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Schedule of Derivative Activity (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Interest Rate Swap [Member]    
Derivative [Line Items]    
Financial derivative average monthly notional $ 554,067 $ 651,793
TBA securities [Member]    
Derivative [Line Items]    
Financial derivative average monthly notional 347,191 474,555
Futures [Member]    
Derivative [Line Items]    
Financial derivative average monthly notional 70,250 114,277
Options Held [Member]    
Derivative [Line Items]    
Financial derivative average monthly notional $ 0 $ 1,492