Property And Equipment - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Property, Plant and Equipment [Abstract]
Capital lease obligation period			5 years
Amortization of assets held under capital leases	$ 9.2	$ 10.4	$ 18.8	$ 21.2