Property, Plant and Equipment Property, Plant and Equipment (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 848,716		$ 848,716		$ 710,004
Accumulated Depreciation	(397,074)		(397,074)		(357,816)
Property, plant and equipment, net	451,642		451,642		352,188
Depreciation, Depletion and Amortization [Abstract]
Depreciation expense	15,537	12,306	43,558	35,934
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	19,691		19,691		19,691
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	92,935		92,935		92,769
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	17,646		17,646		13,403
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	515,068		515,068		446,805
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	6,373		6,373		6,120
Computer Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	44,892		44,892		38,849
Assets in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 152,111		$ 152,111		$ 92,367