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Investment Securities (Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Debt Securities) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Securities Financing Transactions Disclosures [Abstract]        
Realized gains $ 150 $ 64 $ 405 $ 133
Realized losses   (18) (12) (63)
Net gains $ 150 $ 46 $ 393 $ 70