Loans Receivable And Allowance For Credit Losses (Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 8,540	$ 9,443
Charge-offs	(32)	(250)
Recoveries	13	8
Provision for credit losses	0	0
Ending Balance	8,521	9,201
One- to Four-Family Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	7,095	8,414
Charge-offs	(24)	(232)
Recoveries	0	3
Provision for credit losses	(252)	(63)
Ending Balance	6,819	8,122
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,928	4,865
Charge-offs	(24)	(57)
Recoveries	0	3
Provision for credit losses	(161)	1
Ending Balance	3,743	4,812
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,102	2,115
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(38)	(95)
Ending Balance	2,064	2,020
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,065	1,434
Charge-offs	0	(175)
Recoveries	0	0
Provision for credit losses	(53)	31
Ending Balance	1,012	1,290
Commercial Real Estate Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,208	742
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	287	59
Ending Balance	1,495	801
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	237	287
Charge-offs	(8)	(18)
Recoveries	13	5
Provision for credit losses	(35)	4
Ending Balance	$ 207	$ 278