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Finance income and expense
 12 Months Ended
Dec. 31, 2025
Analysis of income and expense [abstract]  
Finance income and expense Finance income and expense:
20252024
Employee future benefit plan expense$(21)$(20)
Investment income24,534 36,885 
Mark to market and foreign exchange gain (loss) on financial assets (notes 12 & 31)1,743 (14,788)
Foreign exchange gain (loss)427 (3,144)
Government recoveries700 — 
Finance income and other$27,383 $18,933 
Finance expense$(1,905)$(2,146)