Breakdown of Revenue and Non-Current Assets by Geographical Areas - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) market	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) market	Sep. 30, 2019 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of geographical markets | market	3		3
Revenue	$ 470,345	$ 522,606	$ 1,411,335	$ 1,608,876
Sales Revenue, Net | Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			1.20%	2.70%
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 30,700	$ 33,500	$ 90,000	$ 106,200