Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 14,620	$ 15,461	$ 12,479
Other comprehensive income, net of tax:
Change in net unrealized gain on securities available for sale, net of taxes of $1,394, $300 and $2,355	2,590	558	4,373
Reclassification adjustments for net securities gains included in net income, net of taxes of $(348), $(729) and $(427)	(646)	(1,354)	(792)
Change in net unrealized (loss) gain on interest rate swaps, net of taxes of $(66), $(197) and $15	(123)	(366)	28
Pension liability adjustment, net of taxes of $(213), $93 and $246	(396)	172	456
Other comprehensive income (loss)	1,425	(990)	4,065
Comprehensive income	$ 16,045	$ 14,471	$ 16,544