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Derivatives and Hedging - Summary of Fair Value of Derivative Instruments by Contract Type and Location of Asset and/or Liability on Consolidated Condensed Balance Sheets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other current assets    
Derivatives, Fair Value [Line Items]    
Foreign currency forward contracts, asset derivatives designated as hedging instruments, fair value $ 168 $ 2,660
Foreign currency forward contracts, asset derivatives not designated as hedging instruments, fair value 11 864
Accounts payable and accrued expenses    
Derivatives, Fair Value [Line Items]    
Foreign currency forward contracts, liability derivatives designated as hedging instruments, fair value 194 28
Foreign currency exchange contracts, liability derivatives not designated as hedging instruments, fair value $ 45 $ 57