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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 | 3 Months Ended
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Mar. 31, 2020 USD ($)
Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | $ 3,286,245
Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | 68,043
California |
Concentration Risk [Line Items] |
Principal Balance | 1,270,649
California | Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | 30,536
Texas | Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | 479,164
Texas | Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | 9,618
New York | Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | 370,697
Illinois | Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | 7,009
Florida | Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | 196,495
Washington | Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | 3,847
Other | Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | 969,240
Other | Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | $ 17,033
Securitized Loans | Geographic Concentration Risk | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 100.00%
Securitized Loans | Geographic Concentration Risk | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 100.00%
Securitized Loans | Geographic Concentration Risk | California | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 38.70%
Securitized Loans | Geographic Concentration Risk | California | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 44.90%
Securitized Loans | Geographic Concentration Risk | Texas | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 14.60%
Securitized Loans | Geographic Concentration Risk | Texas | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 14.10%
Securitized Loans | Geographic Concentration Risk | New York | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 11.30%
Securitized Loans | Geographic Concentration Risk | Illinois | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 10.30%
Securitized Loans | Geographic Concentration Risk | Florida | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 6.00%
Securitized Loans | Geographic Concentration Risk | Washington | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 5.70%
Securitized Loans | Geographic Concentration Risk | Other | Commercial Trusts |
Concentration Risk [Line Items] |
% of Balance | 29.40%
Securitized Loans | Geographic Concentration Risk | Other | Residential Trusts |
Concentration Risk [Line Items] |
% of Balance | 25.00%

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