Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 98,714	$ 98,396
Accumulated depreciation	(53,715)	(49,269)
Premises and equipment, net	44,999	49,127
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	6,397	8,699
Premises
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	52,696	52,968
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	32,328	29,543
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 7,293	$ 7,186