Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

	Year Ended December 31,
	2023			2022			2021
United States	$	(15,066	)	$	(30,190	)	$	(15,542	)
Foreign		520,907			555,127			287,761
Income before income taxes	$	505,841		$	524,937		$	272,219

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2023			2022			2021
Current:
Federal	$	61,064		$	95,176		$	24,955
State		4,257			12			35
Foreign		5,702			5,019			3,801
Deferred:
Federal		(1,705	)		(8,523	)		4,929
State		(744	)		-			-
Foreign		9,893			(4,419	)		(3,524	)
Income tax expense	$	78,467		$	87,265		$	30,196

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2023			2022			2021
U.S. statutory federal tax rate		21.0	%		21.0	%		21.0	%
Foreign income at lower rates		(21.9	)		(22.8	)		(23.2	)
GILTI		13.5			16.0			11.4
Changes in valuation allowance		2.9			0.2			0.5
Stock-based compensation		2.2			2.8			1.6
Return to provision true-up adjustment		(2.0	)		-			(1.1	)
Tax credits, net of reserves		(1.1	)		(1.2	)		(0.5	)
State income taxes		-			(0.2	)		1.6
Other adjustments		0.9			0.8			(0.2	)
Effective tax rate		15.5	%		16.6	%		11.1	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2023			2022
Deferred tax assets:
Tax credits	$	37,518		$	32,037
Stock-based compensation		3,404			2,900
Deferred compensation		11,126			9,844
Net operating losses		12,115			9,000
Other expenses not currently deductible		7,755			8,891
Deferred tax assets, gross		71,918			62,672
Valuation allowance		(35,008	)		(20,321	)
Deferred tax assets, net of valuation allowance		36,910			42,351
Deferred tax liabilities:
Depreciation and amortization		(6,420	)		(5,927	)
Undistributed foreign earnings		(817	)		(358	)
Other expenses currently deductible		(1,619	)		(814	)
Deferred tax liabilities		(8,856	)		(7,099	)
Net deferred tax assets	$	28,054		$	35,252

Summary of Valuation Allowance [Table Text Block]

Period	Balance at Beginning of Period		Additions		Reductions			Balance at End of Period
Year ended December 31, 2021	$	18,190	$	1,560	$	(230	)	$	19,520
Year ended December 31, 2022	$	19,520	$	1,743	$	(942	)	$	20,321
Year ended December 31, 2023	$	20,321	$	15,405	$	(718	)	$	35,008

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

Balance as of January 1, 2021	$	33,499
Increase for tax position of current year		9,191
Decrease for tax position of prior year		(657	)
Decrease due to settlement with tax authorities		(54	)
Decrease due to lapse of statute of limitation		(458	)
Balance as of December 31, 2021		41,521
Increase for tax position of current year		10,965
Increase for tax position of prior year		247
Decrease due to settlement with tax authorities		(970	)
Decrease due to lapse of statute of limitation		(2,486	)
Balance as of December 31, 2022		49,277
Increase for tax position of current year		14,108
Increase for tax position of prior year		2,209
Decrease due to lapse of statute of limitation		(1,926	)
Decrease for tax positions of prior year		(1,008	)
Balance as of December 31, 2023	$	62,660