Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	$ 1,272
Restructuring charges	28	1,362
Cash payments	(491)
Non-cash write-offs and other adjustments	(125)
Accrued expense ending balance	684
Employee Severance
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	585
Restructuring charges	(15)
Cash payments	(256)
Accrued expense ending balance	314
Facility
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	648
Restructuring charges	(96)
Cash payments	(192)
Accrued expense ending balance	360
Depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring charges	125
Non-cash write-offs and other adjustments	(125)
Other Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Accrued expense beginning balance	39
Restructuring charges	14
Cash payments	(43)
Accrued expense ending balance	$ 10