Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Consolidated Balance Sheets (Parenthetical) [Abstract]
Securities held to maturity fair values	$ 61,512	$ 53,312	$ 54,300
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	63,500	65,000	65,000
Preferred stock, shares outstanding (in shares)	63,500	65,000	65,000
common stock, shares authorized (in shares)	40,000,000	40,000,000	40,000,000
Common stock, shares issued (in shares)	16,884,617	16,801,426	16,785,750
Common stock, outstanding (in shares)	16,884,617	16,801,426	16,785,750