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Business Combinations (Details 1) - USD ($)
$ in Thousands
Jul. 31, 2017
Jun. 01, 2016
Sep. 30, 2017
Dec. 31, 2016
Assets and liabilities arising from acquisition        
Goodwill created     $ 38,201 $ 37,164
Bowers Insurance Agency Inc        
Consideration        
Cash   $ 1,137    
Stock   1,138    
Contingent consideration $ 316 880    
Fair value of total consideration transferred   3,155    
Fair value of assets acquired        
Cash   64    
Premises and equipment   290    
Other assets   34    
Total assets acquired   388    
Fair value of liabilities assumed   124    
Net assets acquired   264    
Assets and liabilities arising from acquisition        
Identified intangible assets   1,630    
Deferred tax liability   (588)    
Goodwill created   1,849    
Total net assets acquired   $ 3,155