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Revenues (Tables)
 3 Months Ended
Mar. 31, 2018
Schedule of Contractual Revenues [Line Items]  
Schedule of Contractual Revenue
The following table is a summary of the contracted amounts owed to the Company by customers pursuant to site rental contracts in effect as of March 31, 2018.
 
 
Nine months ending December 31,
 
Years ending December 31,
 
 
 
 
 
 
2018
 
2019
 
2020
 
2021
 
2022
 
Thereafter
 
Total
Contracted amounts(a)
 
$
3,007

 
$
3,755

 
$
3,476

 
$
3,195

 
$
2,956

 
$
5,900

 
$
22,289

    
(a)
Excludes amounts related to network services, as those contracts generally have a duration of one year or less.