Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Schedule of Inputs Used in Valuing Assets and Liabilities At Fair Value (Details)

v3.19.1
FAIR VALUE MEASUREMENT - Schedule of Inputs Used in Valuing Assets and Liabilities At Fair Value (Details) - Fair Value, Measurements, Nonrecurring
$ in Thousands
Mar. 31, 2019
USD ($)
Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.048
Weighted Average Life (Years)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, term 3 years 8 months 12 days
Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.083
Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.024
Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.322
Performing Loans | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.043
Performing Loans | Weighted Average Life (Years)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Residential mortgage loans held for sale, term 4 years
Performing Loans | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.125
Performing Loans | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.021
Performing Loans | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.340
Non-Performing Loans | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.055
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 12 days
Non-Performing Loans | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.029
Non-Performing Loans | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.028
Non-Performing Loans | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.300
Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value $ 838,384
Fair Value | Performing Loans  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value 466,201
Fair Value | Non-Performing Loans  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Fair Value $ 372,183