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Depreciation, Depletion, Amortization and Impairment Expense Related to Property and Equipment and Intangible Assets and Liabilities (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Abstract]      
Depreciation and impairment expense $ 644,943 $ 974,206 $ 887,155
Amortization expense 19,281 17,722 18,197
Depletion expense 6,686 11,945 10,966
Total $ 670,910 $ 1,003,873 $ 916,318