Segments and Related Information (Foreign Operations) (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segments and Related Information [Line Items]
Revenue			$ 1,586,181	$ 1,111,010	$ 3,792,811	$ 3,180,906
Property and equipment, net	$ 554,513	$ 558,667	554,513		554,513
Intangible assets and goodwill, net	1,183,700	1,187,900	1,183,700		1,183,700
United States [Member]
Segments and Related Information [Line Items]
Revenue			1,500,000	1,000,000	3,600,000	2,700,000
Property and equipment, net	476,200	464,600	476,200		476,200
Intangible assets and goodwill, net	1,100,000	1,100,000	1,100,000		1,100,000
Foreign Operations [Member]
Segments and Related Information [Line Items]
Revenue			73,800	$ 115,200	222,800	$ 451,200
Property and equipment, net	78,300	94,100	78,300		78,300
Intangible assets and goodwill, net	$ 111,100	$ 107,300	$ 111,100		$ 111,100
Foreign Operations [Member] | Accounts Receivable, Net, Less Billings in Excess of Costs and Earnings [Member] | Geographic Concentration Risk [Member] | Foreign Customers [Member]
Segments and Related Information [Line Items]
Concentration risk, percentage of total	9.00%	17.00%