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9. Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2016
Related Party Transactions [Abstract]  
Summary of activity for related party loans
(Dollars in thousands)            
    2016     2015  
Beginning balance   $ 5,674       6,055  
New loans     6,048       7,857  
Repayments     (7,219 )     (8,238 )
Ending balance   $ 4,503       5,674