Intangible Assets, Net (Gross And Net Carrying Amounts For Each Major Class Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 5,182,263	$ 4,363,758
Accumulated amortization	(1,141,073)	(976,560)
Net book value	4,041,190	3,387,198
Current Contract Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	3,864,470	3,154,616
Accumulated amortization	(772,211)	(649,861)
Net book value	3,092,259	2,504,755
Network Location Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	1,317,793	1,209,142
Accumulated amortization	(368,862)	(326,699)
Net book value	$ 948,931	$ 882,443