v3.20.1
Investment in Securities (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax $ 113,243   $ 9,638
Debt Securities, Available-for-sale, Allowance for Credit Loss 40,700    
Catch-up premium amortization adjustment (1,100) $ (500)  
OTTI charge on securities   $ 1,300  
Long      
Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax $ 113,098   $ 9,007