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Warranty Obligations - Changes in Warranty Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 28, 2014
Payables and Accruals [Abstract]  
Beginning Balance $ 3,016
Provisions for warranties issued during the period 4,012
Fulfillment of warranty obligations (2,512)
Foreign exchange rate changes (218)
Ending Balance $ 4,298