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Loans Receivable (excluding Covered Loans) (Details) (USD $) | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Sep. 30, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | $ 8,031,138,000 | $ 8,299,074,000 |  |
Ratio of type of loan to total loans receivable | 100.00% | 100.00% |  |
Allowance for probable losses | 143,819,000 | 157,160,000 | 154,540,000 | 163,094,000
Loans in process | 133,379,000 | 170,229,000 |  |
Discount on acquired loans | 43,687,000 | 0 |  |
Deferred net origination fees | 34,236,000 | 35,808,000 |  |
Charges against loans receivable | 355,121,000 | 363,197,000 |  |
Loans receivable, net | 7,676,017,000 | 7,935,877,000 |  |
Residential Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 5,973,633,000 | 6,218,878,000 |  |
Ratio of type of loan to total loans receivable | 74.40% | 74.70% |  |
Allowance for probable losses | 83,875,000 | 83,307,000 | 84,793,000 | 47,160,000
Construction, Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 128,858,000 | 140,459,000 |  |
Ratio of type of loan to total loans receivable | 1.60% | 1.90% |  |
Allowance for probable losses | 15,943,000 | 13,828,000 | 14,640,000 | 26,346,000
Construction, Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 235,566,000 | 279,851,000 |  |
Ratio of type of loan to total loans receivable | 2.90% | 2.90% |  |
Allowance for probable losses | 384,000 | 623,000 | 457,000 | 770,000
Land, Acquisition and Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 156,457,000 | 200,692,000 |  |
Ratio of type of loan to total loans receivable | 2.00% | 3.50% |  |
Allowance for probable losses | 19,929,000 | 32,719,000 | 29,089,000 | 61,637,000
Land, Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 149,967,000 | 163,146,000 |  |
Ratio of type of loan to total loans receivable | 1.90% | 2.10% |  |
Allowance for probable losses | 7,712,000 | 5,520,000 | 8,283,000 | 4,793,000
Multi Family Housing [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 687,696,000 | 700,673,000 |  |
Ratio of type of loan to total loans receivable | 8.50% | 7.90% |  |
Allowance for probable losses | 4,837,000 | 7,623,000 | 6,543,000 | 5,050,000
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 394,488,000 | 303,442,000 |  |
Ratio of type of loan to total loans receivable | 4.90% | 3.60% |  |
Allowance for probable losses | 2,869,000 | 4,331,000 | 2,739,000 | 3,165,000
Commercial and Industrial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 102,684,000 | 109,332,000 |  |
Ratio of type of loan to total loans receivable | 1.30% | 1.00% |  |
Allowance for probable losses | 4,427,000 | 5,099,000 | 4,421,000 | 6,193,000
Home Equity Line of Credit [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 130,583,000 | 115,092,000 |  |
Ratio of type of loan to total loans receivable | 1.60% | 1.30% |  |
Allowance for probable losses | 969,000 | 1,139,000 | 972,000 | 586,000
Consumer Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 71,206,000 | 67,509,000 |  |
Ratio of type of loan to total loans receivable | 0.90% | 1.10% |  |
Allowance for probable losses | 2,874,000 | 2,971,000 | 2,603,000 | 7,394,000
Non-Acquired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 7,896,828,000 | 8,299,074,000 |  |
Ratio of type of loan to total loans receivable | 98.40% | 100.00% |  |
Non-Acquired Loans [Member] | Residential Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 5,971,540,000 | 6,218,878,000 |  |
Ratio of type of loan to total loans receivable | 74.40% | 74.70% |  |
Non-Acquired Loans [Member] | Construction, Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 128,719,000 | 140,459,000 |  |
Ratio of type of loan to total loans receivable | 1.60% | 1.90% |  |
Non-Acquired Loans [Member] | Construction, Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 235,566,000 | 279,851,000 |  |
Ratio of type of loan to total loans receivable | 2.90% | 2.90% |  |
Non-Acquired Loans [Member] | Land, Acquisition and Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 151,967,000 | 200,692,000 |  |
Ratio of type of loan to total loans receivable | 1.90% | 3.50% |  |
Non-Acquired Loans [Member] | Land, Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 149,967,000 | 163,146,000 |  |
Ratio of type of loan to total loans receivable | 1.90% | 2.10% |  |
Non-Acquired Loans [Member] | Multi Family Housing [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 686,467,000 | 700,673,000 |  |
Ratio of type of loan to total loans receivable | 8.50% | 7.90% |  |
Non-Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 293,234,000 | 303,442,000 |  |
Ratio of type of loan to total loans receivable | 3.70% | 3.60% |  |
Non-Acquired Loans [Member] | Commercial and Industrial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 94,919,000 | 109,332,000 |  |
Ratio of type of loan to total loans receivable | 1.20% | 1.00% |  |
Non-Acquired Loans [Member] | Home Equity Line of Credit [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 113,368,000 | 115,092,000 |  |
Ratio of type of loan to total loans receivable | 1.40% | 1.30% |  |
Non-Acquired Loans [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 71,081,000 | 67,509,000 |  |
Ratio of type of loan to total loans receivable | 0.90% | 1.10% |  |
Acquired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 134,310,000 | 0 |  |
Ratio of type of loan to total loans receivable | 1.60% | 0.00% |  |
Acquired Loans [Member] | Residential Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 2,093,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Construction, Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 139,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Construction, Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 0 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Land, Acquisition and Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 4,490,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.10% | 0.00% |  |
Acquired Loans [Member] | Land, Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 0 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Multi Family Housing [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 1,229,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 101,254,000 | 0 |  |
Ratio of type of loan to total loans receivable | 1.20% | 0.00% |  |
Acquired Loans [Member] | Commercial and Industrial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 7,765,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.10% | 0.00% |  |
Acquired Loans [Member] | Home Equity Line of Credit [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 17,215,000 | 0 |  |
Ratio of type of loan to total loans receivable | 0.20% | 0.00% |  |
Acquired Loans [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | $ 125,000 | $ 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |

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- Definition Reflects the cumulative amount of interest and fees paid by borrowers which have not yet been taken into income in conformity with GAAP. Also reflects the amount of unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans that are being amortized into income as an adjustment to yield. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6378556&loc=d3e10152-111534 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Subsection I -Paragraph 8 -Subparagraph a(i-v) -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 23 -Subparagraph a(i)(d) -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=6952072&loc=d3e45377-112738 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph f -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph e -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524 + Details
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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 The undisbursed portion of the loan receivable balance (loans in process) which is deducted separately from total loans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Subsection I -Paragraph 8 -Subparagraph g -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. + Details
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- Definition Reflects the aggregate carrying amount of all categories of loans and leases held in portfolio, net of unearned 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Loans and Leases Receivable, Charges to Allowance, Loans in Process and Deferred Fees + References No definition available. + Details
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