Goodwill and Other Intangible Assets - Amortization of Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	$ 5,125	$ 5,516
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2015	5,197
Expected amortization, 2016	9,554
Expected amortization, 2017	8,541
Expected amortization, 2018	7,322
Expected amortization, 2019	5,855
Thereafter	13,365
Total intangible assets included in other long-term assets	49,834		$ 54,111
Patents, trademarks and other [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	2,040	2,119
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2015	2,011
Expected amortization, 2016	3,181
Expected amortization, 2017	2,744
Expected amortization, 2018	1,951
Expected amortization, 2019	1,658
Thereafter	896
Total intangible assets included in other long-term assets	12,441		12,528
Customer relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	1,332	1,421
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2015	1,383
Expected amortization, 2016	2,766
Expected amortization, 2017	2,419
Expected amortization, 2018	2,404
Expected amortization, 2019	1,868
Thereafter	4,138
Total intangible assets included in other long-term assets	14,978		15,876
Developed technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	1,753	$ 1,976
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2015	1,803
Expected amortization, 2016	3,607
Expected amortization, 2017	3,378
Expected amortization, 2018	2,967
Expected amortization, 2019	2,329
Thereafter	8,331
Total intangible assets included in other long-term assets	$ 22,415		$ 25,707
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
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