Subsequent Events (Details) (USD $)						0 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Sep. 30, 2012 Subsequent events FAB	Oct. 15, 2012 Subsequent events FAB Merger agreement	Oct. 15, 2012 Subsequent events FAB Shareholders Merger agreement	Oct. 15, 2012 Subsequent events FAB Option holders and warrant holders Merger agreement
Subsequent Events
Total assets	$ 1,089,336,000	$ 961,128,000	$ 928,502,000	$ 356,200,000
Total deposits	895,870,000	828,877,000	797,378,000	305,500,000
Consideration for merger transaction					53,700,000	50,200,000	3,500,000
Cash consideration						37,600,000
Number of shares of common stock to be issued						1,279,228
Value of shares of common stock to be issued						12,500,000
Period prior to announcement of the transaction for which average closing price considered to calculate value of shares to be issued						5 days
Amount of transaction-related expenses, if exceeded may cause reduction in cash consideration payable						$ 3,900,000