Property And Equipment, Net (Property And Equipment, Net (Including Assets Held Under Capital Leases)) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 4,717,098	$ 4,709,036
Less: accumulated depreciation	(2,014,910)	(1,946,619)
Property and equipment, net	2,702,188	2,762,417
Towers and Related Components [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	4,188,307	4,194,375
Construction-In-Process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	30,111	35,855
Furniture, Equipment and Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	55,562	51,832
Land, Buildings, and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 443,118	$ 426,974