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Loans Receivable (excluding Covered Loans) (Loans Receivable, Analysis of Age of Loans in Past Due Status) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Sep. 30, 2011 | Jun. 30, 2011
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 7,823,968 | $ 8,128,845 |
Current | 7,603,445 | 7,849,623 |
30 Days | 41,843 | 59,026 |
60 Days | 28,057 | 25,577 |
90 Days | 150,623 | 194,619 |
Total | 220,523 | 279,222 |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 2.82% | 3.43% |
Residential Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 6,217,670 |
Current |  | 6,015,464 |
30 Days |  | 54,140 |
60 Days |  | 21,985 |
90 Days |  | 126,082 |
Total |  | 202,207 |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 2.81% | 3.25% | 3.43%
Construction, Speculative [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 115,409 |
Current |  | 106,843 |
30 Days |  | 330 |
60 Days |  | 0 |
90 Days |  | 8,236 |
Total |  | 8,566 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 7.42% |
Construction, Custom [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 147,764 |
Current |  | 147,129 |
30 Days |  | 0 |
60 Days |  | 0 |
90 Days |  | 635 |
Total |  | 635 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 0.43% |
Land, Acquisition and Development [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 193,613 |
Current |  | 159,357 |
30 Days |  | 679 |
60 Days |  | 0 |
90 Days |  | 33,577 |
Total |  | 34,256 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 17.69% |
Land, Consumer Lot Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 163,146 |
Current |  | 151,849 |
30 Days |  | 1,163 |
60 Days |  | 1,291 |
90 Days |  | 8,843 |
Total |  | 11,297 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 6.92% |
Multi Family Housing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 699,340 |
Current |  | 690,765 |
30 Days |  | 0 |
60 Days |  | 1,202 |
90 Days |  | 7,373 |
Total |  | 8,575 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 1.23% |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 300,307 |
Current |  | 292,015 |
30 Days |  | 1,016 |
60 Days |  | 0 |
90 Days |  | 7,276 |
Total |  | 8,292 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 2.76% |
Commercial and Industrial Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 108,995 |
Current |  | 106,708 |
30 Days |  | 55 |
60 Days |  | 553 |
90 Days |  | 1,679 |
Total |  | 2,287 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 2.10% |
Home Equity Line of Credit [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 115,092 |
Current |  | 114,059 |
30 Days |  | 452 |
60 Days |  | 100 |
90 Days |  | 481 |
Total |  | 1,033 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 0.90% |
Consumer Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP |  | 67,509 |
Current |  | 65,434 |
30 Days |  | 1,191 |
60 Days |  | 446 |
90 Days |  | 437 |
Total |  | 2,074 |
Ratio of past due loans to total loans, net of charge-offs and LIPs |  | 3.07% |
Non-Acquired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 7,705,224 |  |
Current | 7,497,712 |  |
30 Days | 38,516 |  |
60 Days | 25,246 |  |
90 Days | 143,750 |  |
Total | 207,512 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 2.69% |  |
Non-Acquired Loans [Member] | Residential Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 5,902,633 |  |
Current | 5,736,969 |  |
30 Days | 33,571 |  |
60 Days | 19,127 |  |
90 Days | 112,966 |  |
Total | 165,664 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 2.81% |  |
Non-Acquired Loans [Member] | Construction, Speculative [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 94,930 |  |
Current | 87,134 |  |
30 Days | 899 |  |
60 Days | 509 |  |
90 Days | 6,388 |  |
Total | 7,796 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 8.21% |  |
Non-Acquired Loans [Member] | Construction, Custom [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 123,965 |  |
Current | 123,382 |  |
30 Days | 1 |  |
60 Days | 43 |  |
90 Days | 539 |  |
Total | 583 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.47% |  |
Non-Acquired Loans [Member] | Land, Acquisition and Development [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 127,953 |  |
Current | 114,563 |  |
30 Days | 234 |  |
60 Days | 3,226 |  |
90 Days | 9,930 |  |
Total | 13,390 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 10.46% |  |
Non-Acquired Loans [Member] | Land, Consumer Lot Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 145,037 |  |
Current | 136,545 |  |
30 Days | 1,753 |  |
60 Days | 895 |  |
90 Days | 5,844 |  |
Total | 8,492 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 5.86% |  |
Non-Acquired Loans [Member] | Multi Family Housing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 675,334 |  |
Current | 670,859 |  |
30 Days | 569 |  |
60 Days | 594 |  |
90 Days | 3,312 |  |
Total | 4,475 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.66% |  |
Non-Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 305,046 |  |
Current | 300,668 |  |
30 Days | 334 |  |
60 Days | 0 |  |
90 Days | 4,044 |  |
Total | 4,378 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 1.44% |  |
Non-Acquired Loans [Member] | Commercial and Industrial Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 148,565 |  |
Current | 148,546 |  |
30 Days | 9 |  |
60 Days | 10 |  |
90 Days | 0 |  |
Total | 19 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.01% |  |
Non-Acquired Loans [Member] | Home Equity Line of Credit [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 113,559 |  |
Current | 112,824 |  |
30 Days | 29 |  |
60 Days | 318 |  |
90 Days | 388 |  |
Total | 735 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.65% |  |
Non-Acquired Loans [Member] | Consumer Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 68,202 |  |
Current | 66,222 |  |
30 Days | 1,117 |  |
60 Days | 524 |  |
90 Days | 339 |  |
Total | 1,980 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 2.90% |  |
Acquired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 118,744 |  |
Current | 105,733 |  |
30 Days | 3,327 |  |
60 Days | 2,811 |  |
90 Days | 6,873 |  |
Total | 13,011 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 10.96% |  |
Acquired Loans [Member] | Residential Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 343 |  |
Current | 0 |  |
30 Days | 0 |  |
60 Days | 343 |  |
90 Days | 0 |  |
Total | 343 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 100.00% |  |
Acquired Loans [Member] | Construction, Speculative [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 1,889 |  |
Current | 1,889 |  |
30 Days | 0 |  |
60 Days | 0 |  |
90 Days | 0 |  |
Total | 0 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.00% |  |
Acquired Loans [Member] | Construction, Custom [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 0 |  |
Current | 0 |  |
30 Days | 0 |  |
60 Days | 0 |  |
90 Days | 0 |  |
Total | 0 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.00% |  |
Acquired Loans [Member] | Land, Acquisition and Development [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 4,210 |  |
Current | 3,685 |  |
30 Days | 0 |  |
60 Days | 0 |  |
90 Days | 525 |  |
Total | 525 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 12.47% |  |
Acquired Loans [Member] | Land, Consumer Lot Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 0 |  |
Current | 0 |  |
30 Days | 0 |  |
60 Days | 0 |  |
90 Days | 0 |  |
Total | 0 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.00% |  |
Acquired Loans [Member] | Multi Family Housing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 1,074 |  |
Current | 1,074 |  |
30 Days | 0 |  |
60 Days | 0 |  |
90 Days | 0 |  |
Total | 0 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 0.00% |  |
Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 90,977 |  |
Current | 80,860 |  |
30 Days | 2,072 |  |
60 Days | 1,698 |  |
90 Days | 6,347 |  |
Total | 10,117 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 11.12% |  |
Acquired Loans [Member] | Commercial and Industrial Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 5,099 |  |
Current | 4,244 |  |
30 Days | 125 |  |
60 Days | 730 |  |
90 Days | 0 |  |
Total | 855 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 16.77% |  |
Acquired Loans [Member] | Home Equity Line of Credit [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 15,037 |  |
Current | 13,912 |  |
30 Days | 1,125 |  |
60 Days | 0 |  |
90 Days | 0 |  |
Total | 1,125 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 7.48% |  |
Acquired Loans [Member] | Consumer Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount of Loan, Net of Charge-Offs and LIP | 115 |  |
Current | 69 |  |
30 Days | 5 |  |
60 Days | 40 |  |
90 Days | 1 |  |
Total | 46 |  |
Ratio of past due loans to total loans, net of charge-offs and LIPs | 40.00% |  |

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