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VARIABLE INTEREST ENTITIES - Geographic Concentrations of Credit Risk Exceeding 5% of Total Loan Unpaid Principal Balances (Details) - Consolidated VIEs $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($)
Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | $ 3,287,085
Commercial Trusts | California |
Concentration Risk [Line Items] |
Principal balance | 1,270,650
Commercial Trusts | Texas |
Concentration Risk [Line Items] |
Principal balance | 478,048
Commercial Trusts | New York |
Concentration Risk [Line Items] |
Principal balance | 353,800
Commercial Trusts | Other |
Concentration Risk [Line Items] |
Principal balance | $ 1,184,587
Commercial Trusts | Securitized Loans | Geographic Concentration Risk |
Concentration Risk [Line Items] |
% of balance | 100.00%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | California |
Concentration Risk [Line Items] |
% of balance | 38.70%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | Texas |
Concentration Risk [Line Items] |
% of balance | 14.50%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | New York |
Concentration Risk [Line Items] |
% of balance | 10.80%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | Other |
Concentration Risk [Line Items] |
% of balance | 36.00%
Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | $ 75,382
Residential Trusts | California |
Concentration Risk [Line Items] |
Principal balance | 34,578
Residential Trusts | Texas |
Concentration Risk [Line Items] |
Principal balance | 10,116
Residential Trusts | Illinois |
Concentration Risk [Line Items] |
Principal balance | 7,055
Residential Trusts | Washington |
Concentration Risk [Line Items] |
Principal balance | 3,880
Residential Trusts | Other |
Concentration Risk [Line Items] |
Principal balance | $ 19,753
Residential Trusts | Securitized Loans | Geographic Concentration Risk |
Concentration Risk [Line Items] |
% of balance | 100.00%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | California |
Concentration Risk [Line Items] |
% of balance | 45.90%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Texas |
Concentration Risk [Line Items] |
% of balance | 13.40%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Illinois |
Concentration Risk [Line Items] |
% of balance | 9.40%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Washington |
Concentration Risk [Line Items] |
% of balance | 5.10%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Other |
Concentration Risk [Line Items] |
% of balance | 26.20%

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