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Derivatives (Tables)
9 Months Ended
Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments
September 30, 2023December 31, 2022
Asset DerivativesLiability DerivativesAsset DerivativesLiability Derivatives
Coal Swap Contracts$— $— $6,024 $(21,166)
Effect of Counterparty Netting— — (6,024)6,024 
Net Derivatives as Classified in the Consolidated Balance Sheets$— $— $— $(15,142)