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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgages Portfolio (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Loan | Dec. 31, 2017 USD ($) Loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases (1) | $ 7,700,873 | $ 6,659,407
Loan Portfolio Concentration Risk | Loan Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 100.00% | 100.00%
NTM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases (1) | $ 826,731 | $ 806,933
NTM Loans | Loan Portfolio Concentration Risk | Loan Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 10.70% | 12.10%
Consumer | NTM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 628 | 592
Total loans and leases (1) | $ 826,731 | $ 806,933
Consumer | NTM Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 100.00% | 100.00%
Consumer | NTM Loans | Loan Portfolio Concentration Risk | Loan Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 10.70% | 12.10%
Consumer | NTM Loans | First lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 618 | 580
Total loans and leases (1) | $ 824,318 | $ 803,355
Consumer | NTM Loans | First lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 99.70% | 99.60%
Consumer | NTM Loans | Second lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 10 | 12
Total loans and leases (1) | $ 2,413 | $ 3,578
Consumer | NTM Loans | Second lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 0.30% | 0.40%
Consumer | NTM Loans | Green Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases (1) | $ 70,100 | $ 85,800
Consumer | NTM Loans | Green Loans | First lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 88 | 101
Total loans and leases (1) | $ 67,729 | $ 82,197
Consumer | NTM Loans | Green Loans | First lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 8.20% | 10.20%
Consumer | NTM Loans | Green Loans | Second lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 10 | 12
Total loans and leases (1) | $ 2,413 | $ 3,578
Consumer | NTM Loans | Green Loans | Second lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 0.30% | 0.40%
Consumer | NTM Loans | Interest Only Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases (1) | $ 753,100 | $ 717,500
Consumer | NTM Loans | Interest Only Loans | First lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 519 | 468
Total loans and leases (1) | $ 753,061 | $ 717,484
Consumer | NTM Loans | Interest Only Loans | First lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 91.10% | 88.90%
Consumer | NTM Loans | Negative amortization |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases (1) | $ 3,500 | $ 3,700
Consumer | NTM Loans | Negative amortization | First lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Count | Loan | 11 | 11
Total loans and leases (1) | $ 3,528 | $ 3,674
Consumer | NTM Loans | Negative amortization | First lien | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage to total loans and leases | 0.40% | 0.50%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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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