Goodwill and Other Intangible Assets - Amortization of Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	$ 2,554	$ 2,035
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2014	8,202
Expected amortization, 2015	10,784
Expected amortization, 2016	9,928
Expected amortization, 2017	8,726
Expected amortization, 2018	7,860
Expected amortization thereafter	22,137
Total expected amortization expense	67,637		47,197
Patents trademarks and other [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	1,001	919
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2014	2,885
Expected amortization, 2015	3,695
Expected amortization, 2016	2,839
Expected amortization, 2017	2,265
Expected amortization, 2018	1,649
Expected amortization thereafter	2,211
Total expected amortization expense	15,544		15,031
Customer relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	666	505
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2014	2,153
Expected amortization, 2015	2,871
Expected amortization, 2016	2,871
Expected amortization, 2017	2,523
Expected amortization, 2018	2,437
Expected amortization thereafter	6,786
Total expected amortization expense	19,641		18,103
Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	887	524
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Expected amortization, remainder of 2014	3,164
Expected amortization, 2015	4,218
Expected amortization, 2016	4,218
Expected amortization, 2017	3,938
Expected amortization, 2018	3,774
Expected amortization thereafter	13,140
Total expected amortization expense	32,452		14,063
Note issuance costs [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, amortization expense	$ 0	$ 87
Minimum [Member] | Patents trademarks and other [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	2 years
Minimum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	5 years
Minimum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	5 years 6 months
Maximum [Member] | Patents trademarks and other [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	10 years
Maximum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	10 years
Maximum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, useful life	10 years