Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance at Dec. 31, 2018	$ 34,720	$ 119,081		$ 175,463	$ (4,079)	$ (96,104)		$ 229,081
Increase (Decrease) in Stockholders' Equity
Net income				29,919				29,919
Other comprehensive income, net of tax					10,450			10,450
Dividends declared and paid				(896)				(896)
Vesting of restricted stock	103	(389)				286
Stock options exercised	2	7				23		32
Stock warrants exercised		(313)				313
Stock based compensation		1,905						1,905
Purchase of treasury stock						(470)		(470)
Balance at Sep. 30, 2019	34,825	120,291		204,486	6,371	(95,952)		270,021
Balance at Jun. 30, 2019	34,825	119,762		192,612	6,112	(96,047)		257,264
Increase (Decrease) in Stockholders' Equity
Net income				12,173				12,173
Other comprehensive income, net of tax					259			259
Dividends declared and paid				(299)				(299)
Vesting of restricted stock		(135)				135
Stock based compensation		664						664
Purchase of treasury stock						(40)		(40)
Balance at Sep. 30, 2019	34,825	120,291		204,486	6,371	(95,952)		270,021
Balance at Dec. 31, 2019	34,854	120,657		213,723	4,562	(95,932)		277,864
Increase (Decrease) in Stockholders' Equity
Net income				19,778				19,778
Other comprehensive income, net of tax					6,482			6,482
Dividends declared and paid				(893)				(893)
Vesting of restricted stock	103	(534)				431
Stock based compensation		1,623						1,623
Purchase of treasury stock from taxes withheld on stock awards						(423)		(423)
Purchase of treasury stock						(4,380)		(4,380)
Balance at Sep. 30, 2020	34,957	121,746	$ (3,783)	228,825	11,044	(100,304)	$ (3,783)	296,268
Balance at Jun. 30, 2020	34,957	121,437		218,856	6,422	(99,156)		282,516
Increase (Decrease) in Stockholders' Equity
Net income				10,265				10,265
Other comprehensive income, net of tax					4,622			4,622
Dividends declared and paid				(296)				(296)
Stock based compensation		309						309
Purchase of treasury stock						(1,148)		(1,148)
Balance at Sep. 30, 2020	$ 34,957	$ 121,746	$ (3,783)	$ 228,825	$ 11,044	$ (100,304)	$ (3,783)	$ 296,268