Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 3,368	$ 3,010	$ 9,636	$ 8,652
Other comprehensive income:
Net unrealized appreciation on securities available for sale, net of tax	2,635	4,068	4,573	7,082
Less reclassification adjustment for net gains related to securities available for sale included in net income, net of tax	(394)	(657)	(1,210)	(1,528)
Add other-than-temporary impairment adjustment, net of tax	115	490	665	1,252
Less non-credit portion of other-than-temporary impairment losses, net of tax	(47)	(113)	(149)	(113)
Net amortization of prior service cost and actuarial( gain)/loss for supplemental executive retirement plan	(100)	1	(99)	2
Actuarial gain on supplemental executive retirement plan, net of related tax of $114 and $0, respectively	(222)		(222)
Total other comprehensive income	1,987	3,789	3,558	6,695
Total comprehensive income	$ 5,355	$ 6,799	$ 13,194	$ 15,347