Summary of Restructuring Costs and Other Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,051	$ 2,217
Total acquisition related charges	1,066
Total restructuring costs and other	3,117	2,217
GERMANY
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8	9
Fiscal Year 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,625	2,208
NDS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 418