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Interim Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Comprehensive Income [Abstract]        
Net Income $ 12,316 $ 10,562 $ 24,483 $ 19,221
Other comprehensive income:        
Foreign currency translation adjustments 7,098 (7,140) 10,144 (3,581)
Net gain on pension and other postretirement benefits 217 268 434 533
Other comprehensive income (loss) before income tax expense 7,315 (6,872) 10,578 (3,048)
Income tax expense related to items of other comprehensive loss (80) (98) (159) (197)
Other comprehensive income (loss) 7,235 (6,970) 10,419 (3,245)
Comprehensive Income $ 19,551 $ 3,592 $ 34,902 $ 15,976