Concentration Of Credit Risk (Tables)

6 Months Ended

Jun. 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 six months
	ended June 30,		ended June 30,
	2014	2013	2014	2013
Percentage of Domestic Site Leasing Revenue
AT&T Wireless (1)	29.6%	25.4%	29.0%	25.1%
Sprint (2)	26.3%	30.1%	26.7%	30.2%
T-Mobile (3)	19.2%	17.9%	19.5%	17.9%
Verizon Wireless	13.9%	12.8%	13.8%	12.8%
	For the three months		For the six months
	ended June 30,		ended June 30,
	2014	2013	2014	2013
Percentage of International Site Leasing Revenue
Oi	49.5%	1.2%	41.0%	1.2%
Telefonica	26.0%	53.9%	30.4%	53.4%
Digicel	4.4%	12.0%	5.3%	12.1%
	For the three months		For the six months
	ended June 30,		ended June 30,
	2014	2013	2014	2013
Percentage of Site Development Revenue
Sprint (2)	30.0%	0.8%	24.5%	0.5%
Ericsson, Inc.	17.2%	41.8%	17.8%	41.2%
T-Mobile (3)	10.2%	7.0%	9.7%	6.5%
Verizon Wireless	11.9%	4.0%	9.7%	4.0%
Alcatel-Lucent	2.6%	10.9%	3.6%	11.1%

(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.