Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2016	$ 134,859	$ 437	$ 124,935	$ 11,669	$ (1,165)	$ (1,017)
Increase (Decrease) in Stockholders' Equity
Net income	8,090			8,090
Reclassification of disproportionate tax effects from accumulated other comprehensive income (loss) to retained earnings				(229)	229
Total other comprehensive income (loss), net of taxes	3,781				3,781
Cash dividends	(3,488)			(3,488)
Share-based compensation plans:
Issuance of stock, including compensation expense	1,523	(2)	523			1,002
Ending balance at Dec. 31, 2017	144,765	435	125,458	16,042	2,845	(15)
Increase (Decrease) in Stockholders' Equity
Net income	12,805			12,805
Total other comprehensive income (loss), net of taxes	(5,817)				(5,817)
Cash dividends	(4,375)			(4,375)
Issuance of common shares for acquisition	25,053	55	24,998
Share-based compensation plans:
Issuance of stock, including compensation expense	1,002	1	1,222			(221)
Ending balance at Dec. 31, 2018	173,433	491	151,678	24,472	(2,972)	(236)
Increase (Decrease) in Stockholders' Equity
Net income	16,924			16,924
Total other comprehensive income (loss), net of taxes	2,492				2,492
Cash dividends	(6,150)			(6,150)
Issuance of common shares for acquisition	36,622	92	36,530
Share-based compensation plans:
Issuance of stock, including compensation expense	(72)	1	157			(230)
Ending balance at Dec. 31, 2019	$ 223,249	$ 584	$ 188,365	$ 35,246	$ (480)	$ (466)