Breakdown of Revenue and Non-Current Assets by Geographical Areas - Other Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 273,921	$ 281,047
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	98,751	104,389
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	98,538	100,107
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	17,016	20,336
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	32,751	19,701
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	20,405	9,617
Singapore
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	8,460	5,970
Holding
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 125,403	$ 136,621