Quarterly report pursuant to Section 13 or 15(d)

Reportable Segments - Revenue by Geographic Region (Details)

v3.8.0.1
Reportable Segments - Revenue by Geographic Region (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues $ 109,675 $ 98,271
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 43,995 32,573
Russia    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 31,292 34,448
EMEA & Asia    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 20,044 15,101
Latin America    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 3,513 2,866
Other CIS    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 3,550 6,308
Other    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues $ 7,281 $ 6,975