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Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total property and equipment	$ 8,089,473	$ 8,551,419
Less accumulated depreciation, depletion, amortization and impairment	(5,328,432)	(5,244,742)
Property and equipment, net	2,761,041	3,306,677
Equipment
Property Plant And Equipment [Line Items]
Total property and equipment	7,647,451	8,114,326
Oil and natural gas properties
Property Plant And Equipment [Line Items]
Total property and equipment	222,738	226,646
Buildings
Property Plant And Equipment [Line Items]
Total property and equipment	193,503	184,700
Land
Property Plant And Equipment [Line Items]
Total property and equipment	$ 25,781	$ 25,747

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business 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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