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Loans Receivable (excluding Covered Loans) (Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Dec. 31, 2012 Contracts | Dec. 31, 2011 Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 118 | 825
Pre-Modification Outstanding Recorded Investment | $ 33,746 | $ 212,297
Post-Modification Outstanding Recorded Investment | 33,746 | 212,297
Loan Modification, Basis Point Reduction, Minimum | 1.00% |
Loan Modification, Basis Point Reduction, Maximum | 2.00% |
Single Family Residential Loans as Percentage of Restructured Loans | 84.00% |
Residential Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 105 | 700
Pre-Modification Outstanding Recorded Investment | 29,339 | 183,492
Post-Modification Outstanding Recorded Investment | 29,339 | 183,492
Construction, Speculative [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 1 | 24
Pre-Modification Outstanding Recorded Investment | 2,503 | 6,409
Post-Modification Outstanding Recorded Investment | 2,503 | 6,409
Construction, Custom [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 1
Pre-Modification Outstanding Recorded Investment | 0 | 1,196
Post-Modification Outstanding Recorded Investment | 0 | 1,196
Land, Acquisition and Development [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 25
Pre-Modification Outstanding Recorded Investment | 0 | 8,524
Post-Modification Outstanding Recorded Investment | 0 | 8,524
Land, Consumer Lot Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 11 | 65
Pre-Modification Outstanding Recorded Investment | 1,836 | 9,017
Post-Modification Outstanding Recorded Investment | 1,836 | 9,017
Multi Family Housing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 1 | 5
Pre-Modification Outstanding Recorded Investment | 68 | 3,161
Post-Modification Outstanding Recorded Investment | 68 | 3,161
Commercial Real Estate Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 1
Pre-Modification Outstanding Recorded Investment | 0 | 308
Post-Modification Outstanding Recorded Investment | 0 | 308
Commercial and Industrial Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 1
Pre-Modification Outstanding Recorded Investment | 0 | 5
Post-Modification Outstanding Recorded Investment | 0 | 5
Home Equity Line of Credit [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 3
Pre-Modification Outstanding Recorded Investment | 0 | 185
Post-Modification Outstanding Recorded Investment | 0 | 185
Consumer Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Contracts (in contracts) | 0 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 0

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