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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non Traditional Mortgage Performance by Credit Score (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 5,898,405 | $ 5,951,885
NTM Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 437,113 | $ 600,656
Consumer | NTM Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 344 | 461
Total loans | $ 437,113 | $ 600,656
Increase (decrease) in loans receivable | $ (163,500) |
Increase (decrease) in loans receivable (percent) | (27.20%) |
Consumer | NTM Loans | First lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 339 | 454
Total loans | $ 435,515 | $ 598,357
Consumer | NTM Loans | Green Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 33,200 | $ 52,300
Consumer | NTM Loans | Green Loans | First lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Count | loan | 48 | 69
Total loans | $ 31,587 | $ 49,959
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] |  |
Count | loan | 48 | 48
Total loans | $ 31,587 | $ 31,587
Percentage to total loans and leases (percent) | 100.00% | 100.00%
Increase (decrease) in count of loans receivable | loan | 0 |
Increase (decrease) in loans receivable | $ 0 |
Increase (decrease) in loans receivable (percent) | 0.00% |
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] |  |
Count | loan | 11 | 12
Total loans | $ 5,773 | $ 3,130
Percentage to total loans and leases (percent) | 18.30% | 9.90%
Increase (decrease) in count of loans receivable | loan | (1) |
Increase (decrease) in loans receivable | $ 2,643 |
Increase (decrease) in loans receivable (percent) | 84.40% |
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] |  |
Count | loan | 24 | 24
Total loans | $ 16,472 | $ 17,408
Percentage to total loans and leases (percent) | 52.10% | 55.10%
Increase (decrease) in count of loans receivable | loan | 0 |
Increase (decrease) in loans receivable | $ (936) |
Increase (decrease) in loans receivable (percent) | (5.40%) |
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] |  |
Count | loan | 9 | 6
Total loans | $ 7,717 | $ 7,959
Percentage to total loans and leases (percent) | 24.40% | 25.20%
Increase (decrease) in count of loans receivable | loan | 3 |
Increase (decrease) in loans receivable | $ (242) |
Increase (decrease) in loans receivable (percent) | (3.00%) |
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] |  |
Count | loan | 2 | 4
Total loans | $ 1,097 | $ 2,562
Percentage to total loans and leases (percent) | 3.50% | 8.10%
Increase (decrease) in count of loans receivable | loan | (2) |
Increase (decrease) in loans receivable | $ (1,465) |
Increase (decrease) in loans receivable (percent) | (57.20%) |
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] |  |
Count | loan | 2 | 2
Total loans | $ 528 | $ 528
Percentage to total loans and leases (percent) | 1.70% | 1.70%
Increase (decrease) in count of loans receivable | loan | 0 |
Increase (decrease) in loans receivable | $ 0 |
Increase (decrease) in loans receivable (percent) | 0.00% |

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