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Derivative Instruments - Derivative Instruments, Gain (Loss) (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) recognized in current operations $ (439) $ (354) $ 66 $ (665)