CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Balance (in shares) at Dec. 31, 2020		11,822,000
Balance at Dec. 31, 2020	$ 157,246	$ 12	$ 7,842	$ 41	$ 154,351	$ (5,000)
Net income	41,063				41,063
Share-based compensation (in shares)		13,000
Share-based compensation	2,198		2,198
Options exercised by executives and directors (in shares)		11,000
Options exercised by executives and directors	$ 481		481
Net shares repurchased for employee taxes (in shares)	(7,000)	(7,000)
Net shares repurchased for taxes	$ (1,807)		(1,807)
Treasury stock from stock repurchases	(7,500)					(7,500)
Other comprehensive income	62			62
Cash dividends declared to stockholders	(16,852)				(16,852)
Balance (in shares) at Mar. 31, 2021		11,839,000
Balance at Mar. 31, 2021	174,891	$ 12	8,714	103	178,562	(12,500)
Balance (in shares) at Dec. 31, 2021		11,594,000
Balance at Dec. 31, 2021	202,474	$ 12	12,018	111	190,333	0
Net income	41,781				41,781
Share-based compensation (in shares)		18,000
Share-based compensation	$ 2,275		2,275
Net shares repurchased for employee taxes (in shares)	(8,000)	(8,000)
Net shares repurchased for taxes	$ (1,459)		(1,459)
Treasury stock from stock repurchases	(10,000)					(10,000)
Treasury stock retire from stock repurchases (in shares)		(51,000)
Treasury stock retired from stock repurchases	0				(10,000)	10,000
Other comprehensive income	16			16
Cash dividends declared to stockholders	(19,063)				(19,063)
Balance (in shares) at Mar. 31, 2022		11,553,000
Balance at Mar. 31, 2022	$ 216,024	$ 12	$ 12,834	$ 127	$ 203,051	$ 0