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Accumulated Other Comprehensive Income
12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Accumulated Other Comprehensive Income

14  Accumulated Other Comprehensive Income

The components of accumulated other comprehensive income are detailed as follows (in thousands):

Currency TranslationUnrealized Gain (Loss) on Retirement PlansUnrealized Gain (Loss) on InvestmentsAccumulated Other Comprehensive Income (Loss)
Balance at December 31, 2016$(170,566)$(43,894)$(1,820)$(216,280)
Other comprehensive income (loss), net of tax101,1486,791(1,726)106,213
Balance at December 31, 2017$(69,418)$(37,103)$(3,546)$(110,067)