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, 2015	$ 197,835		$ 8,605	$ 75,375	$ 111,565	$ 2,290
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,128				4,128
Other comprehensive income	1,206					1,206
Stock repurchased	(964)		(39)	(925)
Stock options exercised	59		2	57
Vesting of restricted stock			3	(3)
Equity based compensation	244		4	240
Cash dividends paid	(2,065)				(2,065)
Ending Balance at Mar. 31, 2016	200,443		8,575	74,744	113,628	3,496
Beginning Balance at Dec. 31, 2016	201,380	[1]	8,578	75,076	119,600	(1,874)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,063				4,063
Other comprehensive income	489					489
Stock options exercised	73		3	70
Vesting of restricted stock			7	(7)
Equity based compensation	309		3	306
Cash dividends paid	(2,073)				(2,073)
Ending Balance at Mar. 31, 2017	$ 204,241		$ 8,591	$ 75,445	$ 121,590	$ (1,385)

[1] Derived from audited consolidated financial statements.