Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MORTGAGE SERVICING RIGHTS FINANCING RECEIVABLE - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans (Details)

v3.7.0.1
INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MORTGAGE SERVICING RIGHTS FINANCING RECEIVABLE - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans (Details) - Mortgage Servicing Rights [Member] - Mortgage Loans [Member]
Jun. 30, 2017
Dec. 31, 2016
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 100.00% 100.00%
California [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 20.70% 20.50%
Texas [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 6.00% 6.30%
New York [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 5.90% 2.80%
Florida [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 5.80% 7.30%
New Jersey [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.70% 4.50%
Illinois [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.30% 4.10%
Massachusetts [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.00% 4.10%
Michigan [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.90% 3.10%
Pennsylvania [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.10% 2.90%
Georgia [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.00% 2.70%
Other U.S. [Member]    
Schedule of MSRs [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 38.60% 41.70%