ASSET RETIREMENT AND ENVIRONMENTAL RECLAMATION OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2023

Asset Retirement Obligation And Accrual For Environmental Loss Contingencies Disclosure [Abstract]

Schedule of Asset Retirement Obligations and Environmental Reclamation Obligations

Aggregate carrying amounts of asset retirement obligations and environmental reclamation obligations are as follows (dollars in thousands):

	2023		2022
Obligations at beginning of period	$	187,007	$	90,281
Liabilities incurred	—		—
Liabilities settled	(5,711)		(3,184)
Accretion expense	5,298		6,163
Change in estimate	30,607		93,747
Total obligations at end of period	$	217,201	$	187,007
Less current obligations at end of period	(21,635)		(5,419)
Long-term obligations at end of period	$	195,566	$	181,588