Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2018	$ 176,773	$ 7,834	$ 11,658	$ 116,897	$ 48,274	$ (6,806)	$ (1,084)
Increase (Decrease) in Stockholders' Equity
Net income	3,192				3,192
Other comprehensive income (loss)	917					917
Cash dividends paid	(408)				(408)
Dividends on preferred stock	(121)				(121)
Stock based compensation	425			425
Common stock options exercised	94		8	86
Ending balance at Mar. 31, 2019	180,872	7,834	11,666	117,408	50,937	(5,889)	(1,084)
Beginning balance at Dec. 31, 2018	176,773	7,834	11,658	116,897	48,274	(6,806)	(1,084)
Increase (Decrease) in Stockholders' Equity
Net income	22,896
Other comprehensive income (loss)	4,664
Common stock issued related to acquisition	0
Ending balance at Sep. 30, 2019	206,240	7,334	11,865	120,918	69,349	(2,142)	(1,084)
Beginning balance at Mar. 31, 2019	180,872	7,834	11,666	117,408	50,937	(5,889)	(1,084)
Increase (Decrease) in Stockholders' Equity
Net income	15,377				15,377
Other comprehensive income (loss)	3,375					3,375
Cash dividends paid	(464)				(464)
Dividends on preferred stock	(122)				(122)
Stock based compensation	401			401
Common stock options exercised	237		26	211
Restricted stock units vested	0		10	(10)
Common stock issued from subordinated debt conversion, net of costs	1,000		62	938
Ending balance at Jun. 30, 2019	200,676	7,834	11,764	118,948	65,728	(2,514)	(1,084)
Increase (Decrease) in Stockholders' Equity
Net income	4,327				4,327
Other comprehensive income (loss)	372					372
Cash dividends paid	(585)				(585)
Dividends on preferred stock	(121)				(121)
Stock based compensation	493			493
Common stock options exercised	545		46	499
Common stock issued related to acquisition	1,033		55	978
Preferred stock redemption	(500)	(500)
Ending balance at Sep. 30, 2019	206,240	7,334	11,865	120,918	69,349	(2,142)	(1,084)
Beginning balance at Dec. 31, 2019	211,936	7,334	11,995	122,516	72,496	(1,321)	(1,084)
Increase (Decrease) in Stockholders' Equity
Net income	1,048				1,048
Other comprehensive income (loss)	(917)					(917)
Cash dividends paid	(1,076)				(1,076)
Dividends on preferred stock	(114)				(114)
Stock based compensation	498			498
Common stock options exercised	38		3	35
Common stock repurchased	(260)						(260)
Ending balance at Mar. 31, 2020	211,153	7,334	11,998	123,049	72,354	(2,238)	(1,344)
Beginning balance at Dec. 31, 2019	211,936	7,334	11,995	122,516	72,496	(1,321)	(1,084)
Increase (Decrease) in Stockholders' Equity
Net income	25,573
Other comprehensive income (loss)	69
Common stock issued related to acquisition	240
Ending balance at Sep. 30, 2020	234,116	7,334	12,069	124,474	94,496	(1,252)	(3,005)
Beginning balance at Mar. 31, 2020	211,153	7,334	11,998	123,049	72,354	(2,238)	(1,344)
Increase (Decrease) in Stockholders' Equity
Net income	18,034				18,034
Other comprehensive income (loss)	45					45
Cash dividends paid	(1,076)				(1,076)
Dividends on preferred stock	(115)				(115)
Stock based compensation	627			627
Restricted stock units vested	(7)		49	(49)			(7)
Common stock issued related to acquisition	240		19	221
Common stock repurchased	(401)						(401)
Ending balance at Jun. 30, 2020	228,500	7,334	12,066	123,848	89,197	(2,193)	(1,752)
Increase (Decrease) in Stockholders' Equity
Net income	6,491				6,491
Other comprehensive income (loss)	941					941
Cash dividends paid	(1,076)				(1,076)
Dividends on preferred stock	(116)				(116)
Stock based compensation	592			592
Common stock options exercised	37		3	34
Common stock repurchased	(1,253)						(1,253)
Ending balance at Sep. 30, 2020	$ 234,116	$ 7,334	$ 12,069	$ 124,474	$ 94,496	$ (1,252)	$ (3,005)