Other liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Miscellaneous current liabilities [abstract]

Disclosure of detailed information about other current liabilities [Table Text Block]

		Dec. 31, 2021		Dec. 31, 2020
Current
Environmental and other provisions (note 18)	$	41,017	$	33,675
Pension liability (note 19)		10,472		13,552
Other employee benefits (note 20)		3,530		3,154
Unearned revenue		7,983		1,590
	$	63,002	$	51,971