Unaudited Consolidated Statements of Shareholders' Equity - USD ($) $ 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, 2021	$ 893,714	$ 623	$ 465,594	$ 915,579		$ (488,082)
Beginning balance, shares at Dec. 31, 2021		62,298,000				4,286,000
Vesting of restricted stock, shares		4
Stock-based compensation	24,713		24,713
Repurchases of common stock	(218)					$ (218)
Repurchases of common stock, shares						1,000
Net income	91,930			91,930
Other comprehensive earnings (loss), net of tax	(1,119)				$ (1,119)
Ending balance, value at Mar. 31, 2022	1,009,020	$ 623	490,307	1,007,509	(1,119)	$ (488,300)
Ending balance, shares at Mar. 31, 2022		62,302,000				4,287,000
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				4,651,000
Vesting of restricted stock, shares		7,000
Stock-based compensation	32,344		32,344
Repurchases of common stock	(626)					$ (626)
Repurchases of common stock, shares						2,000
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		62,525,000				4,653,000