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Goodwill and Intangible Assets Amortization Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Total Amortization Expense [Abstract]          
Amortization of intangible assets $ 559 $ 402 $ 1,106 $ 857  
Estimated Amortization Expense [Abstract]          
For period 07/01/17-12/31/17 1,049   1,049    
For year ended 12/31/18 1,954   1,954    
For year ended 12/31/19 1,778   1,778    
For year ended 12/31/20 1,576   1,576    
For year ended 12/31/21 1,304   1,304    
For year ended 12/31/22 1,195   1,195    
Core Deposits [Member]          
Total Amortization Expense [Abstract]          
Amortization of intangible assets 472 357 943 766  
Customer Lists [Member]          
Total Amortization Expense [Abstract]          
Amortization of intangible assets 45 45 91 91  
Mortgage Servicing Rights [Member]          
Total Amortization Expense [Abstract]          
Amortization of intangible assets $ 42 $ 0 $ 72 $ 0 $ 98