Summary of Significant Accounting Policies - Fixed Assets (Details)	12 Months Ended
	Dec. 31, 2016
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed asset useful life (in years)	30 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Fixed asset useful life (in years)	5 years
Computer Software, Intangible Asset [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Fixed asset useful life (in years)	3 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Fixed asset useful life (in years)	5 years