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Net Gains (Schedule of Net Gains) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Net Gains [Abstract]    
Available-for-sale securities: Realized gains $ 52 $ 688
Available-for-sale Securities: Realized losses (101) (248)
Gain on sale of consumer loans 75 95
Loss on disposal of fixed assets 3 (9)
Net gains - other 29 526
Total Gains Loss $ 29 $ 526