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COMMITMENTS AND CONTINGENCIES (Tables)
 3 Months Ended
Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Summary of Environmental Liability A summary of the changes to the aggregate environmental remediation liabilities for the three months ended March 31, 2023 and 2022 follows:
Three Months Ended
March 31,
20232022
Beginning balance$6,335 $5,887 
Accretion expense26 26 
Obligations settled (1)
(18)(49)
Ending balance6,343 5,864 
Less: current portion1,131 304 
Long-term portion$5,212 $5,560 
(1)May include amounts paid and amounts that are being processed through accounts payable as a part of our disbursement cycle.