Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2020	$ 588,531	$ 1,406	$ 126,087	$ 737,311	$ (276,273)
Beginning Balance, Shares at Dec. 31, 2020		115,799,503			24,777,502
Net income	208,737			208,737
Employee stock plans	1,800		1,800
Employee stock plans, Shares		113,242
Shares withheld for taxes on awards	(8,538)		(8,538)
Shares withheld for taxes on awards, Shares		(78,626)
Stock-based compensation	8,439	$ 1	8,438
Stock-based compensation, Shares		123,132
Repurchases of common stock	(73,935)				$ (73,935)
Repurchases of common stock, Shares		(809,099)			809,099
Ending Balance at Dec. 31, 2021	725,034	$ 1,407	127,787	946,048	$ (350,208)
Ending Balance, Shares at Dec. 31, 2021		115,148,152			25,586,601
Net income	184,626			184,626
Employee stock plans	1,742		1,742
Employee stock plans, Shares		38,320
Shares withheld for taxes on awards	(3,318)	$ 1	(3,319)
Shares withheld for taxes on awards, Shares		(45,834)
Stock-based compensation	5,329	$ 0	5,329
Stock-based compensation, Shares		114,594
Repurchases of common stock	(395,064)				$ (395,064)
Repurchases of common stock, Shares		(6,511,809)			6,511,809
Ending Balance at Dec. 31, 2022	518,349	$ 1,408	131,539	1,130,674	$ (745,272)
Ending Balance, Shares at Dec. 31, 2022		108,743,423			32,098,410
Net income	205,384			205,384
Employee stock plans	1,223		1,223
Employee stock plans, Shares		27,620
Shares withheld for taxes on awards	(2,767)	$ 2	(2,769)
Shares withheld for taxes on awards, Shares		(48,736)
Stock-based compensation	10,164		10,164
Stock-based compensation, Shares		154,126
Repurchases of common stock	(15,682)				$ (15,682)
Repurchases of common stock, Shares		(264,896)			264,896
Ending Balance at Dec. 31, 2023	$ 716,671	$ 1,410	$ 140,157	$ 1,336,058	$ (760,954)
Ending Balance, Shares at Dec. 31, 2023		108,611,537			32,363,306