Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income	$ 6,401	$ 5,425	$ 17,973	$ 15,843
Net change in unrealized (losses) gains on investment securities available for sale:
Net unrealized gains (losses) arising during the period, net of tax expense (benefit) of $26, $657, ($1,742) and $1,416, respectively	50	1,221	(3,236)	2,630
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $0, $146, $1 and $396, respectively		(270)	(1)	(736)
Unrealized investment gains (losses), net of tax expense (benefit) of $26, $166, ($1,743) and $1,020, respectively	50	951	(3,237)	1,894
Net change in fair value of derivative used for cash flow hedge:
Change in fair value of hedging instruments, net of tax expense of $0, $0, $324 and $0, respectively			601
Net change in unfunded pension liability:
Change in unfunded pension liability related to unrealized loss, prior service cost and transition obligation, net of tax expense of $133, $146, $399 and $438, respectively	246	272	741	816
Change in unfunded pension liability related to curtailment, net of tax expense of $0, $0, $627 and $0, respectively			1,164
Total change in unfunded pension liability, net of tax expense of $133, $146, $1,026 and $438, respectively	246	272	1,905	816
Total other comprehensive income (loss)	296	1,223	(731)	2,710
Total comprehensive income	$ 6,697	$ 6,648	$ 17,242	$ 18,553