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Warranty Obligations - Changes in Warranty Obligations (Detail)
$ in Thousands
9 Months Ended
Oct. 01, 2017
USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]  
Beginning balance $ 4,335
Provisions for warranties issued during the period 2,322
Fulfillment of warranty obligations (2,323)
Foreign exchange rate changes 545
Ending balance $ 4,879