Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
FAIR VALUE MEASUREMENT - Schedule of Inputs Used in Valuing Residential Mortgage Loans (Details) - Fair Value, Measurements, Nonrecurring
$ in Thousands
Jun. 30, 2018
USD ($)
Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.049
Weighted Average Life (Years)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, term 4 years 9 months 18 days
Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.071
Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.037
Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.322
Performing Loans | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.046
Performing Loans | Weighted Average Life (Years)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, term 5 years 1 month 14 days
Performing Loans | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.079
Performing Loans | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.039
Performing Loans | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.327
Non-Performing Loans | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.066
Non-Performing Loans | Weighted Average Life (Years)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, term 3 years 2 months 8 days
Non-Performing Loans | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.030
Non-Performing Loans | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.029
Non-Performing Loans | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, measurement input 0.300
Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value $ 271,131
Fair Value | Performing Loans  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value 225,840
Fair Value | Non-Performing Loans  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value $ 45,291