Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Duration Related Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	$ 28,344	$ 23,345	$ 27,489	$ 24,304
Average Recorded Investment, Allowance Recorded	30,850	45,782	34,219	45,181
Average Recorded Investment	59,194	69,127	61,708	69,485
Interest Income Recognized, No Related Allowance	157	129	307	258
Interest Income Recognized, Allowance Recorded	313	482	654	965
Interest Income Recognized	470	611	961	1,223
One-To Four-Family Loans - Originated [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	14,022	7,784	13,263	8,572
Average Recorded Investment, Allowance Recorded	28,010	42,937	31,021	42,457
Average Recorded Investment	42,032	50,721	44,284	51,029
Interest Income Recognized, No Related Allowance	102	63	199	139
Interest Income Recognized, Allowance Recorded	295	452	614	905
Interest Income Recognized	397	515	813	1,044
One-To Four-Family Loans - Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	13,706	15,058	13,645	15,108
Average Recorded Investment, Allowance Recorded	2,287	2,136	2,573	2,145
Average Recorded Investment	15,993	17,194	16,218	17,253
Interest Income Recognized, No Related Allowance	47	51	92	97
Interest Income Recognized, Allowance Recorded	12	21	28	46
Interest Income Recognized	59	72	120	143
Multi-Family And Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, Allowance Recorded		78	31	44
Average Recorded Investment		78	31	44
Interest Income Recognized, Allowance Recorded			1
Interest Income Recognized			1
Consumer - Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	611	474	577	596
Average Recorded Investment, Allowance Recorded	542	605	581	507
Average Recorded Investment	1,153	1,079	1,158	1,103
Interest Income Recognized, No Related Allowance	8	15	16	22
Interest Income Recognized, Allowance Recorded	6	9	11	14
Interest Income Recognized	14	24	27	36
Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	5	29	4	28
Average Recorded Investment, Allowance Recorded	11	26	13	28
Average Recorded Investment	$ 16	$ 55	$ 17	$ 56