Inventories (Details) (USD $)	Oct. 02, 2011	Dec. 31, 2010
Inventories [Abstract]
Raw materials	$ 41,500,000	$ 34,900,000
Work-in-process	6,100,000	6,400,000
Finished goods	29,200,000	25,800,000
Packaging and supplies	20,700,000	19,400,000
Total inventories	$ 97,525,000	$ 86,464,000