Concentration Of Credit Risk (Tables)

3 Months Ended

Mar. 31, 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 ended March 31,
	2014	2013
Percentage of Site Leasing Revenue
AT&T Wireless (1)	25.1%	22.9%
Sprint (2)	24.2%	28.1%
T-Mobile (3)	17.6%	16.6%
Verizon Wireless	12.3%	11.9%
	For the three months ended March 31,
	2014	2013
Percentage of Site Development Revenue
Ericsson, Inc.	18.6%	40.4%
Sprint (2)	17.8%	0.1%
Alcatel-Lucent	4.7%	11.3%

(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.