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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgages Portfolio (Detail) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) Loan | Dec. 31, 2016 USD ($) Loan | Sep. 30, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 6,226,897 | $ 6,034,752 | $ 6,568,791
Non-Traditional Mortgages (NTM) |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 793,946 | $ 885,148 |
Consumer | Non-Traditional Mortgages (NTM) |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 579 | 663 |
Loans | $ 793,946 | $ 885,148 |
Consumer | Non-Traditional Mortgages (NTM) | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 100.00% | 100.00% |
Consumer | Non-Traditional Mortgages (NTM) | Loan Portfolio Concentration Risk | Loan Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 12.80% | 14.70% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 85,800 | $ 91,000 |
Consumer | Non-Traditional Mortgages (NTM) | Interest Only Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 704,400 | 784,400 |
Consumer | Non-Traditional Mortgages (NTM) | Negative amortization |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 3,700 | $ 9,800 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 567 | 651 |
Loans | $ 790,388 | $ 881,589 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 99.60% | 99.60% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Green Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 101 | 107 |
Loans | $ 82,289 | $ 87,469 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Green Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 10.40% | 9.90% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Interest Only Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 455 | 522 |
Loans | $ 704,386 | $ 784,364 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Interest Only Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 88.70% | 88.60% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Negative amortization |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 11 | 22 |
Loans | $ 3,713 | $ 9,756 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens | Negative amortization | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 0.50% | 1.10% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 12 | 12 |
Loans | $ 3,558 | $ 3,559 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 0.40% | 0.40% |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens | Green Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Count | Loan | 12 | 12 |
Loans | $ 3,558 | $ 3,559 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens | Green Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Concentration risk percentage | 0.40% | 0.40% |

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- Definition Amount before allowance and after 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=82891408&loc=d3e4428-111522 Reference 2: 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=84173941&loc=d3e5074-111524 + Details
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