Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Voting [Member]	Additional Paid-In Capital [Member]	Treasury Stock - Common Stock Voting [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)	258,055				258,055
Cumulative translation adjustment	13,349					13,349
Unrealized net gain (loss) on securities available-for-sale, net of tax	(22)					(22)
Stock-based compensation	29,190		29,190
Exercise of stock options	940		940
Withholding tax payments on Full Value Awards vesting and stock option exercises	(25,839)		(25,839)
Reissuance of treasury stock	993		(242)	1,235
Treasury stock used for acquisition	43,841		(16,225)	66,793	(6,727)
Cash dividend on common stock	(108,637)				(108,637)
Ending Balance at Dec. 31, 2023	1,292,963	123	333,292	(260,298)	1,244,216	(24,370)
Net Income (Loss)	274,181				274,181
Cumulative translation adjustment	(10,094)					(10,094)
Unrealized net gain (loss) on securities available-for-sale, net of tax	(235)					(235)
Stock-based compensation	30,847		30,847
Exercise of stock options	2,988		2,988
Withholding tax payments on Full Value Awards vesting and stock option exercises	(16,194)		(16,194)
Reissuance of treasury stock	1,590		(232)	2,403	(581)
Repurchases of common stock	(75,474)			(75,474)
Cash dividend on common stock	(111,912)				(111,912)
Ending Balance at Dec. 31, 2024	1,388,660	123	350,701	(333,369)	1,405,904	(34,699)
Net Income (Loss)	246,627				246,627
Cumulative translation adjustment	29,829					29,829
Unrealized net gain (loss) on securities available-for-sale, net of tax	509					509
Stock-based compensation	32,668		32,668
Withholding tax payments on Full Value Awards vesting and stock option exercises	(17,155)		(17,155)
Reissuance of treasury stock	1,690		(291)	1,981
Repurchases of common stock	(420,015)		(60,000)	(360,015)
Excise tax on repurchases of common stock	(3,361)			(3,361)
Cash dividend on common stock	(113,785)				(113,785)
Ending Balance at Dec. 31, 2025	$ 1,145,667	$ 123	$ 305,923	$ (694,764)	$ 1,538,746	$ (4,361)