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ACCRUED WORKERS' COMPENSATION AND PNEUMOCONIOSIS BENEFITS - Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
ACCRUED WORKERS' COMPENSATION AND PNEUMOCONIOSIS BENEFITS |  |  |
Workers' compensation claims | $ 47,975 | $ 49,452 | $ 53,448
Pneumoconiosis benefit claims | 132,444 | 104,287 |
Total obligations | 180,419 | 153,739 |
Less current portion | (15,913) | (14,099) |
Non-current obligations | $ 164,506 | $ 139,640 |

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- Definition Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Also includes, the current portion of the liability for benefits payable to workers affected by coal workers pneumoconiosis. + References No definition available. + Details
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