CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Balance (in shares) at Dec. 31, 2022		10,928
Balance at Dec. 31, 2022	$ 155,044	$ 11	$ 21,555	$ 24	$ 139,852	$ (6,398)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39,968				39,968
Share-based compensation (in shares)		69
Share-based compensation	$ 606		606
Options exercised by directors (in shares)	4	4
Options exercised by directors	$ 105		105
Net shares repurchased for employee taxes (in shares)		(30)
Net shares repurchased for employee taxes	(3,236)		(3,236)
Treasury stock from stock repurchases	(3,602)					(3,602)
Treasury stock retired from stock repurchases (in shares)		(84)
Treasury stock retired from stock repurchases	0				(10,000)	10,000
Other comprehensive income	9			9
Cash dividends declared to stockholders	(17,994)				(17,994)
Balance (in shares) at Mar. 31, 2023		10,887
Balance at Mar. 31, 2023	$ 170,900	$ 11	19,030	33	151,826	0
Balance (in shares) at Dec. 31, 2023	10,896	10,896
Balance at Dec. 31, 2023	$ 201,481	$ 11	26,573	248	174,649	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,316				8,316
Share-based compensation (in shares)		59
Share-based compensation	$ 2,171		2,171
Options exercised by directors (in shares)	1	1
Options exercised by directors	$ 36		36
Net shares repurchased for employee taxes (in shares)		(19)
Net shares repurchased for employee taxes	(817)		(817)
Other comprehensive income	$ (226)			(226)
Balance (in shares) at Mar. 31, 2024	10,937	10,937
Balance at Mar. 31, 2024	$ 210,961	$ 11	$ 27,963	$ 22	$ 182,965	$ 0