Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Voting [Member]	Additional Paid-In Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2022	$ 1,081,093	$ 123	$ 345,468	$ (328,326)	$ 1,101,525	$ (37,697)
Net Income (Loss)	73,628				73,628
Cumulative translation adjustment	5,755					5,755
Unrealized net gain (loss) on securities available-for-sale, net of tax	(41)					(41)
Stock-based compensation	7,488		7,488
Exercise of stock options	707		707
Withholding tax payments on full value awards vesting and stock option exercises	(20,492)		(20,492)
Reissuance of treasury stock	454		(57)	511
Cash dividend on common stock	(27,060)				(27,060)
Ending Balance at Mar. 31, 2023	1,121,532	123	333,114	(327,815)	1,148,093	(31,983)
Beginning Balance at Dec. 31, 2022	1,081,093	123	345,468	(328,326)	1,101,525	(37,697)
Net Income (Loss)	133,487
Cumulative translation adjustment	9,961
Ending Balance at Jun. 30, 2023	1,165,092	123	339,867	(327,815)	1,180,820	(27,903)
Beginning Balance at Mar. 31, 2023	1,121,532	123	333,114	(327,815)	1,148,093	(31,983)
Net Income (Loss)	59,859				59,859
Cumulative translation adjustment	4,206					4,206
Unrealized net gain (loss) on securities available-for-sale, net of tax	(126)					(126)
Stock-based compensation	6,890		6,890
Exercise of stock options	18		18
Withholding tax payments on full value awards vesting and stock option exercises	(155)		(155)
Cash dividend on common stock	(27,132)				(27,132)
Ending Balance at Jun. 30, 2023	1,165,092	123	339,867	(327,815)	1,180,820	(27,903)
Beginning Balance at Dec. 31, 2023	1,292,963	123	333,292	(260,298)	1,244,216	(24,370)
Net Income (Loss)	72,615				72,615
Cumulative translation adjustment	(4,241)					(4,241)
Unrealized net gain (loss) on securities available-for-sale, net of tax	(40)					(40)
Stock-based compensation	7,298		7,298
Exercise of stock options	1,977		1,977
Withholding tax payments on full value awards vesting and stock option exercises	(14,893)		(14,893)
Reissuance of treasury stock	704		(155)	1,440	(581)
Repurchases of common stock	(10,147)			(10,147)
Cash dividend on common stock	(28,003)				(28,003)
Ending Balance at Mar. 31, 2024	1,318,233	123	327,519	(269,005)	1,288,247	(28,651)
Beginning Balance at Dec. 31, 2023	1,292,963	123	333,292	(260,298)	1,244,216	(24,370)
Net Income (Loss)	137,553
Cumulative translation adjustment	(4,804)
Ending Balance at Jun. 30, 2024	1,329,221	123	335,641	(302,455)	1,325,139	(29,227)
Beginning Balance at Mar. 31, 2024	1,318,233	123	327,519	(269,005)	1,288,247	(28,651)
Net Income (Loss)	64,938				64,938
Cumulative translation adjustment	(563)					(563)
Unrealized net gain (loss) on securities available-for-sale, net of tax	(13)					(13)
Stock-based compensation	8,328		8,328
Withholding tax payments on full value awards vesting and stock option exercises	(206)		(206)
Repurchases of common stock	(33,450)			(33,450)
Cash dividend on common stock	(28,046)				(28,046)
Ending Balance at Jun. 30, 2024	$ 1,329,221	$ 123	$ 335,641	$ (302,455)	$ 1,325,139	$ (29,227)