Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			$ 2,030
Restructuring charges	1,114	2,451	3,166	4,668
Cash payments			(2,764)
Non-cash write-offs and other adjustments			33
Accrued expense ending balance	2,593		2,593
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			1,204
Cash payments			(1,365)
Non-cash write-offs and other adjustments			(46)
Accrued expense ending balance	1,097		1,097
Facility
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			489
Restructuring charges			1,354
Cash payments			(691)
Non-cash write-offs and other adjustments			142
Accrued expense ending balance	1,422		1,422
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			542
Cash payments			(708)
Non-cash write-offs and other adjustments			3
Accrued expense ending balance	$ 74		$ 74