Accrued Expenses (Detail) (USD $) In Thousands	Jul. 02, 2011	Jan. 01, 2011
Schedule of Accrued Liabilities [Line Items]
Accrued payroll and related expenses	$ 26,913	$ 32,625
Accrued warranty	15,100	14,468
Accrued customer rebates	11,739	18,086
Accrued product liability and workers compensation	10,442	9,711
Advanced customer deposits	10,067	13,357
Accrued agent commission	7,546	7,824
Accrued professional services	6,400	5,944
Other accrued expenses	31,623	23,795
Accrued Liabilities, Current, Total	$ 119,830	$ 125,810