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Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 7,274,316	$ 6,971,631
Less accumulated depreciation, depletion and impairment	(3,251,117)	(2,840,560)
Property and equipment, net	4,023,199	4,131,071
Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	6,960,256	6,679,894
Oil and natural gas properties
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	200,822	196,234
Buildings
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	90,710	83,465
Land
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 22,528	$ 12,038

X

- Definition

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

+ References

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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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