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Allowance for Losses on Loans (Credit Risk Profile Based on Payment Activity) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2012 | Sep. 30, 2011 | Mar. 31, 2011
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | $ 8,031,138 | $ 8,299,074 |
Nonaccrual loans by portfolio segment | 166,153 | 210,465 | 221,736
Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 7,539,322 | 7,804,613 |
Grade as percentage of total gross loans | 94.50% | 94.10% |
Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 51,760 | 76,285 |
Grade as percentage of total gross loans | 0.60% | 0.90% |
Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 437,620 | 415,550 |
Grade as percentage of total gross loans | 4.90% | 5.00% |
Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 1,900 | 2,245 |
Grade as percentage of total gross loans | 0.00% | 0.00% |
Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 7,730,675 | 8,088,609 |
Grade as percentage of total gross loans | 97.90% | 97.50% |
Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 286,248 |  | 399,295
Grade as percentage of total gross loans | 2.11% |  | 2.98%
Nonaccrual loans by portfolio segment | 166,153 | 210,465 |
Grade as a percetage of total gross loans | 2.10% | 2.50% |
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 5,973,633 | 6,218,878 |
Nonaccrual loans by portfolio segment | 116,284 | 126,624 |
Residential Portfolio Segment [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 6,047,279 |
Residential Portfolio Segment [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Residential Portfolio Segment [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 171,599 |
Residential Portfolio Segment [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Residential Portfolio Segment [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 5,855,256 | 6,092,254 |
Grade as percentage of total gross loans | 98.10% | 98.00% |
Residential Portfolio Segment [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 116,284 | 126,624 |
Grade as a percetage of total gross loans | 1.90% | 2.00% |
Construction, Speculative [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 128,858 | 140,459 |
Nonaccrual loans by portfolio segment | 8,190 | 15,383 |
Construction, Speculative [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 56,485 |
Construction, Speculative [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 21,035 |
Construction, Speculative [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 62,939 |
Construction, Speculative [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Construction, Speculative [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 120,529 | 125,076 |
Grade as percentage of total gross loans | 93.60% | 89.00% |
Construction, Speculative [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 8,190 | 15,383 |
Grade as a percetage of total gross loans | 6.40% | 11.00% |
Construction, Custom [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 235,566 | 279,851 |
Nonaccrual loans by portfolio segment | 539 | 635 |
Construction, Custom [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 279,851 |
Construction, Custom [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Construction, Custom [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Construction, Custom [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Construction, Custom [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 235,027 | 279,216 |
Grade as percentage of total gross loans | 99.80% | 99.80% |
Construction, Custom [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 539 | 635 |
Grade as a percetage of total gross loans | 0.20% | 0.20% |
Land, Acquisition and Development [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 156,457 | 200,692 |
Nonaccrual loans by portfolio segment | 25,036 | 37,339 |
Land, Acquisition and Development [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 44,888 |
Land, Acquisition and Development [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 44,840 |
Land, Acquisition and Development [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 110,964 |
Land, Acquisition and Development [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Land, Acquisition and Development [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 126,931 | 163,353 |
Grade as percentage of total gross loans | 83.50% | 81.40% |
Land, Acquisition and Development [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 25,036 | 37,339 |
Grade as a percetage of total gross loans | 16.50% | 18.60% |
Land, Consumer Lot Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 149,967 | 163,146 |
Nonaccrual loans by portfolio segment | 5,641 | 8,843 |
Land, Consumer Lot Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 162,670 |
Land, Consumer Lot Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Land, Consumer Lot Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 476 |
Land, Consumer Lot Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Land, Consumer Lot Loans [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 144,326 | 154,303 |
Grade as percentage of total gross loans | 96.20% | 94.60% |
Land, Consumer Lot Loans [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 5,641 | 8,843 |
Grade as a percetage of total gross loans | 3.80% | 5.40% |
Multi Family Housing [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 687,696 | 700,673 |
Nonaccrual loans by portfolio segment | 4,530 | 7,664 |
Multi Family Housing [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 663,582 |
Multi Family Housing [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 4,629 |
Multi Family Housing [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 32,462 |
Multi Family Housing [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Multi Family Housing [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 681,937 | 693,009 |
Grade as percentage of total gross loans | 99.30% | 98.90% |
Multi Family Housing [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 4,530 | 7,664 |
Grade as a percetage of total gross loans | 0.70% | 1.10% |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 394,488 | 303,442 |
Nonaccrual loans by portfolio segment | 4,997 | 11,380 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 264,083 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 4,125 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 35,234 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Commercial Real Estate Portfolio Segment [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 288,237 | 292,062 |
Grade as percentage of total gross loans | 98.30% | 96.20% |
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 4,997 | 11,380 |
Grade as a percetage of total gross loans | 1.70% | 3.80% |
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 102,684 | 109,332 |
Nonaccrual loans by portfolio segment | 1 | 1,679 |
Commercial and Industrial Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 104,171 |
Commercial and Industrial Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 1,128 |
Commercial and Industrial Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 1,407 |
Commercial and Industrial Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 2,245 |
Commercial and Industrial Loans [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 94,918 | 107,653 |
Grade as percentage of total gross loans | 100.00% | 98.50% |
Commercial and Industrial Loans [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 1 | 1,679 |
Grade as a percetage of total gross loans | 0.00% | 1.50% |
Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 130,583 | 115,092 |
Nonaccrual loans by portfolio segment | 591 | 481 |
Home Equity Line of Credit [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 115,092 |
Home Equity Line of Credit [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Home Equity Line of Credit [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Home Equity Line of Credit [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Home Equity Line of Credit [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 112,777 | 114,611 |
Grade as percentage of total gross loans | 99.50% | 99.60% |
Home Equity Line of Credit [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | 591 | 481 |
Grade as a percetage of total gross loans | 0.50% | 0.40% |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 71,206 | 67,509 |
Nonaccrual loans by portfolio segment | 344 | 437 |
Consumer Portfolio Segment [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 66,512 |
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 528 |
Consumer Portfolio Segment [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 469 |
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross |  | 0 |
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans receivable, gross | 70,737 | 67,072 |
Grade as percentage of total gross loans | 99.50% | 99.40% |
Consumer Portfolio Segment [Member] | Nonperforming Financing Receivable [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccrual loans by portfolio segment | $ 344 | $ 437 |
Grade as a percetage of total gross loans | 0.50% | 0.60% |

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- Definition Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on loans and leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 + Details
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- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph g -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524 + Details
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- Definition Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans. + References No definition available. + Details
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