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)	188,428
Cumulative translation adjustment	274
Ending Balance at Sep. 30, 2023	1,190,978	123	346,947	(327,091)	1,208,607	(37,608)
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)
Net Income (Loss)	54,941				54,941
Cumulative translation adjustment	(9,687)					(9,687)
Unrealized net gain (loss) on securities available-for-sale, net of tax	(18)					(18)
Stock-based compensation	7,481		7,481
Withholding tax payments on full value awards vesting and stock option exercises	(216)		(216)
Reissuance of treasury stock	539		(185)	724
Cash dividend on common stock	(27,154)				(27,154)
Ending Balance at Sep. 30, 2023	1,190,978	123	346,947	(327,091)	1,208,607	(37,608)
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)	209,042
Cumulative translation adjustment	13,936
Ending Balance at Sep. 30, 2024	1,386,254	123	344,138	(316,524)	1,368,661	(10,144)
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)
Net Income (Loss)	71,489				71,489
Cumulative translation adjustment	18,740					18,740
Unrealized net gain (loss) on securities available-for-sale, net of tax	343					343
Stock-based compensation	8,294		8,294
Exercise of stock options	444		444
Withholding tax payments on full value awards vesting and stock option exercises	(164)		(164)
Reissuance of treasury stock	886		(77)	963
Repurchases of common stock	(15,032)			(15,032)
Cash dividend on common stock	(27,967)				(27,967)
Ending Balance at Sep. 30, 2024	$ 1,386,254	$ 123	$ 344,138	$ (316,524)	$ 1,368,661	$ (10,144)