Schedule Of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012		Dec. 31, 2011
Inventory Net [Abstract]
Raw materials	$ 28,797		$ 26,385
Work-in process	13,847		12,258
Finished goods	59,603	[1]	54,688	[1]
Supplies	570		606
Total inventories	$ 102,817		$ 93,937

[1] (a) Includes consignment inventories held by customers for $6,198 and $5,157 at September 29, 2012 and December 31, 2011, respectively.