Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands	Capital Stock [Member]	Surplus [Member]	Undivided Profits [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2012	$ 98,912	$ 174,899	$ 132,378	$ 1,558	$ (48,949)	$ 358,798
Net Income	0	0	9,168	0	0	9,168
Other comprehensive income (loss), net of tax	0	0	0	(1,727)	0	(1,727)
Cash dividend declared	0	0	(6,173)	0	0	(6,173)
Sale of treasury stock	0	(601)	0	0	1,336	735
Stock based compensation expense	0	88	0	0	0	88
Balance at Mar. 31, 2013	98,912	174,386	135,373	(169)	(47,613)	360,889
Balance at Dec. 31, 2013	98,927	173,144	147,432	(13,803)	(43,887)	361,813
Net Income	0	0	11,011	0	0	11,011
Other comprehensive income (loss), net of tax	0	0	0	4,351	0	4,351
Cash dividend declared	0	0	(6,206)	0	0	(6,206)
Sale of treasury stock	0	(267)	0	0	990	723
Stock based compensation expense	0	87	0	0	0	87
Balance at Mar. 31, 2014	$ 98,927	$ 172,964	$ 152,237	$ (9,452)	$ (42,897)	$ 371,779