Property and Equipment Schedule of Useful Lives (Details)	12 Months Ended
	Dec. 31, 2016
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	50 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	1 year
Computer and communications equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Computer and communications equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	1 year
Land, buildings and improvements | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	50 years
Land, buildings and improvements | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	12 years
Leasehold improvements | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Leasehold improvements | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	1 year
Furniture and fixtures | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	12 years
Furniture and fixtures | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Capital lease equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Capital lease equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Other equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Other equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years