CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Available-for-sale investment securities, Amortized cost	$ 314,497	$ 321,405
Loans, allowance for credit losses	$ 10,285	$ 11,396
Preferred stock, liquidation preference	$ 1,000	$ 1,000
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	7,000	7,000
Preferred stock, outstanding	7,000	7,000
Preferred stock, par value	$ 0	$ 0
Common stock, authorized	80,000,000	80,000,000
Common stock, issued	9,591,316	9,547,816
Common stock, outstanding	9,591,316	9,547,816
Common stock, par value	$ 0	$ 0