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Concentration Of Credit Risk (Tables) | 9 Months Ended
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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)P rior year amounts have been adjusted to reflect the merger of T-Mobile and Metro PCS.

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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 + Details
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