Components of Restructuring and Other Exit Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			12 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Involuntary termination costs	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Contract termination costs	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Contract termination costs	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Other associated exit costs	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Other associated exit costs
Restructuring Cost and Reserve [Line Items]
Total expected to be incurred						$ 11,500	$ 5,500		$ 2,000		$ 4,000
Restructuring and other exit costs	733	112	3,345	(65)	3,304			73		3,231
Cumulative To-Date Expense						$ 8,784	$ 5,480		$ 73		$ 3,231