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Property and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Property Plant And Equipment [Line Items]    
Total property and equipment $ 8,408,935 $ 8,551,419
Less accumulated depreciation, depletion and impairment (5,375,106) (5,244,742)
Property and equipment, net 3,033,829 3,306,677
Equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment 7,973,956 8,114,326
Oil and natural gas properties    
Property Plant And Equipment [Line Items]    
Total property and equipment 220,804 226,646
Buildings    
Property Plant And Equipment [Line Items]    
Total property and equipment 189,857 184,700
Land    
Property Plant And Equipment [Line Items]    
Total property and equipment $ 24,318 $ 25,747