Segments and Information about Revenues by Geographic Region (Tables)
9 Months Ended
Sep. 30, 2016
Segment Reporting [Abstract]  
Reconciliation of Revenue from Segments to Consolidated
The following table presents our revenues by geographic region of end users who purchased products or services for the periods presented below:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
 
(in thousands)
United States and Canada
$
147,820

 
$
128,667

 
$
412,946

 
$
340,229

International
58,237

 
42,165

 
163,344

 
110,608

Total revenues
$
206,057

 
$
170,832

 
$
576,290

 
$
450,837