Summary of Significant Accounting Policies - Additional (Details) $ in Thousands		12 Months Ended
	May 29, 2015	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Stock split conversion ratio	0.0333
Service fees		$ 459	$ 492
Amortization period of intangible assets		10 years
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		25 years
Minimum | Building improvements
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		3 years
Minimum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		3 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		40 years
Maximum | Building improvements
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		15 years
Maximum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment useful life		10 years