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Investment in Securities (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]          
Number of securities that had an unrealized loss         9
Number of securities that had an unrealized loss, greater than 12 months         7
Percentage of total securities         3.00%
Proceeds from sales of securities available-for-sale $ 0 $ 3,547 $ 19,629 $ 4,648  
Gross realized gains   $ 8 $ 1,069 $ 19