Concentration Of Credit Risk (Tables)

9 Months Ended

Sep. 30, 2014

Concentration Of Credit Risk [Abstract]

Summary Of Significant Customers And Percentage Of Total Revenue For Specified Time Periods Derived From Such Customers

	For the three months		For the nine months
	ended September 30,		ended September 30,
	2014	2013	2014	2013
Percentage of Domestic Site Leasing Revenue
AT&T Wireless (1)	31.1%	27.2%	29.7%	25.8%
Sprint (2)	25.1%	30.8%	26.2%	30.4%
T-Mobile (3)	19.1%	18.1%	19.4%	17.9%
Verizon Wireless	14.2%	13.7%	14.0%	13.1%
	For the three months		For the nine months
	ended September 30,		ended September 30,
	2014	2013	2014	2013
Percentage of International Site Leasing Revenue
Oi	46.2%	1.3%	43.1%	1.2%
Telefonica	27.2%	49.3%	30.2%	52.0%
Digicel	4.5%	11.8%	5.0%	12.0%
	For the three months		For the nine months
	ended September 30,		ended September 30,
	2014	2013	2014	2013
Percentage of Site Development Revenue
Sprint (2)	46.1%	1.8%	32.2%	0.9%
Ericsson, Inc.	16.1%	32.2%	17.2%	38.1%
Verizon Wireless	10.0%	4.9%	9.8%	4.3%
T-Mobile (3)	7.4%	10.5%	8.9%	7.9%
Alcatel-Lucent	0.7%	8.1%	2.5%	10.1%

(1)Prior year amounts have been adjusted to reflect the merger of AT&T Wireless and Cricket.

(2)Prior year amounts have been adjusted to reflect the merger of Sprint and Clearwire.

(3)Prior year amounts have been adjusted to reflect the merger of T-Mobile and Metro PCS.