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ASSET RETIREMENT AND ENVIRONMENTAL OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2022
Asset Retirement Obligation And Environmental Remediation Obligations [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following is a summary of the Company’s ARO:
December 31,
(in thousands)20222021
Beginning balance$17,757 $25,646 
Obligations settled(144)(199)
Accretion expense976 1,876 
Additional ARO— 213 
Revisions in estimated cash flows(13,114)(9,779)
Ending balance$5,475 $17,757 
Schedule Of Environmental Remediation Costs
As of December 31, 2022, the total environmental remediation costs were as follows (in thousands):
Year ending December 31,
2023$520 
2024536 
2025552 
2026569 
2027587 
Thereafter24,411 
Total27,175 
Effect of discounting(10,075)
Total environmental obligations$17,100