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Loans Receivable (excluding Covered Loans) - Loans Impaired, Loan Commitments and Loans Serviced (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Receivables [Abstract]
Recorded investment in impaired loans	$ 435,185	$ 454,557
Trouble Debt Restructuring included in impaired loans	374,743	415,696
Impaired loans with allocated reserves	196	6,035
Reserves on impaired loans	60	3,473
Average balance of impaired loans	403,138	495,472
Interest income from impaired loans	21,674	24,798
Outstanding fixed-rate origination commitments	198,504	190,363
Loans serviced for others	$ 86,745	$ 55,589

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

+ Details

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X

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

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X

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

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- Definition

Financing Receivable, Average Balance of Impaired Loans

+ References

No definition available.

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- Definition

Impaired Financing Receivable with Allocated Reserves

+ References

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- Definition

Loans and Leases Receivable, Loan Origination Commitments Outstanding

+ References

No definition available.

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- Definition

Loans Serviced for Others

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No definition available.

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- Definition

Recorded investment in impaired loans

+ References

No definition available.

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