Consolidated Statements Of Comprehensive Income (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 3,010	$ 2,870	$ 8,652	$ 8,633
Other comprehensive income:
Net unrealized appreciation on securities available for sale, net of tax	4,068	1,438	7,082	5,088
Less reclassification adjustment for net gains related to securities available for sale included in net income, net of tax	(657)	(408)	(1,528)	(1,304)
Add other-than-temporary impairment adjustment net of tax	490	140	1,252	496
Less non-credit portion of other-than-temporary impairment losses, net of tax	(113)		(113)
Net unrealized depreciation and other amounts for interest rate derivatives net of tax		(112)		(372)
Amortization of actuarial gain for supplemental executive retirement plan net of related tax	1	1	2	4
Total other comprehensive income	3,789	1,059	6,695	3,912
Total comprehensive income	$ 6,799	$ 3,929	$ 15,347	$ 12,545