Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Instant Related Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment, No Related Allowance	$ 29,582	$ 27,411
Recorded Investment, Allowance Recorded	28,068	38,130
Recorded Investment	57,650	65,541
Unpaid Principal Balance, No Related Allowance	33,582	31,175
Unpaid Principal Balance, Allowance Recorded	28,131	38,211
Unpaid Principal Balance	61,713	69,386
Related ACL	141	319
One-To Four-Family Loans - Originated [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, No Related Allowance	14,413	12,950
Recorded Investment, Allowance Recorded	25,709	35,520
Recorded Investment	40,122	48,470
Unpaid Principal Balance, No Related Allowance	14,996	13,543
Unpaid Principal Balance, Allowance Recorded	25,796	35,619
Unpaid Principal Balance	40,792	49,162
Related ACL	64	209
One-To Four-Family Loans - Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, No Related Allowance	14,565	13,882
Recorded Investment, Allowance Recorded	1,825	2,034
Recorded Investment	16,390	15,916
Unpaid Principal Balance, No Related Allowance	17,614	16,645
Unpaid Principal Balance, Allowance Recorded	1,801	2,015
Unpaid Principal Balance	19,415	18,660
Related ACL	50	29
Multi-Family And Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, Allowance Recorded		73
Recorded Investment		73
Unpaid Principal Balance, Allowance Recorded		74
Unpaid Principal Balance		74
Related ACL		2
Consumer - Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, No Related Allowance	596	577
Recorded Investment, Allowance Recorded	526	492
Recorded Investment	1,122	1,069
Unpaid Principal Balance, No Related Allowance	956	980
Unpaid Principal Balance, Allowance Recorded	526	492
Unpaid Principal Balance	1,482	1,472
Related ACL	27	78
Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, No Related Allowance	8	2
Recorded Investment, Allowance Recorded	8	11
Recorded Investment	16	13
Unpaid Principal Balance, No Related Allowance	16	7
Unpaid Principal Balance, Allowance Recorded	8	11
Unpaid Principal Balance	24	18
Related ACL		$ 1