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Securities Securities (Realized Gains and Losses on Sale of Securities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale Securities, Gross Realized Gains $ 58 $ 22
Available-for-sale Securities, Gross Realized Losses (104) (26)
Marketable Securities, Realized Gain (Loss) (46) (4)
Proceeds from sale of available-for-sale securities $ 22,452 $ 6,207