ENVIRONMENTAL AND NATURAL RESOURCE DAMAGE LIABILITIES - Schedule of Liabilities (Details) $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance, non-current portion	$ 10,615
Beginning balance, plus: current portion	1,026
Beginning balance	11,641
Expenditures	(762)
Increase to liabilities	71
Ending balance	10,950
Ending balance, less: current portion	(1,095)
Ending balance, non-current portion	$ 9,855

Accrual for Environmental Loss Contingencies Increase (Decrease) to Liability

No definition available.

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Amount of expense for newly incurred environmental loss contingencies. Includes, but is not limited to, remediation expense and interest accretion.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer.

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