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Interim Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustment, tax expense $ (321) $ 0 $ 436 $ 0
Net gain on pension and other post-retirement benefits (67) (51) (201) (155)
Unrealized gain (loss) on derivative instruments $ (354) $ 205 $ (955) $ 1,586