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WORKERS' COMPENSATION AND PNEUMOCONIOSIS - Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of changes in the workers' compensation liability
Beginning balance	$ 49,452	$ 53,448
Changes in accruals	3,874	2,275
Payments	(3,859)	(2,804)
Interest accretion	550	287
Ending balance	50,017	$ 53,206
Other long-term assets
Estimated present value of future obligations and other information
Receivables for traumatic injury claims	$ 4,100

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- Definition

Represents the change in the liability for workers' compensation due to payments made during the period.

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- Definition

Represents the change in the liability for workers' compensation due to additional amounts accrued during the period.

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Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

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- Definition

Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

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Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature.

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