Property And Equipment, Net (Property And Equipment, Net (Including Assets Held Under Capital Leases)) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 4,856,908	$ 4,709,036
Less: accumulated depreciation	(2,136,034)	(1,946,619)
Property and equipment, net	2,720,874	2,762,417
Towers and Related Components [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	4,264,917	4,194,375
Construction-In-Process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	29,360	35,855
Furniture, Equipment and Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	55,500	51,832
Land, Buildings, and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 507,131	$ 426,974