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Summary of Significant Accounting Policies (Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]      
Intangible Assets, Net (Excluding Goodwill) $ 612 $ 285  
Finite-Lived Intangible Assets, Accumulated Amortization $ 732 610  
Finite-Lived Intangible Assets, Amortization Method sum-of-the-years digits method    
Finite-Lived Intangible Asset, Useful Life 10 years    
Amortization of Intangibles $ 122 $ 105 $ 121
2017 150    
2018 126    
2019 101    
2020 77    
2021 52    
Thereafter 106    
Amortization Expense for the Core Deposit Intangible, Total $ 612