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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
May 05, 2016
Jan. 02, 2016
Jul. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Amortization expense of intangible assets       $ 1,211 $ 722 $ 777
Goodwill acquired $ 5,553 $ 1,693        
Other amortizable intangible assets 940 92        
Net increase in goodwill     $ 1,961      
Net increase in core deposit premiums     $ 1,170      
Servicing assets       $ 415    
Customer Lists [Member]            
Intangible assets acquired $ 1,100 $ 591