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Net Gains (Summary of Net Gain/ (loss) Activity) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Net Gains [Abstract]        
Realized gains $ 1 $ 6 $ 74 $ 151
Realized losses   (16) (73) (35)
Gains on sale of consumer loans 42 19 87 74
Losses on disposal of fixed assets (3)   (4)  
Net gains $ 40 $ 9 $ 84 $ 190