Loans Receivable And Allowance For Credit Losses (Recorded Investment In Loans, Less SVAs) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Financing Receivable, Recorded Investment [Line Items]
Multi-family and commercial	$ 52,524	$ 57,965
Consumer - home equity	160,029	164,541
Consumer - other	7,355	7,224
Total loans receivable	5,282,485	5,195,876
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
One-to four-family - originated	28,825	32,673
One-to four-family - purchased	435	447
Multi-family and commercial	2,864	7,683
Consumer - home equity	237	50
Total loans receivable	32,361	40,853
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
One-to four-family - originated	22,697	18,419
One-to four-family - purchased	16,481	15,987
Consumer - home equity	631	592
Consumer - other	9	5
Total loans receivable	$ 39,818	$ 35,003