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Other Losses Other Losses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Other Income and Expenses [Abstract]    
Pension and other post-employment non-service costs (note 10) $ (17,332) $ (4,990)
Acquisition and transition-related costs (note 3) (11,609) (687)
Other 15,085 2,725
Other losses $ (44,026) $ (8,402)