Premises and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Total premise and equipment	$ 62,497	$ 55,812
Accumulated depreciation and amortization	(22,280)	(20,169)
Total premise and equipment, net	40,217	35,643
Depreciation expense and amortization of leasehold improvements	2,264	1,865	$ 1,793
Land
Property, Plant and Equipment [Line Items]
Total premise and equipment	2,600	2,600
Furniture And Equipment
Property, Plant and Equipment [Line Items]
Total premise and equipment	12,641	11,363
Tenant Improvements
Property, Plant and Equipment [Line Items]
Total premise and equipment	$ 8,023	8,019
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, useful life	39 years
Total premise and equipment	$ 39,233	$ 33,830
Minimum | Furniture And Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, useful life	3 years
Minimum | Tenant Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, useful life	2 years
Maximum | Furniture And Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, useful life	7 years
Maximum | Tenant Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, useful life	15 years