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Securities - Schedule Of Realized Gains (Losses) For Marketable Securities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Available for sale:    
Realized gains $ 89 $ 302
Realized losses (61) (1)
Total securities available for sale 28 301
Held to maturity:    
Realized gains 38 123
Realized losses (4) 0
Total securities held to maturity 34 123
Net gains on sales of securities $ 62 $ 424