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Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Total property and equipment	$ 8,828,327	$ 8,803,668
Less accumulated depreciation, depletion and impairment	(4,929,809)	(4,801,119)
Property and equipment, net	3,898,518	4,002,549
Equipment
Property Plant And Equipment [Line Items]
Total property and equipment	8,392,658	8,370,933
Oil and natural gas properties
Property Plant And Equipment [Line Items]
Total property and equipment	221,782	219,855
Buildings
Property Plant And Equipment [Line Items]
Total property and equipment	186,989	186,736
Land
Property Plant And Equipment [Line Items]
Total property and equipment	$ 26,898	$ 26,144

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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