Schedule Of Reconciliation Of Accrued Restructuring Charges (Detail) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jul. 01, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (1,130,000)	$ 5,900,000	$ 644,000	$ 4,468,000	$ 5,756,000
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance				1,000,000
Restructuring charges				4,800,000
Utilization of restructuring plan				(4,900,000)
Reversal of prior-year restructuring charges		300,000		(300,000)
Ending Balance	600,000			600,000
Accrued Other Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance				1,200,000
Restructuring charges				0
Utilization of restructuring plan				(300,000)
Reversal of prior-year restructuring charges				0
Ending Balance	900,000			900,000
Total Accrued Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Beginning Balance				2,200,000
Restructuring charges				4,800,000
Utilization of restructuring plan				(5,200,000)
Reversal of prior-year restructuring charges				(300,000)
Ending Balance	$ 1,500,000			$ 1,500,000