Premises and Equipment - Schedule of Premises and Equipment and Related Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 107,664	$ 104,340
Less: accumulated depreciation	(41,013)	(38,448)
Total Premises and Equipment	66,651	65,892
Land
Property Plant And Equipment [Line Items]
Premises and equipment, gross	18,698	19,253
Premises
Property Plant And Equipment [Line Items]
Premises and equipment, gross	44,301	43,419
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Premises and equipment, gross	21,700	20,421
Leasehold Improvements
Property Plant And Equipment [Line Items]
Premises and equipment, gross	10,515	8,276
Equipment
Property Plant And Equipment [Line Items]
Premises and equipment, gross	11,583	9,851
Construction In Process
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 867	$ 3,120