Goodwill and Other Intangible Assets - Amortization of Intangibles (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	$ 1,730	$ 791
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2012	1,728
Expected amortization, 2013	3,298
Expected amortization, 2014	2,798
Expected amortization, 2015	2,670
Expected amortization, 2016	2,463
Expected amortization thereafter	2,390
Total expected amortization expense	15,347
Patents trademarks and other [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Useful Life, Minimum	2
Finite-Lived Intangible Assets, Useful Life, Maximum	15
Finite-Lived Intangible Assets, Amortization Expense	894	616
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2012	892
Expected amortization, 2013	1,827
Expected amortization, 2014	1,473
Expected amortization, 2015	1,345
Expected amortization, 2016	1,138
Expected amortization thereafter	409
Total expected amortization expense	7,084
Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Useful Life, Minimum	5.5
Finite-Lived Intangible Assets, Useful Life, Maximum	7
Finite-Lived Intangible Assets, Amortization Expense	661	0
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2012	662
Expected amortization, 2013	1,325
Expected amortization, 2014	1,325
Expected amortization, 2015	1,325
Expected amortization, 2016	1,325
Expected amortization thereafter	1,981
Total expected amortization expense	7,943
Note issuance costs [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Useful Life	7
Finite-Lived Intangible Assets, Amortization Expense	175	175
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2012	174
Expected amortization, 2013	146
Expected amortization, 2014	0
Expected amortization, 2015	0
Expected amortization, 2016	0
Expected amortization thereafter	0
Total expected amortization expense	$ 320