Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 01, 2016	Dec. 31, 2015
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 164,800	$ 165,858
Amortizable intangible assets, accumulated amortization	(113,807)	(112,616)
Amortizable intangible assets, net carrying amount	50,993	53,242
Non-amortizable intangible assets	13,027	13,027
Gross carrying amount	177,827	178,885
Net carrying amount	64,020	66,269
Patents and Acquired Technologies
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	81,085	82,821
Amortizable intangible assets, accumulated amortization	(66,224)	(66,297)
Amortizable intangible assets, net carrying amount	14,861	16,524
Customer Relationships
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	69,775	67,168
Amortizable intangible assets, accumulated amortization	(39,840)	(36,914)
Amortizable intangible assets, net carrying amount	29,935	30,254
Customer Backlog
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	636	2,644
Amortizable intangible assets, accumulated amortization	(225)	(2,589)
Amortizable intangible assets, net carrying amount	411	55
Non-compete Covenant
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	2,514	2,514
Amortizable intangible assets, accumulated amortization	(1,150)	(882)
Amortizable intangible assets, net carrying amount	1,364	1,632
Trademarks and Trade Names
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	10,790	10,711
Amortizable intangible assets, accumulated amortization	(6,368)	(5,934)
Amortizable intangible assets, net carrying amount	$ 4,422	$ 4,777