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Goodwill and Intangible Assets - Schedule of Intangible Assets and Goodwill (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Goodwill And Intangible Assets [Line Items]    
Goodwill $ 28,810 $ 28,810
Finite-Lived Intangible Assets, Gross Carrying Amount 25,618 27,831
Finite-Lived Intangible Assets, Accumulated Amortization (11,107) (10,110)
Finite-Lived Intangible Assets, Net Carrying Amount 14,511 17,721
Core Deposit Intangibles    
Goodwill And Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross Carrying Amount 21,825 21,825
Finite-Lived Intangible Assets, Accumulated Amortization (10,027) (8,423)
Finite-Lived Intangible Assets, Net Carrying Amount 11,798 13,402
Other Intangible Assets    
Goodwill And Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross Carrying Amount 3,793 6,006
Finite-Lived Intangible Assets, Accumulated Amortization (1,080) (1,687)
Finite-Lived Intangible Assets, Net Carrying Amount $ 2,713 $ 4,319