Quarterly report [Sections 13 or 15(d)]

COMMITMENTS AND CONTINGENCIES - contingent decommissioning obligations (Details)

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COMMITMENTS AND CONTINGENCIES - contingent decommissioning obligations (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
COMMITMENTS AND CONTINGENCIES    
Contingent decommissioning obligations, beginning of period $ 36,157 $ 22,551
Liabilities settled (4,772) (1,660)
Accrual for additional estimated liabilities   13,659
Contingent decommissioning obligations, end of period 31,385 34,550
Less: Current portion (17,534) (759)
Long-term $ 13,851 $ 33,791