Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated other comprehensive income/(loss), net
Balance, beginning, shares, outstanding at Dec. 31, 2018		11,708,218
Balance, beginning at Dec. 31, 2018	$ 255,297	$ 117	$ 91,281	$ 165,183	$ (1,284)
Increase (Decrease) in Stockholders' Equity
Net income	16,459			16,459
Other comprehensive income (loss), net	11,146				11,146
Common stock dividend declared	(3,762)			(3,762)
Common stock issued under dividend reinvestment plan, shares		19,844
Common stock issued under dividend reinvestment plan	592	$ 0	592
Common stock issued, shares, other		1,210
Common stock issued, other	36	$ 0	36
Stock-based compensation, shares		62,176
Stock-based compensation	1,056	$ 1	1,055
Net settlement for employee taxes on restricted stock and options, shares		(6,569)
Net settlement for employee taxes on restricted stock and options	(353)	$ 0	(353)
Stock options exercised, net, shares		21,129
Stock options exercised, net	156	$ 0	156
Balance, ending, shares, outstanding at Jun. 30, 2019		11,806,008
Balance, ending at Jun. 30, 2019	280,627	$ 118	92,767	177,880	9,862
Balance, beginning, shares, outstanding at Mar. 31, 2019		11,798,114
Balance, beginning at Mar. 31, 2019	266,061	$ 118	92,089	172,004	1,850
Increase (Decrease) in Stockholders' Equity
Net income	7,763			7,763
Other comprehensive income (loss), net	8,012				8,012
Common stock dividend declared	(1,887)			(1,887)
Common stock issued under dividend reinvestment plan, shares		10,503
Common stock issued under dividend reinvestment plan	294	$ 0	294
Common stock issued, shares, other		946
Common stock issued, other	28	$ 0	28
Stock-based compensation, shares		(347)
Stock-based compensation	457	$ 0	457
Net settlement for employee taxes on restricted stock and options, shares		(3,828)
Net settlement for employee taxes on restricted stock and options	(113)	$ 0	(113)
Stock options exercised, net, shares		620
Stock options exercised, net	12	$ 0	12
Balance, ending, shares, outstanding at Jun. 30, 2019		11,806,008
Balance, ending at Jun. 30, 2019	$ 280,627	$ 118	92,767	177,880	9,862
Balance, beginning, shares, outstanding at Dec. 31, 2019	11,825,331	11,825,331
Balance, beginning at Dec. 31, 2019	$ 296,641	$ 118	94,170	191,843	10,510
Increase (Decrease) in Stockholders' Equity
Net income	11,273			11,273
Other comprehensive income (loss), net	11,426				11,426
Common stock dividend declared	(4,151)			(4,151)
Common stock issued under dividend reinvestment plan, shares		24,831
Common stock issued under dividend reinvestment plan	608	$ 0	608
Common stock issued, shares, other		2,226
Common stock issued, other	55	$ 0	55
Stock-based compensation, shares		66,022
Stock-based compensation	1,027	$ 1	1,026
Net settlement for employee taxes on restricted stock and options, shares		(7,962)
Net settlement for employee taxes on restricted stock and options	(224)	$ 0	(224)
Stock options exercised, net, shares		1,040
Stock options exercised, net	$ 21	$ 0	21
Balance, ending, shares, outstanding at Jun. 30, 2020	11,911,488	11,911,488
Balance, ending at Jun. 30, 2020	$ 316,676	$ 119	95,656	198,965	21,936
Balance, beginning, shares, outstanding at Mar. 31, 2020		11,897,322
Balance, beginning at Mar. 31, 2020	304,637	$ 119	94,920	193,791	15,807
Increase (Decrease) in Stockholders' Equity
Net income	7,256			7,256
Other comprehensive income (loss), net	6,129				6,129
Common stock dividend declared	(2,082)			(2,082)
Common stock issued under dividend reinvestment plan, shares		13,781
Common stock issued under dividend reinvestment plan	305	$ 0	305
Common stock issued, shares, other		1,753
Common stock issued, other	48	$ 0	48
Stock-based compensation, shares		(35)
Stock-based compensation	420	$ 0	420
Net settlement for employee taxes on restricted stock and options, shares		(1,633)
Net settlement for employee taxes on restricted stock and options	(42)	$ 0	(42)
Stock options exercised, net, shares		300
Stock options exercised, net	$ 5	$ 0	5
Balance, ending, shares, outstanding at Jun. 30, 2020	11,911,488	11,911,488
Balance, ending at Jun. 30, 2020	$ 316,676	$ 119	$ 95,656	$ 198,965	$ 21,936