Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Duration Related Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	$ 27,333	$ 25,079	$ 54,469
Average Recorded Investment, Allowance Recorded	31,092	43,257	17,256
Average Recorded Investment	58,425	68,336	71,725
Interest Income Recognized, No Related Allowance	661	546	308
Interest Income Recognized, Allowance Recorded	1,193	1,752	1,385
Interest Income Recognized	1,854	2,298	1,693
One-To Four-Family Loans - Originated [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	13,455	9,763	41,396
Average Recorded Investment, Allowance Recorded	28,171	40,590	10,886
Average Recorded Investment	41,626	50,353	52,282
Interest Income Recognized, No Related Allowance	416	321	176
Interest Income Recognized, Allowance Recorded	1,117	1,651	1,330
Interest Income Recognized	1,533	1,972	1,506
One-To Four-Family Loans - Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	13,305	14,730	12,296
Average Recorded Investment, Allowance Recorded	2,334	2,052	6,138
Average Recorded Investment	15,639	16,782	18,434
Interest Income Recognized, No Related Allowance	212	186	126
Interest Income Recognized, Allowance Recorded	53	74	51
Interest Income Recognized	265	260	177
Multi-Family And Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	0	0	223
Average Recorded Investment, Allowance Recorded	17	58	0
Average Recorded Investment	17	58	223
Interest Income Recognized, No Related Allowance	0	0	0
Interest Income Recognized, Allowance Recorded	1	3	0
Interest Income Recognized	1	3	0
Consumer - Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	567	567	543
Average Recorded Investment, Allowance Recorded	558	534	226
Average Recorded Investment	1,125	1,101	769
Interest Income Recognized, No Related Allowance	33	39	6
Interest Income Recognized, Allowance Recorded	22	23	4
Interest Income Recognized	55	62	10
Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	6	19	11
Average Recorded Investment, Allowance Recorded	12	23	6
Average Recorded Investment	18	42	17
Interest Income Recognized, No Related Allowance	0	0	0
Interest Income Recognized, Allowance Recorded	0	1	0
Interest Income Recognized	$ 0	$ 1	$ 0