Goodwill and Other Intangible Assets - Amortization of Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	$ 2,035	$ 852
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2013	5,681
Expected amortization, 2014	7,147
Expected amortization, 2015	7,032
Expected amortization, 2016	6,847
Expected amortization, 2017	5,688
Expected amortization thereafter	16,411
Total expected amortization expense	48,806
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	919	427
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2013	2,360
Expected amortization, 2014	2,797
Expected amortization, 2015	2,682
Expected amortization, 2016	2,497
Expected amortization, 2017	1,947
Expected amortization thereafter	3,372
Total expected amortization expense	15,655
Customer relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life, minimum	5
Finite-lived intangible assets, useful life, maximum	10
Finite-lived intangible assets, amortization expense	505	0
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2013	1,615
Expected amortization, 2014	2,153
Expected amortization, 2015	2,153
Expected amortization, 2016	2,153
Expected amortization, 2017	1,806
Expected amortization thereafter	8,153
Total expected amortization expense	18,033
Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life, minimum	5.5
Finite-lived intangible assets, useful life, maximum	10
Finite-lived intangible assets, amortization expense	524	338
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2013	1,648
Expected amortization, 2014	2,197
Expected amortization, 2015	2,197
Expected amortization, 2016	2,197
Expected amortization, 2017	1,935
Expected amortization thereafter	4,886
Total expected amortization expense	15,060
Note issuance costs [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	7
Finite-lived intangible assets, amortization expense	87	87
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2013	58
Expected amortization, 2014	0
Expected amortization, 2015	0
Expected amortization, 2016	0
Expected amortization, 2017	0
Expected amortization thereafter	0
Total expected amortization expense	$ 58