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Other long-term liabilities (Tables)
 12 Months Ended
Dec. 31, 2025
Subclassifications of assets, liabilities and equities [abstract]  
Schedule of composition of other liabilities
As at
Dec 31
2025		Dec 31
2024
Share-based compensation liability (note 14)
$51,559 $73,547 
Site restoration costs
42,390 38,048 
Land mortgage
26,920 27,483 
Defined benefit pension plans (note 21)
21,849 20,531 
Cash flow hedges (note 19)
36,106 36,811 
Other
4,012 882 
182,836 197,302 
Less current maturities
(25,598)(46,840)
$157,238 $150,462 
Schedule of provision for site restoration costs The movement in the provision during the year is explained as follows:
20252024
Balance at January 1
$38,048 $32,596 
New or revised provisions
(11,154)3,831 
Additions - acquired plant sites
13,685 — 
Accretion expense
1,811 1,621 
Balance at December 31
$42,390 $38,048