Description of Business and Summary of Significant Accounting Policies (Fixed Assets) (Details) (Details)	12 Months Ended
	Dec. 31, 2018
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	39 years
Building Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	15 years
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Furniture, fixtures and other
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	7 years
Software
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Land Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	20 years