Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2012	$ 7,847	$ 57,211	$ 90,591	$ 7,597	$ 163,246
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	8,361	0	8,361
Other comprehensive loss	0	0	0	(5,447)	(5,447)
Stock options exercised	6	96	0	0	102
Equity based compensation	19	274	0	0	293
Cash dividends declared	0	0	(3,619)	0	(3,619)
Balance at Jun. 30, 2013	7,872	57,581	95,333	2,150	162,936
Balance at Dec. 31, 2013	7,891	58,050	99,090	2,520	167,551
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	6,683	0	6,683
Other comprehensive loss	0	0	0	2,627	2,627
Stock repurchased and retired	(70)	(1,430)	0	0	(1,500)
Stock options exercised	0	0	0	0	0
Equity based compensation	19	324	0	0	343
Cash dividends declared	0	0	(3,621)	0	(3,621)
Balance at Jun. 30, 2014	$ 7,840	$ 56,944	$ 102,152	$ 5,147	$ 172,083