Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2016	$ 201,380	$ 8,578	$ 75,076	$ 119,600	$ (1,874)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,249			15,249
Other comprehensive income (loss)	(657)				(657)
Reclass stranded tax effects from tax rate change	(545)			545	(545)
Stock options exercised	113	5	108
Vesting of restricted stock		8	(8)
Equity-based compensation	1,016	13	1,003
Cash dividends paid	(8,384)			(8,384)
Ending Balance at Dec. 31, 2017	208,717	8,604	76,179	127,010	(3,076)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification for ASU 2016-01 adoption					(650)
Net income	22,579			22,579
Other comprehensive income (loss)	(2,109)				(2,109)
Stock options exercised	861	35	826
Vesting of restricted stock		13	(13)
Equity-based compensation	1,196	16	1,180
Cash dividends paid	(8,702)			(8,702)
Ending Balance at Dec. 31, 2018	222,542	8,668	78,172	141,537	(5,835)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,906			20,906
Other comprehensive income (loss)	5,352				5,352
Issuance of common stock	82,470	2,362	80,108
Issuance of replacement options/restricted stock	870		870
Stock repurchased	(3,146)	(86)	(3,060)
Stock options exercised	688	37	651
Vesting of restricted stock		22	(22)
Equity-based compensation	1,541	16	1,525
Cash dividends paid	(10,965)			(10,965)
Ending Balance at Dec. 31, 2019	$ 320,258	$ 11,019	$ 158,244	$ 151,478	$ (483)