Unaudited 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, 2022	$ 1,182,607	$ 625	$ 576,622	$ 1,196,968	$ (3,703)	$ (587,905)
Beginning balance, shares at Dec. 31, 2022		62,518				4,651
Vesting of restricted stock, shares		7
Stock-based compensation	32,344		32,344
Repurchases of common stock	(626)					$ (626)
Repurchases of common stock, shares						2
Net income	119,296			119,296
Other comprehensive earnings (loss), net of tax	850				850
Ending balance, value at Mar. 31, 2023	1,334,471	$ 625	608,966	1,316,264	(2,853)	$ (588,531)
Ending balance, shares at Mar. 31, 2023		62,525				4,653
Beginning balance, value at Dec. 31, 2022	1,182,607	$ 625	576,622	1,196,968	(3,703)	$ (587,905)
Beginning balance, shares at Dec. 31, 2022		62,518				4,651
Net income	183,812
Ending balance, value at Jun. 30, 2023	1,406,685	$ 626	649,965	1,358,059	(2,993)	$ (598,972)
Ending balance, shares at Jun. 30, 2023		62,640				4,691
Beginning balance, value at Mar. 31, 2023	1,334,471	$ 625	608,966	1,316,264	(2,853)	$ (588,531)
Beginning balance, shares at Mar. 31, 2023		62,525				4,653
Vesting of restricted stock		$ 1	(1)
Vesting of restricted stock, shares		115
Stock-based compensation	41,000		41,000
Repurchases of common stock	(10,441)					$ (10,441)
Repurchases of common stock, shares						38
Dividends declared	(22,721)			(22,721)
Net income	64,516			64,516
Other comprehensive earnings (loss), net of tax	(140)				(140)
Ending balance, value at Jun. 30, 2023	1,406,685	$ 626	649,965	1,358,059	(2,993)	$ (598,972)
Ending balance, shares at Jun. 30, 2023		62,640				4,691
Beginning balance, value at Dec. 31, 2023	1,303,036	$ 627	724,493	1,469,981	(1,039)	$ (891,026)
Beginning balance, shares at Dec. 31, 2023		62,675				6,147
Vesting of restricted stock, shares		44
Stock-based compensation	(89,675)		(89,675)
Repurchases of common stock	(3,052)					$ (3,052)
Repurchases of common stock, shares						15
Dividends declared	(19,977)			(19,977)
Net income	247,187			247,187
Other comprehensive earnings (loss), net of tax	544				544
Ending balance, value at Mar. 31, 2024	1,438,063	$ 627	634,818	1,697,191	(495)	$ (894,078)
Ending balance, shares at Mar. 31, 2024		62,719				6,162
Beginning balance, value at Dec. 31, 2023	1,303,036	$ 627	724,493	1,469,981	(1,039)	$ (891,026)
Beginning balance, shares at Dec. 31, 2023		62,675				6,147
Net income	315,157
Ending balance, value at Jun. 30, 2024	1,426,531	$ 629	667,197	1,743,608	(305)	$ (984,598)
Ending balance, shares at Jun. 30, 2024		62,887				6,736
Beginning balance, value at Mar. 31, 2024	1,438,063	$ 627	634,818	1,697,191	(495)	$ (894,078)
Beginning balance, shares at Mar. 31, 2024		62,719				6,162
Vesting of restricted stock		$ 2	(2)
Vesting of restricted stock, shares		168
Stock-based compensation	32,381		32,381
Repurchases of common stock	(90,520)					$ (90,520)
Repurchases of common stock, shares						574
Dividends declared	(21,553)			(21,553)
Net income	67,970			67,970
Other comprehensive earnings (loss), net of tax	190				190
Ending balance, value at Jun. 30, 2024	$ 1,426,531	$ 629	$ 667,197	$ 1,743,608	$ (305)	$ (984,598)
Ending balance, shares at Jun. 30, 2024		62,887				6,736