Acquisitions (Schedule of Consideration Transferred) (Details) (USD $)	0 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 04, 2013 MIPT Acquisition	Sep. 30, 2014 MIPT Acquisition	Sep. 30, 2014 MIPT Acquisition		Jul. 31, 2014 Other US Acquisition 2014	Sep. 30, 2014 Other US Acquisition 2014 sites	Sep. 30, 2014 Other US Acquisition 2014 sites
Fair Value Of Consideration Transferred [Line Items]
Business Acquisition, Contingent Consideration, Actual Cash Payment		$ 100,000	$ 1,400,000			$ 100,000	$ 100,000
Number of communications sites acquired						44	44
Partial payment of aggregate purchase price		14,500,000	14,500,000
Aggregate purchase price	4,900,000,000		4,858,083,000		132,500,000		49,100,000
Noncash or part noncash acquisition, value of liabilities assumed	1,500,000,000		1,527,621,000
Business acquisition, cost of acquired entity, cash paid	$ 3,300,000,000		$ 3,330,462,000	[1]

[1] Cash consideration includes $14.5 million of an additional purchase price adjustment which was paid to the sellers during the nine months ended September 30, 2014 and is reflected in Accrued expenses on the consolidated balance sheet included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.