Other Intangible Assets - Textual (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ (4,564)	$ (6,736)
Core deposit intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ (1,500)	$ (1,200)	(4,500)	$ (3,400)
Estimated Future Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2017	1,500		1,500
2018	5,700		5,700
2019	5,400		5,400
2020	4,900		4,900
2021	4,500		4,500
2022 and thereafter	$ 13,800		$ 13,800