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
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
COMMITMENTS AND CONTINGENCIES    
Contingent decommissioning obligations, beginning of period $ 36,157 $ 22,551
Liabilities settled (2,891) (1,439)
Accrual for additional estimated liabilities   13,658
Contingent decommissioning obligations, end of period 33,266 34,770
Less: Current portion (8,717) (759)
Long-term $ 24,549 $ 34,011