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REVENUE FROM CONTRACTS WITH CUSTOMERS - Supply contracts (Details) $ in Thousands | Jun. 30, 2022 USD ($)
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Performance obligations unsatisfied or partially unsatisfied |
Total | $ 3,026,931
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 1,032,665
Expected timing of satisfaction period | 6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 1,064,902
Expected timing of satisfaction period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 597,917
Expected timing of satisfaction period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 331,447
Expected timing of satisfaction period | 1 year
Illinois Basin |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 2,032,271
Illinois Basin | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 650,837
Expected timing of satisfaction period | 6 months
Illinois Basin | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 729,307
Expected timing of satisfaction period | 1 year
Illinois Basin | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 361,381
Expected timing of satisfaction period | 1 year
Illinois Basin | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 290,746
Expected timing of satisfaction period | 1 year
Appalachia |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 994,660
Appalachia | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 381,828
Expected timing of satisfaction period | 6 months
Appalachia | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 335,595
Expected timing of satisfaction period | 1 year
Appalachia | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 236,536
Expected timing of satisfaction period | 1 year
Appalachia | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 40,701
Expected timing of satisfaction period | 1 year

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