Fair Value Measurements (Details 2) (Significant Unobservable Inputs (Level 3) [Member], USD $) In Thousands, unless otherwise specified		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended
	Mar. 31, 2013 Pooled Trust Preferred Securities [Member]	Sep. 30, 2012 Pooled Trust Preferred Securities [Member] Discounted cash flow methodology [Member] Minimum [Member]	Sep. 30, 2012 Pooled Trust Preferred Securities [Member] Discounted cash flow methodology [Member] Maximum [Member]	Mar. 31, 2013 Pooled Trust Preferred Securities [Member] Discounted cash flow methodology [Member] Weighted Average [Member]	Mar. 31, 2013 PRIVATIVE MORTGAGE-BACKED SECURITIES [Member]	Sep. 30, 2012 PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] Multi-dimensional spread tables [Member] Minimum [Member]	Sep. 30, 2012 PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] Multi-dimensional spread tables [Member] Maximum [Member]	Mar. 31, 2013 PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] Multi-dimensional spread tables [Member] Weighted Average [Member]	Mar. 31, 2013 IMPAIRED LOANS [Member]	Mar. 31, 2013 OTHER REAL ESTATE OWNED [Member]
Investments in securities that are classified as level 3
Fair Value at September 30, 2012	$ 3,292				$ 3,370				$ 7,060	$ 11,645
Cumulative Prepayment		0.00%	100.00%	7.80%		10.30%	14.50%	14.50%
Cumulative Default		4.00%	100.00%	19.20%
Loss Given Default		85.00%	100.00%	95.10%
Cure Given Default		0.00%	75.00%	30.80%
Constant Default Rate						0.80%	20.50%	4.00%
Loss Severity						25.00%	62.50%	32.30%