Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other comprehensive income net of tax:
Unrealized holding losses arising during the period, taxes	$ 2,824	$ 646	$ 262
Reclassification adjustment, taxes	156	294	704
Unrealized losses on securities for which an other-than-temporary impairment	9	375	364
Unrealized gain on interest rate swaps, tax	213	106	0
Change in benefit obligation and plan assets for defined benefit pension plan, taxes	80	80	966
Total Other comprehensive loss, tax	$ 0	$ 753	$ 364
Cash dividends:
Cash dividends, Common stock (in dollars per share)	$ 0.20	$ 0.35	$ 0.48
Issuance of common stock (in shares)	0	0	2,374,976
Exercise of stock options (in shares)	0	12,500	0
Restricted stock vesting (in shares)	(7,922)	3,650	0