CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period (in shares) at Dec. 31, 2018		6,627,358
Balance in the beginning of period at Dec. 31, 2018	$ 193,703	$ 41,094	$ 1,042	$ 159,073	$ (7,506)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,696			5,696
Stock incentive plan	49		49
Issuance of shares of common stock through exercise of stock options (in shares)		7,200
Issuance of shares of common stock through exercise of stock options	80	$ 80
Issuance of shares of common stock as board compensation (in shares)		2,368
Issuance of shares of common stock as board compensation	97	$ 97
Cash dividend	(1,326)			(1,326)
Other comprehensive income (loss)	3,885				3,885
Balance at the end of period (in shares) at Mar. 31, 2019		6,636,926
Balance at the end of period at Mar. 31, 2019	$ 202,184	$ 41,271	1,091	163,443	(3,621)
Balance at the beginning of period (in shares) at Dec. 31, 2019	7,306,221	7,306,221
Balance in the beginning of period at Dec. 31, 2019	$ 251,898	$ 68,082	1,269	182,571	(24)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,745			6,745
Stock incentive plan	64		64
Issuance of shares of common stock through exercise of stock options (in shares)		14,720
Issuance of shares of common stock through exercise of stock options	8	$ 8
Issuance of shares of common stock as board compensation (in shares)		1,591
Issuance of shares of common stock as board compensation	87	$ 87
Cash dividend	(439)			(439)
Other comprehensive income (loss)	$ 5,812				5,812
Balance at the end of period (in shares) at Mar. 31, 2020	7,322,532	7,322,532
Balance at the end of period at Mar. 31, 2020	$ 264,175	$ 68,177	$ 1,333	$ 188,877	$ 5,788