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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, 2012 Contracts | Mar. 31, 2011 Contracts | Mar. 31, 2012 Contracts | Mar. 31, 2011 Contracts
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 113 | 53 | 132 | 95
Recorded Investment | $ 21,284 | $ 19,346 | $ 26,095 | $ 31,934
Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 108 | 47 | 125 | 87
Recorded Investment | 20,419 | 11,801 | 24,783 | 19,763
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 and Development [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 1
Recorded Investment | 0 | 0 | 0 | 4,505
Land, Consumer Lot Loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 5 | 3 | 7 | 4
Recorded Investment | 865 | 710 | 1,312 | 831
Multi Family Housing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 2 | 0 | 2
Recorded Investment | 0 | 6,613 | 0 | 6,613
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 1 | 0 | 1
Recorded Investment | 0 | 222 | 0 | 222
Commercial and Industrial Loans [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
Home Equity Line of Credit [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Recorded Investment | 0 | 0 | 0 | 0
Consumer Portfolio Segment [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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