Goodwill and Other Intangible Assets - (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Total intangible amortization	$ 1,493	$ 1,742	$ 3,056	$ 3,439
Core Deposit Intangibles
Finite-Lived Intangible Assets [Line Items]
Total intangible amortization	1,460	1,709	2,990	3,373
Customer Relationship Intangible
Finite-Lived Intangible Assets [Line Items]
Total intangible amortization	$ 33	$ 33	$ 66	$ 66