Commitments And Contingencies (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended			12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 03, 2010 Mexico Litigation [Member]	Oct. 17, 2012 Mexico Litigation [Member]	Aug. 02, 2012 Mexico Litigation [Member]	Dec. 31, 2012 Television And Radio Broadcast [Member] y	Dec. 31, 2012 Wireless Communications [Member] y	Dec. 31, 2012 International [Member] y	Aug. 30, 2005 At T Transaction [Member] sites	Dec. 31, 2012 At T Transaction [Member]	Dec. 31, 2000 ALLTEL Transaction [Member] y sites	Dec. 31, 2012 ALLTEL Transaction [Member]
Damages assessed by the intermediate appellate court				$ 6,700,000
Aggregate rent expense	419,000,000	366,100,000	300,000,000
Number of towers leased or subleased										2,450		1,800
Average lease term (in years)										27
Customer lease initial term maximum years							20	10
Customer lease initial term minimum years							10	5
Customer lease years of term									10
Aggregate purchase option price for towers											545,200,000		69,100,000
Purchase price accretion rate (per year)											10.00%	3.00%
Sublease term towers, years												15
Cash purchase price per tower												27,500
Purchase price of tower in shares of common stock													769
Value of potential shares payable													105,500,000
Amount the court entered judgement					$ 7,900,000	$ 6,500,000