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. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			$ 1,272
Restructuring charges	(188)	722	(160)	2,085
Cash payments			(541)
Non-cash write-offs and other adjustments			(250)
Accrued expense ending balance	321		321
Employee Severance
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			585
Restructuring charges			(80)
Cash payments			(345)
Accrued expense ending balance	160		160
Facility
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			648
Restructuring charges			(112)
Cash payments			(127)
Non-cash write-offs and other adjustments			(250)
Accrued expense ending balance	159		159
Other Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance			39
Restructuring charges			32
Cash payments			(69)
Accrued expense ending balance	$ 2		$ 2