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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, 2020 USD ($)
Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | $ 3,241,472
Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | 39,459
California | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 1,051,276
California | Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | 18,692
Illinois | Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | 5,356
Texas | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 459,256
Texas | Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | 4,972
New York | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 369,691
Florida | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 196,865
Washington | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 182,000
Arizona | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 171,102
Massachusetts | Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | 2,265
Other | Commercial Trusts |
Concentration Risk [Line Items] |
Principal balance | 811,282
Other | Residential Trusts |
Concentration Risk [Line Items] |
Principal balance | $ 8,174
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 | 32.40%
Securitized Loans | Geographic Concentration Risk | California | Residential Trusts |
Concentration Risk [Line Items] |
% of balance | 47.40%
Securitized Loans | Geographic Concentration Risk | Illinois | Residential Trusts |
Concentration Risk [Line Items] |
% of balance | 13.60%
Securitized Loans | Geographic Concentration Risk | Texas | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 14.20%
Securitized Loans | Geographic Concentration Risk | Texas | Residential Trusts |
Concentration Risk [Line Items] |
% of balance | 12.60%
Securitized Loans | Geographic Concentration Risk | New York | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 11.40%
Securitized Loans | Geographic Concentration Risk | Florida | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 6.10%
Securitized Loans | Geographic Concentration Risk | Washington | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 5.60%
Securitized Loans | Geographic Concentration Risk | Arizona | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 5.30%
Securitized Loans | Geographic Concentration Risk | Massachusetts | Residential Trusts |
Concentration Risk [Line Items] |
% of balance | 5.70%
Securitized Loans | Geographic Concentration Risk | Other | Commercial Trusts |
Concentration Risk [Line Items] |
% of balance | 25.00%
Securitized Loans | Geographic Concentration Risk | Other | Residential Trusts |
Concentration Risk [Line Items] |
% of balance | 20.70%

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