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Guarantees - Activity Related to Product Warranty (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Beginning balance $ 22,908us-gaap_ProductWarrantyAccrual $ 16,482us-gaap_ProductWarrantyAccrual
Charges to operations 22,697us-gaap_ProductWarrantyExpense 21,193us-gaap_ProductWarrantyExpense
Product Warranty Accrual, Payments (10,860)us-gaap_ProductWarrantyAccrualPayments (9,404)us-gaap_ProductWarrantyAccrualPayments
Change in estimate (7,705)us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease [1] (5,363)us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease [1]
Balance at the end of the period $ 27,040us-gaap_ProductWarrantyAccrual $ 22,908us-gaap_ProductWarrantyAccrual
[1] The Company records hardware warranty liabilities based on the latest quality and cost information available as of that date. The changes in estimate shown here are due to changes in overall actual failure rates and the resulting impact of these changes on the Company’s estimate of expected future returns, as well as changes in the estimated cost and the mix of new versus used units related to replacement of failed units.