Property, Plant and Equipment Property, Plant and Equipment (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 801,838		$ 801,838		$ 710,004
Accumulated Depreciation	(382,031)		(382,031)		(357,816)
Property, plant and equipment, net	419,807		419,807		352,188
Depreciation, Depletion and Amortization [Abstract]
Depreciation expense	14,277	11,984	28,021	23,629
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
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,783		15,783		13,403
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	484,969		484,969		446,805
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	6,203		6,203		6,120
Computer Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	41,907		41,907		38,849
Assets in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 140,350		$ 140,350		$ 92,367