Segment Information - Summary of Revenues and Property and Equipment, Net by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 879,356	$ 979,459	$ 1,754,053	$ 1,950,452
Property and Equipment, Net	110,617		110,617		$ 121,027
North America
Segment Reporting Information [Line Items]
Revenues	725,047	800,044	1,441,393	1,597,990
Property and Equipment, Net	106,737		106,737		116,460
Middle East
Segment Reporting Information [Line Items]
Revenues	147,675	174,689	301,318	343,548
Property and Equipment, Net	3,880		3,880		$ 4,567
Rest of World
Segment Reporting Information [Line Items]
Revenues	$ 6,634	$ 4,726	$ 11,342	$ 8,914