue from External Customer [Line Items]
Net sales	75,405	61,553	215,187	193,127
Wireless and Sensing
Revenue from External Customer [Line Items]
Net sales	63,123	51,145	184,223	122,933
Protection
Revenue from External Customer [Line Items]
Net sales	$ 56,404	$ 41,384	$ 150,898	$ 114,384
Net sales | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales | Signal Integrity | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage	39.00%	40.00%	40.00%	44.00%
Net sales | Wireless and Sensing | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage	32.00%	33.00%	33.00%	29.00%
Net sales | Protection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage	29.00%	27.00%	27.00%	27.00%

Segment Information - Revenue_2

Segment Information - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444
Net sales | Sales Channel Concentration Risk
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	$ 170,942	$ 125,610	$ 478,096	$ 346,103
Distributor | Net sales | Sales Channel Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	88.00%	82.00%	87.00%	80.00%
Direct
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 23,990	$ 28,472	$ 72,212	$ 84,341
Direct | Net sales | Sales Channel Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	18.00%	13.00%	20.00%

Segment Information - Net Sal_2

Segment Information - Net Sales Activity by Geographic Region (Details) - Net sales - Geographic Concentration Risk	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	78.00%	80.00%	79.00%	80.00%
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	12.00%	12.00%	12.00%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.00%	8.00%	9.00%	8.00%

Segment Information - Summary o

Segment Information - Summary of Sales Activity to Countries that Represented Greater than 10% of Total Net Sales (Details) - Geographic Concentration Risk - Net sales	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
China (including Hong Kong)
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	59.00%	58.00%	61.00%	59.00%
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	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Equity, Class of Treasury Stock [Line Items]
Shares repurchased under the stock repurchase program, value	$ 30,000	$ 24,046	$ 97,000	$ 66,433
Shares repurchased under the stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased under the stock repurchase program (in shares)	387,163	439,921	1,387,624	1,527,834
Shares repurchased under the stock repurchase program, value	$ 30,000	$ 24,046	$ 97,000	$ 66,433

Stock Repurchase Program - Narr

Stock Repurchase Program - Narrative (Details) - USD ($) $ in Millions	Mar. 11, 2021	Oct. 31, 2021
Equity [Abstract]
Additional stock repurchase amount authorized	$ 350
Shares repurchased to date, value		$ 506.2
Remaining authorization under stock repurchase program		$ 292.2

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020	Jan. 31, 2021
Revolving loans
Derivative [Line Items]
Debt amount bearing fixed interest rate	$ 150		$ 150		$ 150
Fixed interest rate	1.9775%		1.9775%		1.9775%
Interest Rate Swap
Derivative [Line Items]
Derivative term		3 years
Realized gain (loss) on hedging	$ (0.9)	$ (0.2)	$ (0.7)	$ (0.3)
Total Return Swap
Derivative [Line Items]
Realized gain (loss) on hedging	0.4		2
Derivative, notional value	7.6		7.6		$ 11.9
Derivative, fair value, net	$ 0.2		$ 0.2		$ (0.2)

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Summary of the Carrying Values of Derivative Instruments (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset	$ 16	$ 0
Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	654	849
Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	0	933
Interest Rate Swap | Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset	16	0
Interest Rate Swap | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	654	849
Interest Rate Swap | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	$ 0	$ 933

Uncategorized Items - smtc-2021

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]