Intangible Assets, Net (Gross And Net Carrying Amounts For Each Major Class Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 4,363,758	$ 3,846,534
Accumulated amortization	(976,560)	(712,401)
Net book value	3,387,198	3,134,133
Current Contract Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	3,154,616	2,744,968
Accumulated amortization	(649,861)	(462,016)
Net book value	2,504,755	2,282,952
Network Location Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,209,142	1,101,566
Accumulated amortization	(326,699)	(250,385)
Net book value	$ 882,443	$ 851,181