CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in- Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 726,781	$ 45,000	$ 280	$ 489,151	$ (103,052)	$ 289,583	$ 5,819
Beginning balance (in shares) at Dec. 31, 2020			24,868,218		3,083,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)			4,613
Issuance of restricted stock awards	0		$ 0	0
Stock option exercises, net (in shares)			10,205
Stock option exercises, net	$ 191			191
Issuance of common stock pursuant to the employee stock purchase plan (in shares)	0
Stock based compensation	$ 1,350			1,350
Forfeiture of restricted stock awards (in shares)			(107)		(107)
Forfeiture of restricted stock awards	0			7	$ (7)
Dividends declared	(801)					(801)
Net income	33,923					33,923
Other comprehensive income (loss)	2,560						2,560
Ending balance at Mar. 31, 2021	764,004	45,000	$ 280	490,699	$ (103,059)	322,705	8,379
Ending balance (in shares) at Mar. 31, 2021			24,882,929		3,083,610
Beginning balance at Dec. 31, 2021	858,864	45,000	$ 283	510,939	$ (104,743)	399,351	8,034
Beginning balance (in shares) at Dec. 31, 2021			25,158,879		3,102,801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)			5,502
Issuance of restricted stock awards	0		$ 0	0
Stock option exercises, net (in shares)			2,021
Stock option exercises, net	$ (74)		$ 0	(74)
Issuance of common stock pursuant to the employee stock purchase plan (in shares)	10,585		10,585
Issuance of common stock pursuant to the employee stock purchase plan			$ 688	688
Stock based compensation	$ 4,952			4,952
Forfeiture of restricted stock awards (in shares)			(487)		(487)
Forfeiture of restricted stock awards	0			46	$ (46)
Purchase of treasury stock (in shares)			(14,810)		(14,810)
Purchase of treasury stock	(1,316)				$ (1,316)
Dividends declared	(801)					(801)
Net income	24,329					24,329
Other comprehensive income (loss)	23						23
Ending balance at Mar. 31, 2022	$ 886,665	$ 45,000	$ 283	$ 516,551	$ (106,105)	$ 422,879	$ 8,057
Ending balance (in shares) at Mar. 31, 2022			25,161,690		3,118,098