Other-net - Summary of Other-Net Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Other Income and Expenses [Abstract]
Foreign currency exchange/translation gain	$ 126	$ 629	$ 1,271	$ 1,049
Amortization of intangible assets	(1,359)	(1,408)	(4,001)	(4,278)
Metal consignment fees	(1,640)	(2,140)	(5,158)	(7,009)
Other items	(1,288)	(210)	(1,704)	(608)
Total	$ (4,161)	$ (3,129)	$ (9,592)	$ (10,846)