The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Other Intangible Assets - Intangible Assets (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010	Jan. 02, 2011
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	$ 159,197		$ 159,197		$ 175,829
Finite-Lived Intangible Assets, Accumulated Amortization	(106,295)		(106,295)		(109,041)
Finite-Lived Intangible Assets, Net	52,902		52,902		66,788
Amortization of other intangible assets	6,868	11,700	13,932	16,461
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Future Amortization Expense, Remainder of Fiscal Year			13,273
Future Amortization Expense, Year Two			22,721
Future Amortization Expense, Year Three			16,331
Future Amortization Expense, Year Four			252
Future Amortization Expense, Year Five			186
Future Amortization Expense, after Year Five			139
Finite-Lived Intangible Assets, Future Amortization Expense			52,902
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	28,717		28,717		40,525
Finite-Lived Intangible Assets, Accumulated Amortization	(22,540)		(22,540)		(31,823)
Finite-Lived Intangible Assets, Net	6,177		6,177		8,702
Purchased In-process Research and Development [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	1,000		1,000		1,000
Finite-Lived Intangible Assets, Accumulated Amortization	(111)		(111)		(28)
Finite-Lived Intangible Assets, Net	889		889		972
Project Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	79,160		79,160		79,160
Finite-Lived Intangible Assets, Accumulated Amortization	(33,643)		(33,643)		(22,627)
Finite-Lived Intangible Assets, Net	45,517		45,517		56,533
Patents, trade names and purchased technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	50,320		50,320		55,144
Finite-Lived Intangible Assets, Accumulated Amortization	(50,001)		(50,001)		(54,563)
Finite-Lived Intangible Assets, Net	$ 319		$ 319		$ 581