Loans Receivable And Allowance For Credit Losses (Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 9,443	$ 9,227	$ 8,822
Charge-offs	(630)	(735)	(1,142)
Recoveries	477	180	138
Provision for credit losses	(750)	771	1,409
Ending Balance	8,540	9,443	9,227
One- to Four-Family Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	8,414	8,586	8,257
Charge-offs	(542)	(663)	(1,033)
Recoveries	451	114	65
Provision for credit losses	(1,228)	377	1,297
Ending Balance	7,095	8,414	8,586
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	6,980	6,263	5,771
Charge-offs	(200)	(435)	(380)
Recoveries	77	56	1
Provision for credit losses	(827)	1,096	871
Ending Balance	6,030	6,980	6,263
One- to Four-Family Segment [Member] | Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,434	2,323	2,486
Charge-offs	(342)	(228)	(653)
Recoveries	374	58	64
Provision for credit losses	(401)	(719)	426
Ending Balance	1,065	1,434	2,323
Commercial Real Estate Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	742	400	185
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for credit losses	466	342	215
Ending Balance	1,208	742	400
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	287	241	380
Charge-offs	(88)	(72)	(109)
Recoveries	26	66	73
Provision for credit losses	12	52	(103)
Ending Balance	$ 237	$ 287	$ 241