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Net Gains (Summary of Net Gain/ (loss) Activity) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Net Gains [Abstract]        
Realized gains $ 73 $ 145 $ 73 $ 145
Realized losses (67) (10) (73) (19)
Gains on sale of consumer loans 25 12 45 55
Losses on disposal of fixed assets (1)   (1)  
Net gains $ 30 $ 147 $ 44 $ 181