Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Schedule of Inputs Used in Valuing Residential Mortgage Loans (Details)

v3.7.0.1
FAIR VALUE MEASUREMENT - Schedule of Inputs Used in Valuing Residential Mortgage Loans (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Valuation and Loss Provision/ (Reversal) In Current Year $ 20,771 $ 16,825 $ 38,681 $ 23,570
Weighted Average Life (Years)     1 year 3 months 18 days  
Reverse Mortgage Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Interest in reverse mortgage loans     70.00%  
Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Weighted Average Life (Years)     5 years 5 months 30 days  
Residential Mortgage [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     6.70%  
Weighted Average Life (Years)     4 years 4 months 24 days  
Loss Severity     43.70%  
Residential Mortgage [Member] | Reverse Mortgage Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     7.00%  
Weighted Average Life (Years)     4 years 7 months 6 days  
Loss Severity     8.20%  
Residential Mortgage [Member] | Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     7.70%  
Weighted Average Life (Years)     5 years 2 months 12 days  
Prepayment Rate     8.30%  
CDR     2.10%  
Loss Severity     55.10%  
Residential Mortgage [Member] | Non-Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     6.00%  
Weighted Average Life (Years)     3 years 9 months 18 days  
Prepayment Rate     2.80%  
CDR     3.00%  
Loss Severity     36.00%  
Residential Mortgage [Member] | Carrying Value [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Carrying Value 1,529,879   $ 1,529,879  
Residential Mortgage [Member] | Carrying Value [Member] | Reverse Mortgage Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Carrying Value 10,709   10,709  
Residential Mortgage [Member] | Carrying Value [Member] | Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Carrying Value 630,037   630,037  
Residential Mortgage [Member] | Carrying Value [Member] | Non-Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Carrying Value 889,133   889,133  
Residential Mortgage [Member] | Fair Value [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 1,568,961   1,568,961  
Residential Mortgage [Member] | Fair Value [Member] | Reverse Mortgage Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 11,371   11,371  
Residential Mortgage [Member] | Fair Value [Member] | Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 635,456   635,456  
Residential Mortgage [Member] | Fair Value [Member] | Non-Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 922,134   $ 922,134  
Consumer Loan [Member] | Consumer Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     8.90%  
Weighted Average Life (Years)     3 years 7 months 6 days  
Prepayment Rate     22.50%  
CDR     6.30%  
Loss Severity     87.80%  
Consumer Loan [Member] | Carrying Value [Member] | Consumer Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Carrying Value 1,569,388   $ 1,569,388  
Consumer Loan [Member] | Fair Value [Member] | Consumer Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 1,584,236   $ 1,584,236  
Fair Value, Measurements, Nonrecurring [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     4.30%  
Weighted Average Life (Years)     4 years 8 months 12 days  
Prepayment Rate     8.90%  
CDR     1.90%  
Loss Severity     37.20%  
Fair Value, Measurements, Nonrecurring [Member] | Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     3.80%  
Weighted Average Life (Years)     5 years  
Prepayment Rate     10.30%  
CDR     1.60%  
Loss Severity     39.00%  
Fair Value, Measurements, Nonrecurring [Member] | Non-Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Discount Rate     6.60%  
Weighted Average Life (Years)     3 years 2 months 12 days  
Prepayment Rate     3.00%  
CDR     3.00%  
Loss Severity     30.00%  
Fair Value, Measurements, Nonrecurring [Member] | Fair Value [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 229,014   $ 229,014  
Fair Value, Measurements, Nonrecurring [Member] | Fair Value [Member] | Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value 184,148   184,148  
Fair Value, Measurements, Nonrecurring [Member] | Fair Value [Member] | Non-Performing Loans [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value $ 44,866   $ 44,866