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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations
AROs at December 31, 2025 and 2024 were (in thousands): 
 20252024
Asset retirement obligations  $16,909 $14,109 
Less: Asset retirement obligations due within one year (1)  
2,291 747 
Long-term asset retirement obligations (2)
$14,618 $13,362 
(1)
Classified as a current liability on the consolidated balance sheets, under the caption “Other current liabilities.” Balance at December 31, 2025 related to remediation work planned for 2026.
(2)
Classified as a long-term liability on the consolidated balance sheets, under the caption “Other noncurrent liabilities.” Balance at December 31, 2025.
Schedule of Change in Asset Retirement Obligation
During the years ended December 31, 2025, 2024 and 2023, our ARO changed as follows (in thousands): 
 202520242023
Balance as of January 1$14,109 $16,215 $18,113 
Accretion of discount1,145 1,112 1,104 
New obligations1,386 — — 
Change in estimates of existing obligations 186 20 1,366 
Settlement of obligations(638)(1,936)(4,756)
Foreign currency translation 721 (1,302)388 
Balance as of December 31$16,909 $14,109 $16,215