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Loans Receivable (excluding Covered Loans) (Loan Modifications) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2013 Contracts | Mar. 31, 2012 Contracts | Mar. 31, 2013 Contracts | Mar. 31, 2012 Contracts
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 41 | 113 | 60 | 132
Recorded Investment | $ 8,886 | $ 21,284 | $ 14,313 | $ 26,095
Single-Family Residential [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 37 | 108 | 55 | 125
Recorded Investment | 8,579 | 20,419 | 13,704 | 24,783
Construction - Speculative [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
Construction - Custom [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
Land - Acquisition & Development [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
Land - Consumer Lot Loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 1 | 5 | 1 | 7
Recorded Investment | 139 | 865 | 139 | 1,312
Multi-Family [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 1 | 0 | 1 | 0
Recorded Investment | 55 | 0 | 55 | 0
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 1 | 0
Recorded Investment | 0 | 0 | 302 | 0
Commercial & Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
HELOC [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 2 | 0 | 2 | 0
Recorded Investment | 113 | 0 | 113 | 0
Consumer [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0

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