Summary of Accrual Activities by Components Related to Company's Restructuring Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			$ 2,030
Restructuring charges	1,528	2,728	4,694	7,396
Cash payments			(4,361)
Non-cash write-offs and other adjustments			(147)
Accrued expense ending balance	2,344		2,344
Restructuring Related Lease
Restructuring Cost and Reserve [Line Items]
Acquired lease obligation			128
Employee Severance
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			1,304
Restructuring charges			2,374
Cash payments			(2,428)
Non-cash write-offs and other adjustments			21
Accrued expense ending balance	1,271		1,271
Facility
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			489
Restructuring charges			1,349
Cash payments			(996)
Non-cash write-offs and other adjustments			21
Accrued expense ending balance	991		991
Facility | Restructuring Related Lease
Restructuring Cost and Reserve [Line Items]
Acquired lease obligation			128
Accelerated Depreciation and Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			66
Non-cash write-offs and other adjustments			(66)
Other Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			237
Restructuring charges			905
Cash payments			(937)
Non-cash write-offs and other adjustments			(123)
Accrued expense ending balance	$ 82		$ 82