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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgage Performance by Credit Score (Detail) $ in Thousands |  |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) Loan | Dec. 31, 2014 USD ($) 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 | $ 3,949,122 | $ 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 | 350,575 | $ 720,321 | $ 350,575 |
Amount change |  |  | $ 369,700 |  |
Percent Change |  |  | 105.50% |  |
Non-Traditional Mortgages (NTM) | First lien |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan |  |  | 668 | 387 |
Amount | 715,435 | 345,483 | $ 715,435 | $ 345,483 |
Non-Traditional Mortgages (NTM) | Green Loans |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Amount | $ 122,700 | 128,200 | $ 122,700 | $ 128,200 |
Non-Traditional Mortgages (NTM) | Green Loans | First lien |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 143 |  | 143 | 148 |
Amount | $ 117,881 | $ 123,177 | $ 117,881 | $ 123,177 |
Count Change | Loan | 0 |  |  |  |
Amount change | $ 0 |  |  |  |
Percent Change | 0.00% |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 100.00% |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | Greater than 800 |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 24 | 28 |  |  |
Amount | $ 15,720 | $ 19,274 | 15,720 | 19,274 |
Count Change | Loan | (4) |  |  |  |
Amount change | $ (3,554) |  |  |  |
Percent Change | (3.10%) |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | Greater than 800 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 13.30% | 16.40% |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | 700-799 |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 74 | 69 |  |  |
Amount | $ 59,367 | $ 49,543 | 59,367 | 49,543 |
Count Change | Loan | 5 |  |  |  |
Amount change | $ 9,824 |  |  |  |
Percent Change | 8.50% |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | 700-799 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 50.40% | 41.90% |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | 600-699 |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 26 | 28 |  |  |
Amount | $ 18,189 | $ 30,408 | 18,189 | 30,408 |
Count Change | Loan | (2) |  |  |  |
Amount change | $ (12,219) |  |  |  |
Percent Change | (10.40%) |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | 600-699 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 15.40% | 25.80% |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | Less than 600 |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 7 | 8 |  |  |
Amount | $ 7,848 | $ 11,867 | 7,848 | 11,867 |
Count Change | Loan | (1) |  |  |  |
Amount change | $ (4,019) |  |  |  |
Percent Change | (3.40%) |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | Less than 600 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 6.70% | 10.10% |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | No FICO |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Count | Loan | 12 | 10 |  |  |
Amount | $ 16,757 | $ 6,789 | $ 16,757 | $ 6,789 |
Count Change | Loan | 2 |  |  |  |
Amount change | $ 9,968 |  |  |  |
Percent Change | 8.40% |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans | First lien | No FICO | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Concentration risk percentage | 14.20% | 5.80% |  |  |

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