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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 | 9 Months Ended
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Sep. 30, 2019 USD ($)
Commercial Trusts |
Concentration Risk [Line Items] |
Principal Balance | $ 2,356,097
Commercial Trusts | Texas |
Concentration Risk [Line Items] |
Principal Balance | 476,312
Commercial Trusts | California |
Concentration Risk [Line Items] |
Principal Balance | 459,310
Commercial Trusts | New York |
Concentration Risk [Line Items] |
Principal Balance | 353,800
Commercial Trusts | Florida |
Concentration Risk [Line Items] |
Principal Balance | 163,995
Commercial Trusts | North Carolina |
Concentration Risk [Line Items] |
Principal Balance | 123,026
Commercial Trusts | Other |
Concentration Risk [Line Items] |
Principal Balance | $ 779,654
Commercial Trusts | Securitized Loans | Geographic Concentration Risk |
Concentration Risk [Line Items] |
% of Balance | 100.00%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | Texas |
Concentration Risk [Line Items] |
% of Balance | 20.20%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | California |
Concentration Risk [Line Items] |
% of Balance | 19.50%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | New York |
Concentration Risk [Line Items] |
% of Balance | 15.00%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | Florida |
Concentration Risk [Line Items] |
% of Balance | 7.00%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | North Carolina |
Concentration Risk [Line Items] |
% of Balance | 5.20%
Commercial Trusts | Securitized Loans | Geographic Concentration Risk | Other |
Concentration Risk [Line Items] |
% of Balance | 33.10%
Residential Trusts |
Concentration Risk [Line Items] |
Principal Balance | $ 84,356
Residential Trusts | Texas |
Concentration Risk [Line Items] |
Principal Balance | 11,202
Residential Trusts | California |
Concentration Risk [Line Items] |
Principal Balance | 37,268
Residential Trusts | Illinois |
Concentration Risk [Line Items] |
Principal Balance | 7,102
Residential Trusts | Washington |
Concentration Risk [Line Items] |
Principal Balance | 5,895
Residential Trusts | Other |
Concentration Risk [Line Items] |
Principal Balance | $ 22,889
Residential Trusts | Securitized Loans | Geographic Concentration Risk |
Concentration Risk [Line Items] |
% of Balance | 100.00%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Texas |
Concentration Risk [Line Items] |
% of Balance | 13.30%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | California |
Concentration Risk [Line Items] |
% of Balance | 44.20%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Illinois |
Concentration Risk [Line Items] |
% of Balance | 8.40%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Washington |
Concentration Risk [Line Items] |
% of Balance | 7.00%
Residential Trusts | Securitized Loans | Geographic Concentration Risk | Other |
Concentration Risk [Line Items] |
% of Balance | 27.10%

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