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LOANS AND ALLOWANCE FOR LOAN LOSSES - Non Traditional Mortgage Performance by Credit Score (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) loan | Dec. 31, 2018 USD ($) loan
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 5,951,885 | $ 7,700,873
NTM Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 600,656 | $ 826,731
Consumer | NTM Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 461 | 628
Total loans | $ 600,656 | $ 826,731
Increase (decrease) in loans receivable | $ (226,100) |
Increase (decrease) in loans receivable (percent) | (27.30%) |
Consumer | NTM Loans | First lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 454 | 618
Total loans | $ 598,357 | $ 824,318
Consumer | NTM Loans | Green Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 52,300 | $ 70,100
Consumer | NTM Loans | Green Loans | First lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 69 | 88
Total loans | $ 49,959 | $ 67,729
Increase (decrease) in count of loans receivable | loan | (19) |
Increase (decrease) in loans receivable | $ (17,770) |
Consumer | NTM Loans | Green Loans | First lien | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 100.00% | 100.00%
Increase (decrease) in loans receivable (percent) | (26.20%) |
Consumer | NTM Loans | Green Loans | First lien | Greater than 800 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 13 | 16
Total loans | $ 3,509 | $ 10,617
Increase (decrease) in count of loans receivable | loan | (3) |
Increase (decrease) in loans receivable | $ (7,108) |
Consumer | NTM Loans | Green Loans | First lien | Greater than 800 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 7.00% | 15.70%
Increase (decrease) in loans receivable (percent) | (66.90%) |
Consumer | NTM Loans | Green Loans | First lien | 700-799 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 38 | 50
Total loans | $ 27,011 | $ 34,888
Increase (decrease) in count of loans receivable | loan | (12) |
Increase (decrease) in loans receivable | $ (7,877) |
Consumer | NTM Loans | Green Loans | First lien | 700-799 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 54.10% | 51.50%
Increase (decrease) in loans receivable (percent) | (22.60%) |
Consumer | NTM Loans | Green Loans | First lien | 600-699 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 10 | 16
Total loans | $ 12,400 | $ 14,098
Increase (decrease) in count of loans receivable | loan | (6) |
Increase (decrease) in loans receivable | $ (1,698) |
Consumer | NTM Loans | Green Loans | First lien | 600-699 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 24.80% | 20.80%
Increase (decrease) in loans receivable (percent) | (12.00%) |
Consumer | NTM Loans | Green Loans | First lien | Less than 600 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 5 | 3
Total loans | $ 3,286 | $ 4,347
Increase (decrease) in count of loans receivable | loan | 2 |
Increase (decrease) in loans receivable | $ (1,061) |
Consumer | NTM Loans | Green Loans | First lien | Less than 600 | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 6.60% | 6.40%
Increase (decrease) in loans receivable (percent) | (24.40%) |
Consumer | NTM Loans | Green Loans | First lien | No FICO score |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 3 | 3
Total loans | $ 3,753 | $ 3,779
Increase (decrease) in count of loans receivable | loan | 0 |
Increase (decrease) in loans receivable | $ (26) |
Consumer | NTM Loans | Green Loans | First lien | No FICO score | Loan Portfolio Concentration Risk | Non-Traditional Single Family Residential Mortgage Green Loans First Lien Portfolio |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage to total loans and leases (percent) | 7.50% | 5.60%
Increase (decrease) in loans receivable (percent) | (0.70%) |

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