Actual Cash and Non-Cash Charges of the Restructuring Plan (Detail) (2011 Restructuring Plan, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		23 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	$ 85	$ 974	$ 2,316	$ 5,626
Cumulative Costs for Plan					10,340
Cash Charges (Benefits)
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	(40)	974	1,850	3,735
Cumulative Costs for Plan					7,020
Non-Cash Charges
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	125		466	1,891
Cumulative Costs for Plan					$ 3,320