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Goodwill and Other Intangible Assets - Estimated Amortization Expense for Covenants Not To Compete and Core Deposit and Customer Related Intangibles (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2017 $ 674
2018 2,115
2019 1,565
2020 1,200
2021 923
Thereafter $ 1,534