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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustment, tax (recovery) and expense $ (822) $ (2,921) $ (1,359) $ (2,782)
Change in fair value of cash flow hedge, tax (recovery) and expense (12,969) (2,302) (10,283) (7,389)
Change in unrealized pension and other post-employment expense, tax expense and (recovery) $ (196) $ (22) $ (335) $ (9)