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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Income (Loss) Before Income Taxes Income before income taxes for the years ended December 31, 2021, 2020 and 2019 was derived from the following sources:
(In thousands)202120202019
Domestic$137,145 $86,572 $145,215 
Foreign341,931 267,715 172,834 
Income before income tax expense$479,076 $354,287 $318,049 
Components of Income Tax Expense Income tax expense for the years ended December 31, 2021, 2020 and 2019 is summarized as follows:
(In thousands)202120202019
Current:
Federal$9,187 $8,107 $35,497 
State2,939 1,151 2,625 
Foreign76,257 57,310 39,075 
88,383 66,568 77,197 
Deferred (net of valuation allowance):
Federal(11,726)(592)(10,966)
State(498)(407)(1,018)
Foreign(6,209)(6,251)(2,024)
(18,433)(7,250)(14,008)
Income tax expense $69,950 $59,318 $63,189 
Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates Income tax expense differs from the expected amounts based upon the statutory federal tax rates for the years ended December 31, 2021, 2020 and 2019 as follows:
(In thousands)202120202019
Expected federal income tax at statutory rate$100,606 $74,400 $66,790 
State income taxes before valuation allowance, net of federal tax effect(1,333)(1,539)(1,563)
Effect of foreign source income(15,862)(7,877)(1,362)
Tax contingencies4,696 1,688 1,785 
Valuation allowance9,984 9,281 2,051 
U.S. federal research credit(8,469)(7,204)(6,514)
Equity compensation(8,899)(8,231)(1,411)
Foreign derived intangible income(6,496)(1,153)(7,851)
Legal entity restructuring capital loss(5,079)— — 
Legal entity restructuring dividends received deduction— — 9,398 
Other items, net802 (47)1,866 
Income tax expense $69,950 $59,318 $63,189 
Deferred Tax Assets And Deferred Tax Liabilities The significant components of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2021 and 2020 are as follows:
(In thousands)20212020
Deferred tax assets attributable to:
Accounts receivable$397 $436 
Inventory6,510 4,566 
Accruals not currently deductible for tax purposes19,636 12,828 
Net operating loss and credit carryforwards42,599 33,347 
Capital loss carryforward485 — 
Equity compensation2,630 3,001 
Asset impairments— 452 
Other, net7,786 6,212 
Gross deferred tax assets80,043 60,842 
Valuation allowance(39,383)(29,399)
Total deferred tax assets40,660 31,443 
Deferred tax liabilities attributable to:
Purchased intangible assets(33,887)(38,083)
Depreciation(9,102)(13,276)
Total deferred tax liabilities(42,989)(51,359)
Net deferred tax liabilities$(2,329)$(19,916)
Reconciliations of Total Amount of Gross Unrecognized Tax Benefits Reconciliations of the beginning and ending balances of the total amounts of gross unrecognized tax benefits for the years ended December 31, 2021 and 2020 are as follows:
(In thousands)20212020
Gross unrecognized tax benefits at beginning of year$17,395 $16,194 
Increase in tax positions from prior years131 412 
Decrease in tax positions from prior years(69)(453)
Increases in tax positions for current year8,476 3,463 
Settlement of tax positions for current year(286)(532)
Lapse in statute of limitations(1,858)(1,689)
Gross unrecognized tax benefits at end of year$23,789 $17,395