INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 88,897	$ 5,933
Other comprehensive income (loss)
Gain (loss) related to defined benefit pension plans	(116)	1,061
Income tax recovery (provision)	62	(681)
Gain (loss) related to defined benefit pension plans, net of tax	(54)	380
Foreign currency translation adjustment	(10,522)	(36,023)
Other comprehensive loss, net of taxes	(10,576)	(35,643)
Total comprehensive income (loss)	$ 78,321	$ (29,710)