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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non Traditional Mortgage Loans Additional Information (Details) $ in Thousands | Mar. 31, 2020 USD ($) portfolio_product | Dec. 31, 2019 USD ($)
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 5,667,464 | $ 5,951,885
NTM Loans | Interest-only |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of interest-only products | portfolio_product | 3 |
Consumer | NTM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 560,058 | 600,656
Non-performing loans | Consumer | NTM Loans | Green Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 4,700 | 1,500
Green Loans (HELOC) - first liens | Consumer | NTM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 558,164 | 598,357
Green Loans (HELOC) - first liens | Consumer | NTM Loans | Green Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 45,913 | 49,959
Green Loans (HELOC) - first liens | Consumer | NTM Loans | Interest Only Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 509,892 | 545,371
Green Loans (HELOC) - first liens | Non-performing loans | Consumer | NTM Loans | Interest Only Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 10,900 | $ 11,500

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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=118952595&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=118936363&loc=d3e5074-111524 + Details
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