Other long-term liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Subclassifications of assets, liabilities and equities [abstract]

Composition of other liabilities

As at	Dec 31 2022		Dec 31 2021
Share-based compensation liability (note 14)	$	70,569	$	68,634
Site restoration costs	36,581		29,355
Land mortgage	28,514		28,985
Defined benefit pension plans (note 21)	19,216		20,616
Cash flow hedges (note 19)	6,739		60,098
Other	2,532		3,252
	164,151		210,940
Less current maturities	(29,548)		(17,191)
	$	134,603	$	193,749

Provision for site restoration costs

The movement in the provision during the year is explained as follows:

	2022		2021
Balance at January 1	$	29,355	$	31,941
New or revised provisions	6,915		(2,767)
Accretion expense	311		181
Balance at December 31	$	36,581	$	29,355