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Commitments and Contingencies - Activity Related to Warranty Accrual (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at beginning of period $ 7,769us-gaap_StandardProductWarrantyAccrual $ 6,497us-gaap_StandardProductWarrantyAccrual
Provision 1,250us-gaap_StandardProductWarrantyAccrualWarrantiesIssued 1,133us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Warranty usage (1,445)us-gaap_StandardProductWarrantyAccrualPayments [1] (1,272)us-gaap_StandardProductWarrantyAccrualPayments [1]
Balance at end of period $ 7,574us-gaap_StandardProductWarrantyAccrual $ 6,358us-gaap_StandardProductWarrantyAccrual
[1] Warranty usage includes costs incurred for warranty obligations.