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	4,151	0	4,151
Other comprehensive loss	0	0	0	(702)	(702)
Equity based compensation	16	130	0	0	146
Cash dividends declared	0	0	(1,809)	0	(1,809)
Balance at Mar. 31, 2013	7,863	57,341	92,933	6,895	165,032
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	3,450	0	3,450
Other comprehensive loss	0	0	0	1,151	1,151
Stock options exercised	0	0	0	0	0
Equity based compensation	14	152	0	0	166
Cash dividends declared	0	0	(1,819)	0	(1,819)
Balance at Mar. 31, 2014	$ 7,905	$ 58,202	$ 100,721	$ 3,671	$ 170,499