Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Dec. 31, 2011
Finite-Lived Intangible Assets, Net [Abstract]
Less: accumulated amortization	$ 62,940,000		$ 61,214,000
Finite-lived intangible assets, net	58,790,000		60,516,000
Finite-Lived Intangible Assets [Abstract]
Agregated amortization expense	1,700,000	1,500,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2012	6,700,000
2013	6,300,000
2014	5,700,000
2015	5,400,000
2016	5,200,000
Patents [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	18,905,000		18,905,000
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	102,825,000		102,825,000
Trademarks and Trade Names [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived intangible assets (excluding goodwill)	$ 41,000,000