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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgage Performance Loan to Value Ratio (Detail) $ in Thousands |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) Loan | Jun. 30, 2015 USD ($) Loan | Dec. 31, 2014 USD ($) Loan | Jun. 30, 2014 USD ($)
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Amount | $ 4,473,095 | $ 4,473,095 | $ 3,949,122 | $ 2,602,213
Non-Traditional Mortgages (NTM) |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 686 | 407 |
Amount | 720,321 | $ 720,321 | $ 350,575 |
Non-Traditional Mortgages (NTM) | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Amount | 122,700 | 122,700 | 128,200 |
Non-Traditional Mortgages (NTM) | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Amount | 585,600 | 585,600 | 209,300 |
Non-Traditional Mortgages (NTM) | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Amount | 12,100 | $ 12,100 | $ 13,100 |
Non-Traditional Mortgages (NTM) | First lien |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 668 | 387 |
Amount | $ 715,435 | $ 715,435 | $ 345,483 |
Non-Traditional Mortgages (NTM) | First lien | Loan Portfolio Concentration Risk | Nontraditional First Lien Mortgage Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 100.00% | 100.00% |
Non-Traditional Mortgages (NTM) | First lien | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan | 143 | 143 | 148 |
Amount | $ 117,881 | $ 117,881 | $ 123,177 |
Non-Traditional Mortgages (NTM) | First lien | Green Loans | Loan Portfolio Concentration Risk | Green Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 100.00% | 100.00% |
Non-Traditional Mortgages (NTM) | First lien | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 494 | 207 |
Amount | 585,437 | $ 585,437 | $ 209,207 |
Non-Traditional Mortgages (NTM) | First lien | Interest Only Loans | Loan Portfolio Concentration Risk | Interest Only Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 100.00% | 100.00% |
Non-Traditional Mortgages (NTM) | First lien | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 31 | 32 |
Amount | 12,117 | $ 12,117 | $ 13,099 |
Non-Traditional Mortgages (NTM) | First lien | Negative amortization | Loan Portfolio Concentration Risk | Negative Amortization Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 100.00% | 100.00% |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 218 | 152 |
Amount | 238,046 | $ 238,046 | $ 158,133 |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Loan Portfolio Concentration Risk | Nontraditional First Lien Mortgage Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 33.20% | 45.80% |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 82 | 77 |
Amount | 58,054 | $ 58,054 | $ 58,856 |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Green Loans | Loan Portfolio Concentration Risk | Green Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 49.20% | 47.80% |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 120 | 60 |
Amount | 173,343 | $ 173,343 | $ 93,254 |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Interest Only Loans | Loan Portfolio Concentration Risk | Interest Only Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 29.60% | 44.70% |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 16 | 15 |
Amount | 6,649 | $ 6,649 | $ 6,023 |
Non-Traditional Mortgages (NTM) | First lien | Less than 61 | Negative amortization | Loan Portfolio Concentration Risk | Negative Amortization Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 54.90% | 46.00% |
Non-Traditional Mortgages (NTM) | First lien | 61-80 |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 324 | 111 |
Amount | 423,977 | $ 423,977 | $ 133,550 |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Loan Portfolio Concentration Risk | Nontraditional First Lien Mortgage Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 59.30% | 38.60% |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 36 | 45 |
Amount | 42,145 | $ 42,145 | $ 46,177 |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Green Loans | Loan Portfolio Concentration Risk | Green Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 35.80% | 37.50% |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 277 | 54 |
Amount | 377,324 | $ 377,324 | $ 81,472 |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Interest Only Loans | Loan Portfolio Concentration Risk | Interest Only Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 64.50% | 38.90% |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 11 | 12 |
Amount | 4,508 | $ 4,508 | $ 5,901 |
Non-Traditional Mortgages (NTM) | First lien | 61-80 | Negative amortization | Loan Portfolio Concentration Risk | Negative Amortization Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 37.20% | 45.00% |
Non-Traditional Mortgages (NTM) | First lien | 81-100 |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 60 | 55 |
Amount | 29,187 | $ 29,187 | $ 27,554 |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Loan Portfolio Concentration Risk | Nontraditional First Lien Mortgage Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 4.10% | 8.00% |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 19 | 18 |
Amount | 12,519 | $ 12,519 | $ 11,846 |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Green Loans | Loan Portfolio Concentration Risk | Green Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 10.60% | 9.60% |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 38 | 33 |
Amount | 16,094 | $ 16,094 | $ 14,927 |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Interest Only Loans | Loan Portfolio Concentration Risk | Interest Only Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 2.70% | 7.10% |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 3 | 4 |
Amount | 574 | $ 574 | $ 781 |
Non-Traditional Mortgages (NTM) | First lien | 81-100 | Negative amortization | Loan Portfolio Concentration Risk | Negative Amortization Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 4.70% | 6.00% |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 66 | 69 |
Amount | 24,225 | $ 24,225 | $ 26,246 |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Loan Portfolio Concentration Risk | Nontraditional First Lien Mortgage Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 3.40% | 7.60% |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Green Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 6 | 8 |
Amount | 5,163 | $ 5,163 | $ 6,298 |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Green Loans | Loan Portfolio Concentration Risk | Green Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 4.40% | 5.10% |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Interest Only Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 59 | 60 |
Amount | 18,676 | $ 18,676 | $ 19,554 |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Interest Only Loans | Loan Portfolio Concentration Risk | Interest Only Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 3.20% | 9.30% |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Negative amortization |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Count | Loan |  | 1 | 1 |
Amount | $ 386 | $ 386 | $ 394 |
Non-Traditional Mortgages (NTM) | First lien | Greater than 100 | Negative amortization | Loan Portfolio Concentration Risk | Negative Amortization Loans Portfolio |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Concentration risk percentage |  | 3.20% | 3.00% |

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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=28367877&loc=d3e4428-111522 + Details
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