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Investment in Securities (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
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 $ 19,629 $ 1,101  
Gross realized gains $ 1,069 $ 11