Fair Value - Schedule of Significant Unobservable Inputs Used in Fair Value Measurement of Real Estate Owned (Details) - Loss Severity [Member] - Non-Recurring Measurement Basis [Member]	Dec. 31, 2018	Feb. 09, 2018	Dec. 31, 2017
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real Estate Owned, Net	0	0	0
Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real Estate Owned, Net	0.4970	0.6866	0.7876
Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real Estate Owned, Net	0.0499	0.0754	0.0616