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Loans Receivable (excluding Covered Loans) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | $ 7,830,112 | $ 7,866,336 |  |
Ratio of type of loan to total loans receivable | 100.00% | 100.00% |  |
Allowance for probable losses | 122,884 | 133,147 | 126,827 | 157,160
Loans in process | 189,336 | 213,286 |  |
Discount on acquired loans | 40,346 | 33,484 |  |
Deferred net origination fees | 33,330 | 34,421 |  |
Charges against loans receivable | 385,896 | 414,338 |  |
Loans receivable, net | 7,444,216 | 7,451,998 |  |
Single-Family Residential [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 5,390,743 | 5,779,264 |  |
Ratio of type of loan to total loans receivable | 68.80% | 73.50% |  |
Allowance for probable losses | 77,422 | 81,815 | 77,508 | 83,307
Construction - Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 122,544 | 131,526 |  |
Ratio of type of loan to total loans receivable | 1.50% | 1.70% |  |
Allowance for probable losses | 7,757 | 12,060 | 8,660 | 13,828
Construction - Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 217,349 | 211,690 |  |
Ratio of type of loan to total loans receivable | 2.80% | 2.70% |  |
Allowance for probable losses | 262 | 347 | 275 | 623
Land - Acquisition & Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 99,509 | 128,379 |  |
Ratio of type of loan to total loans receivable | 1.20% | 1.60% |  |
Allowance for probable losses | 12,221 | 15,598 | 15,056 | 32,719
Land - Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 133,875 | 141,844 |  |
Ratio of type of loan to total loans receivable | 1.80% | 1.80% |  |
Allowance for probable losses | 3,941 | 4,937 | 4,963 | 5,520
Multi-Family [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 733,036 | 710,741 |  |
Ratio of type of loan to total loans receivable | 9.50% | 9.00% |  |
Allowance for probable losses | 4,272 | 5,280 | 5,107 | 7,623
Commercial Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 642,556 | 406,364 |  |
Ratio of type of loan to total loans receivable | 8.10% | 5.20% |  |
Allowance for probable losses | 4,156 | 1,956 | 2,651 | 4,331
Commercial & Industrial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 288,944 | 166,115 |  |
Ratio of type of loan to total loans receivable | 3.70% | 2.10% |  |
Allowance for probable losses | 8,628 | 7,626 | 8,062 | 5,099
HELOC [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 137,473 | 126,942 |  |
Ratio of type of loan to total loans receivable | 1.80% | 1.60% |  |
Allowance for probable losses | 1,031 | 965 | 1,044 | 1,139
Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 64,083 | 63,471 |  |
Ratio of type of loan to total loans receivable | 0.80% | 0.80% |  |
Allowance for probable losses | 3,194 | 2,563 | 3,501 | 2,971
Non-Acquired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 7,403,267 | 7,755,219 |  |
Ratio of type of loan to total loans receivable | 94.50% | 98.60% |  |
Non-Acquired Loans [Member] | Single-Family Residential [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 5,374,977 | 5,778,922 |  |
Ratio of type of loan to total loans receivable | 68.60% | 73.50% |  |
Non-Acquired Loans [Member] | Construction - Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 120,617 | 129,637 |  |
Ratio of type of loan to total loans receivable | 1.50% | 1.60% |  |
Non-Acquired Loans [Member] | Construction - Custom [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 217,036 | 211,690 |  |
Ratio of type of loan to total loans receivable | 2.80% | 2.70% |  |
Non-Acquired Loans [Member] | Land - Acquisition & Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 93,496 | 124,677 |  |
Ratio of type of loan to total loans receivable | 1.20% | 1.60% |  |
Non-Acquired Loans [Member] | Land - Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 130,056 | 141,844 |  |
Ratio of type of loan to total loans receivable | 1.70% | 1.80% |  |
Non-Acquired Loans [Member] | Multi-Family [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 725,322 | 710,140 |  |
Ratio of type of loan to total loans receivable | 9.30% | 9.00% |  |
Non-Acquired Loans [Member] | Commercial Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 385,587 | 319,210 |  |
Ratio of type of loan to total loans receivable | 4.90% | 4.10% |  |
Non-Acquired Loans [Member] | Commercial & Industrial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 190,598 | 162,823 |  |
Ratio of type of loan to total loans receivable | 2.40% | 2.10% |  |
Non-Acquired Loans [Member] | HELOC [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 111,622 | 112,902 |  |
Ratio of type of loan to total loans receivable | 1.40% | 1.40% |  |
Non-Acquired Loans [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 53,956 | 63,374 |  |
Ratio of type of loan to total loans receivable | 0.70% | 0.80% |  |
Acquired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 327,383 | 0 |  |
Ratio of type of loan to total loans receivable | 4.20% | 0.00% |  |
Acquired Loans [Member] | Single-Family Residential [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 15,428 | 0 |  |
Ratio of type of loan to total loans receivable | 0.20% | 0.00% |  |
Acquired Loans [Member] | Construction - Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 177 | 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 | 313 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Land - Acquisition & Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 3,436 | 0 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Acquired Loans [Member] | Land - Consumer Lot Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 3,819 | 0 |  |
Ratio of type of loan to total loans receivable | 0.10% | 0.00% |  |
Acquired Loans [Member] | Multi-Family [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 7,714 | 0 |  |
Ratio of type of loan to total loans receivable | 0.20% | 0.00% |  |
Acquired Loans [Member] | Commercial Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 177,101 | 0 |  |
Ratio of type of loan to total loans receivable | 2.10% | 0.00% |  |
Acquired Loans [Member] | Commercial & Industrial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 96,255 | 0 |  |
Ratio of type of loan to total loans receivable | 1.30% | 0.00% |  |
Acquired Loans [Member] | HELOC [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 13,094 | 0 |  |
Ratio of type of loan to total loans receivable | 0.20% | 0.00% |  |
Acquired Loans [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 10,046 | 0 |  |
Ratio of type of loan to total loans receivable | 0.10% | 0.00% |  |
Credit Impaired Acquired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 99,462 | 111,117 |  |
Ratio of type of loan to total loans receivable | 1.30% | 1.40% |  |
Credit Impaired Acquired Loans [Member] | Single-Family Residential [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 338 | 342 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Credit Impaired Acquired Loans [Member] | Construction - Speculative [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 1,750 | 1,889 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.10% |  |
Credit Impaired Acquired Loans [Member] | Land - Acquisition & Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 2,577 | 3,702 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Credit Impaired Acquired Loans [Member] | Multi-Family [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 0 | 601 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Credit Impaired Acquired Loans [Member] | Commercial Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 79,868 | 87,154 |  |
Ratio of type of loan to total loans receivable | 1.10% | 1.10% |  |
Credit Impaired Acquired Loans [Member] | Commercial & Industrial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 2,091 | 3,292 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |
Credit Impaired Acquired Loans [Member] | HELOC [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | 12,757 | 14,040 |  |
Ratio of type of loan to total loans receivable | 0.20% | 0.20% |  |
Credit Impaired Acquired Loans [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, gross | $ 81 | $ 97 |  |
Ratio of type of loan to total loans receivable | 0.00% | 0.00% |  |

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of deferred interest and fee income, 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. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph a(i-v) -Chapter V -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 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 -Section 563c.102 -Paragraph 8 -Subparagraph f -Chapter V -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 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 6: 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=7512638&loc=d3e5074-111524 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph e -Chapter V -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 8: 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 9: 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 10: 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 Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: 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 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. + Details
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- Definition Amount of undisbursed portion of the loan receivable balance (loans in process). Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph g -Chapter V -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. + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: 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 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 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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