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Segment Information - Summary of Revenues and Property and Equipment, Net by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 874,697	$ 970,993
Property and Equipment, Net	115,544		$ 121,027
North America
Segment Reporting Information [Line Items]
Revenues	716,346	797,946
Property and Equipment, Net	111,398		116,460
Middle East
Segment Reporting Information [Line Items]
Revenues	153,643	168,859
Property and Equipment, Net	4,146		$ 4,567
Rest of World
Segment Reporting Information [Line Items]
Revenues	$ 4,708	$ 4,188

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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