CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income	Total
Balances at Dec. 31, 2022	$ 298	$ 339,582	$ 1,088,693	$ (284,275)	$ 7,103	$ 1,151,401
Balances (in shares) at Dec. 31, 2022	29,759,000
Balances, Treasury stock (in shares) at Dec. 31, 2022				5,529,000
Increase (Decrease) in Stockholders' Equity
Net income			146,643			146,643
Other comprehensive loss, net of tax					(1,517)	(1,517)
Issuance of common stock under share-based compensation plans	$ 2	(2)
Issuance of common stock under share-based compensation plans (in shares)	259,000
Shares withheld for employee tax remittance on share-based compensation		(10,056)				(10,056)
Share-based compensation expense		8,844				8,844
Purchase of treasury stock				$ (65,886)		(65,886)
Purchase of treasury stock (in shares)				689,000
Dividends declared on common stock			(8,696)			(8,696)
Balances at Sep. 30, 2023	$ 300	338,368	1,226,640	$ (350,161)	5,586	1,220,733
Balances (in shares) at Sep. 30, 2023	30,018,000
Balances, Treasury stock (in shares) at Sep. 30, 2023				6,218,000
Balances at Jun. 30, 2023	$ 300	335,397	1,194,610	$ (325,515)	6,569	1,211,361
Balances (in shares) at Jun. 30, 2023	30,008,000
Balances, Treasury stock (in shares) at Jun. 30, 2023				5,983,000
Increase (Decrease) in Stockholders' Equity
Net income			34,917			34,917
Other comprehensive loss, net of tax					(983)	(983)
Issuance of common stock under share-based compensation plans (in shares)	10,000
Shares withheld for employee tax remittance on share-based compensation		(34)				(34)
Share-based compensation expense		3,005				3,005
Purchase of treasury stock				$ (24,646)		(24,646)
Purchase of treasury stock (in shares)				235,000
Dividends declared on common stock			(2,887)			(2,887)
Balances at Sep. 30, 2023	$ 300	338,368	1,226,640	$ (350,161)	5,586	1,220,733
Balances (in shares) at Sep. 30, 2023	30,018,000
Balances, Treasury stock (in shares) at Sep. 30, 2023				6,218,000
Balances at Dec. 31, 2023	$ 300	340,961	1,272,584	$ (375,806)	4,324	$ 1,242,363
Balances (in shares) at Dec. 31, 2023	30,024,000
Balances, Treasury stock (in shares) at Dec. 31, 2023				6,460,000		6,460,137
Increase (Decrease) in Stockholders' Equity
Net income			144,926			$ 144,926
Other comprehensive loss, net of tax					(1,978)	(1,978)
Issuance of common stock under share-based compensation plans	$ 4	(4)
Issuance of common stock under share-based compensation plans (in shares)	377,000
Shares withheld for employee tax remittance on share-based compensation		(22,662)				(22,662)
Share-based compensation expense		9,040				9,040
Purchase of treasury stock				$ (56,108)		(56,108)
Purchase of treasury stock (in shares)				478,000
Dividends declared on common stock			(8,485)			(8,485)
Balances at Sep. 30, 2024	$ 304	327,335	1,409,025	$ (431,914)	2,346	$ 1,307,096
Balances (in shares) at Sep. 30, 2024	30,401,000
Balances, Treasury stock (in shares) at Sep. 30, 2024				6,938,000		6,938,452
Balances at Jun. 30, 2024	$ 304	324,645	1,311,549	$ (407,433)	2,473	$ 1,231,538
Balances (in shares) at Jun. 30, 2024	30,400,000
Balances, Treasury stock (in shares) at Jun. 30, 2024				6,712,000
Increase (Decrease) in Stockholders' Equity
Net income			100,314			100,314
Other comprehensive loss, net of tax					(127)	(127)
Issuance of common stock under share-based compensation plans (in shares)	1,000
Shares withheld for employee tax remittance on share-based compensation		(28)				(28)
Share-based compensation expense		2,718				2,718
Purchase of treasury stock				$ (24,481)		(24,481)
Purchase of treasury stock (in shares)				226,000
Dividends declared on common stock			(2,838)			(2,838)
Balances at Sep. 30, 2024	$ 304	$ 327,335	$ 1,409,025	$ (431,914)	$ 2,346	$ 1,307,096
Balances (in shares) at Sep. 30, 2024	30,401,000
Balances, Treasury stock (in shares) at Sep. 30, 2024				6,938,000		6,938,452