Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Comprehensive Income
Net income	$ 13,763	$ 13,093	$ 12,772
Other comprehensive income (loss):
Change in unrealized net gains (losses) on securities available for sale, net of reclassification and deferred income taxes	8,687	(14,732)	(2,996)
Adjustment to pension liability, net of deferred income taxes	(3,348)	1,907	256
Unrealized gain (loss) on cash flow hedge, net of deferred income taxes	(470)	7	(106)
Total other comprehensive income (loss)	4,869	(12,818)	(2,846)
Comprehensive income	$ 18,632	$ 275	$ 9,926