Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS, EQUITY METHOD INVESTEES - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans of the Excess MSR Investments made through Equity Method Investees (Details)

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INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS, EQUITY METHOD INVESTEES - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans of the Excess MSR Investments made through Equity Method Investees (Details) - Mortgage Loans [Member] - Excess MSRs Investees [Member]
Mar. 31, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 100.00% 100.00%
California [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 12.80% 12.90%
Florida [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 7.30% 7.40%
Texas [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 6.10% 6.10%
New York [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 5.90% 5.80%
Georgia [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 5.70% 5.70%
New Jersey [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.30% 4.30%
Illinois [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.00% 4.00%
Maryland [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.20% 3.20%
Virginia [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.20% 3.20%
Pennsylvania [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.10% 3.10%
Other U.S. [Member]    
Schedule of Equity Method Investments [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 44.40% 44.30%