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Loans Receivable (excluding Covered Loans) (Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2012 Contracts | Jun. 30, 2011 Contracts | Jun. 30, 2012 Contracts | Jun. 30, 2011 Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 213 | 169 | 769 | 527
Pre-Modification Outstanding Recorded Investment | $ 51,339 | $ 46,446 | $ 184,824 | $ 150,295
Post-Modification Outstanding Recorded Investment | 51,339 | 46,446 | 184,824 | 150,295
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 | 83.20% |  | 83.20% |
Residential Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 199 | 155 | 681 | 481
Pre-Modification Outstanding Recorded Investment | 43,104 | 39,362 | 159,651 | 131,018
Post-Modification Outstanding Recorded Investment | 43,104 | 39,362 | 159,651 | 131,018
Construction, Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 1 | 22 | 2
Pre-Modification Outstanding Recorded Investment | 0 | 337 | 6,253 | 529
Post-Modification Outstanding Recorded Investment | 0 | 337 | 6,253 | 529
Construction, Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 1 | 0 | 1 | 0
Pre-Modification Outstanding Recorded Investment | 1,196 | 0 | 1,196 | 0
Post-Modification Outstanding Recorded Investment | 1,196 | 0 | 1,196 | 0
Land, Acquisition and Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 3 | 26 | 3
Pre-Modification Outstanding Recorded Investment | 0 | 4,427 | 5,565 | 4,427
Post-Modification Outstanding Recorded Investment | 0 | 4,427 | 5,565 | 4,427
Land, Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 8 | 9 | 30 | 34
Pre-Modification Outstanding Recorded Investment | 965 | 1,335 | 3,906 | 5,175
Post-Modification Outstanding Recorded Investment | 965 | 1,335 | 3,906 | 5,175
Multi Family Housing [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 1 | 1 | 3 | 7
Pre-Modification Outstanding Recorded Investment | 389 | 985 | 2,257 | 9,146
Post-Modification Outstanding Recorded Investment | 389 | 985 | 2,257 | 9,146
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 2 | 0 | 3 | 0
Pre-Modification Outstanding Recorded Investment | 5,572 | 0 | 5,881 | 0
Post-Modification Outstanding Recorded Investment | 5,572 | 0 | 5,881 | 0
Commercial and Industrial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 1 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0 | 2 | 0
Post-Modification Outstanding Recorded Investment | 0 | 0 | 2 | 0
Home Equity Line of Credit [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 2 | 0 | 2 | 0
Pre-Modification Outstanding Recorded Investment | 113 | 0 | 113 | 0
Post-Modification Outstanding Recorded Investment | 113 | 0 | 113 | 0
Consumer Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Number of Contracts (in contracts) | 0 | 0 | 0 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0

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