Other Intangible Assets - Textual (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ (2,864)	$ (3,039)
Core deposit intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period			7 years
Amortization of intangible assets	$ (1,400)	$ (1,500)	$ (2,900)	$ (3,000)
Estimated Future Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2018	2,900		2,900
2019	5,400		5,400
2020	4,900		4,900
2021	4,500		4,500
2022	4,200		4,200
2023 and thereafter	$ 9,500		$ 9,500