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Segment Reporting (Tables)
 12 Months Ended
Dec. 31, 2017
Segment Reporting [Abstract]  
Composition of revenue
The Company's revenue is comprised of the following:
 
Years Ended
December 31,
 
2017
 
2016
 
2015
 
(in thousands)
Colocation
$
304,720

 
$
259,046

 
$
218,498

Connectivity
67,690

 
53,715

 
43,147

Other
5,865

 
5,591

 
4,225

Revenue
$
378,275

 
$
318,352

 
$
265,870