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Commitments and Contingencies - Summary of Warranty Accrual Included in Accrued Liabilities (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 02, 2015
Sep. 26, 2014
Oct. 02, 2015
Sep. 26, 2014
Commitments and Contingencies Disclosure [Abstract]        
Balance at beginning of period $ 4,167 $ 3,532 $ 4,242 $ 3,606
Accrual for current period warranties 1,182 2,028 4,215 5,383
Warranty costs incurred (1,448) (1,629) (4,556) (5,058)
Balance at end of period $ 3,901 $ 3,931 $ 3,901 $ 3,931