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Other Income (Expense), Net - Components of Other Income Expense (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Other Income and Expenses [Abstract]    
Foreign currency (loss) gain $ (1,032) $ 1,214
Equity income 629 275
Expected return on pension assets/amortization 3,023 2,492
Other miscellaneous (income) expense (34) 830
Total other income (expense), net $ 2,586 $ 4,811