Segment information - Revenue Classified by Major Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 237,222	$ 340,293	$ 503,250	$ 713,575
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	225,500	326,485	477,410	683,192
Europe/Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	10,474	12,501	22,451	27,911
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 1,248	$ 1,307	$ 3,389	$ 2,472