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Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 56,748	$ 67,810
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 43,856	$ 59,074
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	77.30%	87.10%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 0	$ 754
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	1.10%
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 2,518	$ 732
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	4.40%	1.10%
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 509	$ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.90%	0.00%
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 939	$ 1,273
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	1.70%	1.90%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 1,538	$ 2,558
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.70%	3.80%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 6,681	$ 2,176
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	11.80%	3.20%
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 115	$ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	0.00%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 473	$ 563
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.80%	0.80%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 119	$ 680
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	1.00%

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Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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