CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Total
BALANCE at Dec. 31, 2021	$ 411	$ (150,580)	$ 327,061	$ 628,774	$ 805,666
BALANCE (in shares) at Dec. 31, 2021	41,123,365
BALANCE (in shares) at Dec. 31, 2021		(5,032,311)
Increase (Decrease) in Stockholders' Equity
Net income				245,947	245,947
Issuance of Stock:
Issuance of shares for options exercised		$ 1,174	(88)		1,086
Issuance of shares for options exercised (in shares)		34,187
Issuance of restricted stock & performance stock		$ 3,657	(113)		3,544
Issuance of restricted stock & performance stock (in shares)		113,955
Shares received in lieu of tax withholding on vested stock		$ (3,247)			(3,247)
Shares received in lieu of tax withholding on vested stock (in shares)		(36,006)
Stock-based compensation			5,220		5,220
Dividends				(20,077)	(20,077)
Share repurchase		$ (38,216)			(38,216)
Share repurchase (in shares)		(442,049)
BALANCE at Dec. 31, 2022	$ 411	$ (187,212)	332,080	854,644	999,923
BALANCE (in shares) at Dec. 31, 2022	41,123,365
BALANCE (in shares) at Dec. 31, 2022		(5,362,224)
Increase (Decrease) in Stockholders' Equity
Net income				323,398	323,398
Issuance of Stock:
Issuance of shares for options exercised		$ 36	(18)		18
Issuance of shares for options exercised (in shares)		1,000
Issuance of restricted stock & performance stock		$ 3,398	1,117		4,515
Issuance of restricted stock & performance stock (in shares)		94,729
Shares received in lieu of tax withholding on vested stock		$ (4,725)			(4,725)
Shares received in lieu of tax withholding on vested stock (in shares)		(32,652)
Stock-based compensation			6,383		6,383
Dividends				(30,379)	(30,379)
Share repurchase		$ (21,304)			(21,304)
Share repurchase (in shares)		(139,478)
BALANCE at Dec. 31, 2023	$ 411	$ (209,807)	339,562	1,147,663	$ 1,277,829
BALANCE (in shares) at Dec. 31, 2023	41,123,365				41,123,365
BALANCE (in shares) at Dec. 31, 2023		(5,438,625)			5,438,625
Increase (Decrease) in Stockholders' Equity
Net income				522,433	$ 522,433
Issuance of Stock:
Issuance of shares for options exercised		$ 248	(64)		184
Issuance of shares for options exercised (in shares)		5,369
Issuance of restricted stock & performance stock		$ 2,982	2,371		5,353
Issuance of restricted stock & performance stock (in shares)		74,129
Shares received in lieu of tax withholding on vested stock		$ (8,915)			(8,915)
Shares received in lieu of tax withholding on vested stock (in shares)		(26,168)
Stock-based compensation			8,865		8,865
Dividends				(42,766)	(42,766)
Share repurchase		$ (58,307)			(58,307)
Share repurchase (in shares)		(177,158)
BALANCE at Dec. 31, 2024	$ 411	$ (273,799)	$ 350,734	$ 1,627,330	$ 1,704,676
BALANCE (in shares) at Dec. 31, 2024	41,123,365				41,123,365
BALANCE (in shares) at Dec. 31, 2024		(5,562,453)			5,562,453