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Fixed Assets, Mineral Leaseholds, and Asset Retirement Obligations (Depreciation and Depletion Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Fixed Assets And Asset Retirement Obligations [Abstract]        
Depreciation expense $ 70,328 $ 63,482 $ 206,111 $ 190,332
Depletion expense $ 896 $ 959 $ 2,830 $ 2,575