Segment and Geographical Information - Property, Plant and Equipment, Net Based on Geographical Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 162,700	$ 184,793
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	79,604	97,261
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	50,095	46,659
Philippines
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	22,011	29,434
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 10,990	$ 11,439