Loans Receivable And Allowance For Credit Losses (LTV And Credit Score Information For Originated And Purchased One-To Four-Family Loans And Originated Consumer Home Equity Loans) (Details)	Dec. 31, 2011	Sep. 30, 2011
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	760	759
Weighted average LTV	64.00%	64.00%
One-To Four-Family Loans - Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	763	762
Weighted average LTV	66.00%	66.00%
One-To Four-Family Loans - Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	740	740
Weighted average LTV	60.00%	60.00%
Consumer - Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	744	742
Weighted average LTV	19.00%	20.00%