Segment and Related Information (Operations by Geographic Area) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Dec. 31, 2010	Oct. 03, 2010	Jul. 04, 2010	Apr. 04, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 251,700,000	$ 262,200,000	$ 268,400,000	$ 262,500,000	$ 243,300,000	$ 249,800,000	$ 255,800,000	$ 253,500,000	$ 1,044,853,000	$ 1,002,354,000	$ 907,321,000
Long-lived assets	386,200,000				404,100,000				386,200,000	404,100,000	432,200,000
Portion of consolidated net sales that no individual foreign country's sales exceed (in hundredths)									10.00%
Portion of consolidated long-lived assets that no individual foreign country's long-lived assets exceed (in hundredths)	10.00%								10.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									557,500,000	534,300,000	478,400,000
Long-lived assets	239,800,000				239,900,000				239,800,000	239,900,000	253,500,000
Canada/Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									74,300,000	68,900,000	60,200,000
Long-lived assets	14,600,000				14,900,000				14,600,000	14,900,000	13,500,000
Europe/Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									298,400,000	288,400,000	283,900,000
Long-lived assets	72,000,000				89,900,000				72,000,000	89,900,000	105,700,000
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									114,700,000	110,800,000	84,800,000
Long-lived assets	59,800,000				59,400,000				59,800,000	59,400,000	59,500,000
Total International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									487,400,000	468,100,000	428,900,000
Long-lived assets	$ 146,400,000				$ 164,200,000				$ 146,400,000	$ 164,200,000	$ 178,700,000