Breakdown of Revenue and Non-Current Assets by Geographical Areas - Other Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 261,666	$ 281,047
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	94,642	104,389
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	94,412	100,107
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	18,158	20,336
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	21,159	19,701
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	11,844	9,617
Singapore
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	5,374	5,970
Holding
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 127,707	$ 136,621