Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowance, loans	$ 22,024	$ 21,257
Preferred stock, no par value
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	23,184	23,184
Common stock, no par value
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	8,455,881	8,455,881
Treasury stock, shares	747,964	747,964