Loans Receivable And Allowance For Credit Losses (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2012 SVAs Charged Off In Prior Period Due To Loan Charge Off Policy Change [Member]	Sep. 30, 2014 Doubtful [Member]	Sep. 30, 2013 Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Serviced loans for others, aggregate amount	$ 237,700,000	$ 195,000,000
Escrow balances on loans serviced for others	4,100,000	3,400,000
CFPB debt to income ratio for borrowers		43.00%
Loan-to-value ratio for securing multi-family and commercial real estate loans, maximum		80.00%
Loans receivable	5,958,868,000	6,233,170,000		0	0
Net charge-offs	1,200,000
Regulatory net charge-offs	381,000
ACL	8,822,000	9,227,000	3,500,000
ACL maintained for individually evaluated impaired loans	$ 0	$ 0