Financial Statement Details (Details) (USD $)	3 Months Ended	6 Months Ended
	Jul. 01, 2011	Jul. 01, 2011	Dec. 31, 2010
Inventory:
Finished goods	$ 16,778,000	$ 16,778,000	$ 16,351,000
Work in process	6,238,000	6,238,000	6,896,000
Raw materials and supplies	13,650,000	13,650,000	12,494,000
Total Inventory	36,666,000	36,666,000	35,741,000
Accrued expenses and other current liabilities:
Income taxes payable	5,400,000	5,400,000	14,828,000
Accrued compensation	11,399,000	11,399,000	13,054,000
Other accrued liabilities	30,360,000	30,360,000	26,720,000
Total Accrued Expenses and Other Current Liabilities	47,159,000	47,159,000	54,602,000
Majority owned subsidiary purchased its own common stock publicly traded on a non-U.S. exchange and accounted for as equity transactions	400,000	4,100,000
Difference between the book value and fair value of the stock acquired credited to additional paid-in capital	$ 400,000	$ 400,000