Segment information - Revenues Generated in United States and All International Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 836,727	$ 595,696	$ 2,344,121	$ 1,551,701
United States
Segment Reporting Information [Line Items]
Revenues	781,792	559,057	2,196,717	1,463,129
International
Segment Reporting Information [Line Items]
Revenues	$ 54,935	$ 36,639	$ 147,404	$ 88,572