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Loan and Lease Finance Receivables and Allowance for Credit Losses - Schedule Activity of Loans Held-for-Sale (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Write-down of loans held-for-sale |  | $ (1,700,000)
Non-Covered Loans Held-for-Sale Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance, beginning of period | 348,000 | 2,954,000
Originations of mortgage loans | 25,489,000 | 37,304,000
Sales of mortgage loans | (22,250,000) | (34,962,000)
Transfer of mortgage loans to held-for-investment | (3,587,000) | (3,292,000)
Sales of other loans |  | (6,000,000)
Transfers of other loans to held-for-sale |  | 6,000,000
Write-down of loans held-for-sale |  | (1,656,000)
Balance, end of period |  | 348,000
Covered Loans Held-for-Sale Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance, beginning of period | 5,664,000 |
Sales of other loans | (3,745,000) |
Transfers of other loans to held-for-sale |  | 5,726,000
Write-down of loans held-for-sale | (1,219,000) | 0
Payment on other loans | (700,000) | (62,000)
Balance, end of period |  | $ 5,664,000

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- Definition Reflects the carrying amount of loans held for sale not otherwise specified in the existing taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 65 -Paragraph 4, 5, 6, 7, 8, 9, 12, 17, 28, 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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(a)(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph h(i) -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 The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -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 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 3, 15, 16, 17, 22, 23, 147, 148, 149 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 102 -Paragraph 9 -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 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3461-108585 + Details
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