Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 7,351	$ 11,047	$ 9,786	$ 8,154
Accruals for warranties issued during the period	3,674	4,118	8,781	13,543
Adjustments related to pre-existing warranties	(524)	1,226	(2,323)	1,369
Settlements made during the period	(2,470)	(3,813)	(8,213)	(10,488)
Balance at end of period	8,031	12,578	8,031	12,578
Balance at beginning of period	34,854	20,754	26,987	12,742
Deferral of new extended warranty revenue	5,586	8,733	17,791	21,015
Recognition of extended warranty deferred revenue	(4,120)	(2,007)	(8,458)	(6,277)
Balance at end of period	$ 36,320	$ 27,480	$ 36,320	$ 27,480