Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
Beginning balance, value at Dec. 31, 2020	$ 655,643	$ 618	$ 357,908	$ 719,619		$ (422,502)
Beginning balance, shares at Dec. 31, 2020		61,861				4,122
Vesting of restricted stock		$ 5	(5)
Vesting of restricted stock, shares		437
Stock-based compensation	107,691		107,691
Repurchases of common stock	(65,580)					$ (65,580)
Repurchases of common stock, shares						164
Net income	195,960			195,960
Ending balance, value at Dec. 31, 2021	893,714	$ 623	465,594	915,579		$ (488,082)
Ending balance, shares at Dec. 31, 2021		62,298				4,286
Vesting of restricted stock		$ 2	(2)
Vesting of restricted stock, shares		220
Stock-based compensation	111,030		111,030
Repurchases of common stock	(99,823)					$ (99,823)
Repurchases of common stock, shares						365
Net income	281,389			281,389
Other comprehensive earnings (loss), net of tax	(3,703)				$ (3,703)
Ending balance, value at Dec. 31, 2022	1,182,607	$ 625	576,622	1,196,968	(3,703)	$ (587,905)
Ending balance, shares at Dec. 31, 2022		62,518				4,651
Vesting of restricted stock	1	$ 2	(1)
Vesting of restricted stock, shares		157
Stock-based compensation	147,872		147,872
Dividends declared	(67,775)			(67,775)
Repurchases of common stock	(303,121)					$ (303,121)
Repurchases of common stock, shares						1,496
Net income	340,788			340,788
Other comprehensive earnings (loss), net of tax	2,664				2,664
Ending balance, value at Dec. 31, 2023	$ 1,303,036	$ 627	$ 724,493	$ 1,469,981	$ (1,039)	$ (891,026)
Ending balance, shares at Dec. 31, 2023		62,675				6,147