Participation in the Small Business Lending Fund (Narrative Details) (USD $)	3 Months Ended				9 Months Ended		25 Months Ended	55 Months Ended	57 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013	Mar. 31, 2016	Jun. 30, 2018	Sep. 01, 2011
Participation In Small Business Lending Fund Narrative Details
Sale of Series B preferred stock to the Secretary of Treasury										$ 63,500,000
Qualified community banks with assets less than										10,000,000,000
Liquidation value non-cumulative perpetual preferred stock, per share										$ 1,000
Non-cumulative perpetual preferred stock received by Treasury										63,500
Dividend rate range, minimum					4.30%		1.00%	1.00%
Dividend rate range, maximum					5.00%		5.00%	7.00%
Dividend rate expected	1.20%	3.00%
Dividend rate increase									9.00%
Accrued preferred dividend payments			$ 688,000	$ 815,000	$ 2,277,000	$ 2,440,000