Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Capital Stock, Common	Additional Paid-in Capital	Retained Earnings	Treasury Stock, Common
Balance at Dec. 31, 2020	$ 724,334	$ 907	$ 4,330	$ 890,970	$ (171,873)
Net income	79,277	0	0	79,277	0
Dividends on common stock	(45,872)	0	0	(45,872)	0
Repurchases of common stock	(31,540)	0	0	0	(31,540)
Stock-based compensation, net of tax	903	0	(189)	0	1,092
Balance at Dec. 31, 2021	727,102	907	4,141	924,375	(202,321)
Net income	133,584	0	0	133,584	0
Dividends on common stock	(6,318)	0	0	(6,318)	0
Stock-based compensation, net of tax	1,109	0	24	0	1,085
Balance at Dec. 31, 2022	855,477	907	4,165	1,051,641	(201,236)
Net income	14,775	0	0	14,775	0
Dividends on common stock	(6,322)	0	0	(6,322)	0
Stock-based compensation, net of tax	1,330	0	362	0	968
Balance at Dec. 31, 2023	$ 865,260	$ 907	$ 4,527	$ 1,060,094	$ (200,268)