Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total		Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2013	$ 167,551		$ 7,891	$ 58,050	$ 99,090	$ 2,520
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,683				6,683
Other comprehensive income (loss)	2,627					2,627
Stock repurchased and retired	(1,500)		(70)	(1,430)
Equity based compensation	343		19	324
Cash dividends declared ($0.46 per share)	(3,621)				(3,621)
Ending Balance at Jun. 30, 2014	172,083		7,840	56,944	102,152	5,147
Beginning Balance at Dec. 31, 2014	173,780	[1]	7,872	57,650	104,594	3,664
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,395				6,395
Other comprehensive income (loss)	(1,262)					(1,262)
Issuance of common stock	20,483		826	19,657
Stock repurchased and retired	(1,175)		(52)	(1,123)
Stock options exercised	265		15	250
Equity based compensation	402		10	392
Cash dividends declared ($0.46 per share)	(4,005)				(4,005)
Ending Balance at Jun. 30, 2015	$ 194,883		$ 8,671	$ 76,826	$ 106,984	$ 2,402

[1] Derived from audited consolidated financial statements.