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Goodwill and Intangible Assets Amortization Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Total Amortization Expense [Abstract]        
Amortization of intangible assets $ 1,373 $ 838 $ 4,552 $ 2,059
Estimated Amortization Expense [Abstract]        
For period 10/01/19-12/31/19 1,396   1,396  
For year ended 12/31/20 4,836   4,836  
For year ended 12/31/21 4,192   4,192  
For year ended 12/31/22 3,826   3,826  
For year ended 12/31/23 3,510   3,510  
For year ended 12/31/24 2,910   2,910  
Core Deposits [Member]        
Total Amortization Expense [Abstract]        
Amortization of intangible assets 935 669 2,868 1,680
Customer Lists [Member]        
Total Amortization Expense [Abstract]        
Amortization of intangible assets 317 46 952 137
Mortgage Servicing Rights [Member]        
Total Amortization Expense [Abstract]        
Amortization of intangible assets $ 121 $ 123 $ 732 $ 242