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Other long-term liabilities
 12 Months Ended
Dec. 31, 2024
Subclassifications of assets, liabilities and equities [abstract]  
Other long-term liabilities Other long-term liabilities:
As at
Dec 31
2024		Dec 31
2023
Share-based compensation liability (note 14)
$73,547 $74,107 
Site restoration costs
38,048 32,596 
Land mortgage
27,483 28,014 
Defined benefit pension plans (note 21)
20,531 22,691 
Cash flow hedges (note 19)
36,811 91,183 
Other
882 1,319 
197,302 249,910 
Less current maturities
(46,840)(94,992)
$150,462 $154,918 
Site restoration costs:
The Company has accrued liabilities related to the decommissioning and reclamation of its methanol production sites and oil and gas properties. Because of uncertainties in estimating the amount and timing of the expenditures related to the sites, actual results could differ from the amounts estimated. As at December 31, 2024, the total undiscounted amount of estimated cash flows required to settle the liabilities was $64.1 million (2023 - $50.6 million). The movement in the provision during the year is explained as follows:
20242023
Balance at January 1
$32,596 $36,581 
New or revised provisions
3,831 (5,573)
Accretion expense
1,621 1,588 
Balance at December 31
$38,048 $32,596