Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income
Net income	$ 27,170	$ 25,801	$ 23,604
Unrealized (losses) gains on securities available for sale:
Unrealized (losses) gains arising during the period (net of tax of $(4,234), $(24), and $1,362, respectively)	(7,863)	(45)	2,530
Unrealized gains on hedging instruments:
Unrealized gains arising during the period (net of tax of $8, $0, and $0, respectively)	16
Reclassification adjustment for securities losses realized in income (net of tax of $2, $0, and $0, respectively)	3
Minimum pension liability adjustment (net of tax of $111, $2, and $(111), respectively)	206	4	(207)
Other comprehensive (loss) income	(7,638)	(41)	2,323
Comprehensive income	$ 19,532	$ 25,760	$ 25,927