Quarterly report pursuant to Section 13 or 15(d)

Geographical Information (Details)

v3.8.0.1
Geographical Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues $ 175,614 $ 149,155 $ 500,817 $ 422,684  
Property, Plant and Equipment, Net 35,274   35,274   $ 33,000
United States          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 158,750 135,160 452,333 381,628  
Property, Plant and Equipment, Net 29,927   29,927   28,713
International          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 16,864 $ 13,995 48,484 $ 41,056  
India          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Property, Plant and Equipment, Net 4,886   4,886   3,596
Other          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Property, Plant and Equipment, Net $ 461   $ 461   $ 691