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Commitments and Contingencies - Summary of Warranty Accrual Included in Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 03, 2015
Mar. 28, 2014
Commitments and Contingencies Disclosure [Abstract]    
Balance at beginning of period $ 4,242us-gaap_ProductWarrantyAccrual $ 3,606us-gaap_ProductWarrantyAccrual
Accrual for current period warranties 1,595us-gaap_ProductWarrantyAccrualWarrantiesIssued 1,749us-gaap_ProductWarrantyAccrualWarrantiesIssued
Warranty costs incurred (1,746)us-gaap_StandardProductWarrantyAccrualPayments (1,696)us-gaap_StandardProductWarrantyAccrualPayments
Balance at end of period $ 4,091us-gaap_ProductWarrantyAccrual $ 3,659us-gaap_ProductWarrantyAccrual