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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Obligation at beginning of the year $ 36,692 $ 29,459
Additional liabilities incurred 262 5,444
Liabilities settled (128) 0
Accretion 2,209 1,789
Obligation at the end of the year $ 39,035 $ 36,692