CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other comprehensive income net of tax:
Unrealized holding gains losses arising during the period, taxes	$ 1,511	$ 2,826	$ 646
Reclassification adjustment for investment securities, taxes	151	156	294
Unrealized gain on interest rate swaps, tax	50	213	106
Change in benefit obligation and plan assets for defined benefit pension plan, taxes	$ 0	$ 80	$ 80
Cash dividends:
Cash dividends, Common stock (in dollars per share)	$ 0.2	$ 0.20	$ 0.35
Exercise of stock options (in shares)	0	0	12,500
Restricted stock vesting (in shares)	12,932	7,922	3,650
Repurchase of restricted stock (in shares)	2,736