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Other Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Apr. 01, 2012
Schedule of Accrued Liabilities [Line Items]    
Balance at beginning of period $ 9,786 $ 8,153
Accruals for warranties issued during the period 1,423 3,776
Adjustments related to pre-existing warranties (929) (260)
Settlements made during the period (3,205) (2,947)
Balance at end of period 7,075 8,722
Balance at beginning of period 26,987 12,742
Deferral of new extended warranty revenue 3,471 2,347
Recognition of extended warranty deferred revenue (1,859) (2,162)
Balance at end of period $ 28,599 $ 12,927