Segment and Geographical Information - Property, Plant and Equipment, Net Based On Geographical Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 188,637	$ 165,538
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	101,073	78,244
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	50,121	52,375
Philippines
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	28,558	26,006
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 8,885	$ 8,913