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Derivative Financial Instruments - Schedule of Derivatives as Reflected on Balance Sheet (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]    
Fair value of asset derivatives $ 57 $ 1,818
Fair value of asset derivatives    
Derivatives, Fair Value [Line Items]    
Fair value of asset derivatives 57 1,818
Fair value of asset derivatives | Interest rate swap options - floor income hedges    
Derivatives, Fair Value [Line Items]    
Fair value of asset derivatives 0 1,465
Fair value of asset derivatives | Interest rate caps    
Derivatives, Fair Value [Line Items]    
Fair value of asset derivatives 57 353
Fair value of liability derivatives    
Derivatives, Fair Value [Line Items]    
Fair value of liability derivatives 0 0
Fair value of liability derivatives | Interest rate swap options - floor income hedges    
Derivatives, Fair Value [Line Items]    
Fair value of liability derivatives 0 0
Fair value of liability derivatives | Interest rate caps    
Derivatives, Fair Value [Line Items]    
Fair value of liability derivatives $ 0 $ 0