Mortgage Loans (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Mortgage Loans (Textuals) [Abstract]
Commitment of hedged loans to third party purchasers	3 days
Percentage of mortgage loans sold to major purchasers	89.00%
Aggregate fair value of mortgage loans held for sale	$ 294.1	$ 253.8
Aggregate outstanding principal balance of mortgage loans held for sale	284.6	247.5
Net gain on sales of loans	41.6	45.9	23.6
Recourse expense	11.6	13.7	33.2
Mortgage loans held for sale not committed to third-party purchasers	80.9
Notional amounts of hedging instruments, Total	78.4
Loss reserves related to reinsurance	0.9	9.7
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives	217.5
Best-Efforts Delivery Commitments [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives	21.4
Hedging Instruments Related to IRLCs [Member]
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 178.6

Typical time period from loan origination to commitment of the loan to a third-party purchaser.

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Mortgage loans held for sale not committed to third-party purchasers.

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Mortgage loans.

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The percentage of mortgage loans sold to major purchasers during the period.

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The charge against earnings in the period for losses on other mortgage loans, real estate owned and future loan repurchase obligations due to limited recourse provisions.

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The reserves for expected future losses under the reinsurance program.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

+ References

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Carrying amount of mortgage loans to individuals not classified as held for investment but are held-for-sale.

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The carrying amount of the outstanding balance due under the mortgage loan.

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Aggregate notional amount of all derivatives designated as a fair value hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

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Aggregate notional amount of all interest rate derivatives not designated as hedging instruments. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

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