Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	$ 2,030
Restructuring charges	2,051	2,217
Cash payments	(1,532)
Non-cash write-offs and other adjustments	273
Accrued expense ending balance	2,950
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	666
Cash payments	(838)
Non-cash write-offs and other adjustments	(18)
Accrued expense ending balance	1,114
Facility
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	489
Restructuring charges	900
Cash payments	(281)
Non-cash write-offs and other adjustments	355
Accrued expense ending balance	1,591
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	419
Cash payments	(413)
Non-cash write-offs and other adjustments	2
Accrued expense ending balance	$ 245