Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 164,542	$ 165,858
Amortizable intangible assets, accumulated amortization	(116,698)	(112,616)
Amortizable intangible assets, net carrying amount	47,844	53,242
Non-amortizable intangible assets	13,027	13,027
Gross carrying amount	177,569	178,885
Net carrying amount	60,871	66,269
Patents and Acquired Technologies
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	80,981	82,821
Amortizable intangible assets, accumulated amortization	(67,120)	(66,297)
Amortizable intangible assets, net carrying amount	13,861	16,524
Customer Relationships
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	69,651	67,168
Amortizable intangible assets, accumulated amortization	(41,400)	(36,914)
Amortizable intangible assets, net carrying amount	28,251	30,254
Customer Backlog
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	622	2,644
Amortizable intangible assets, accumulated amortization	(379)	(2,589)
Amortizable intangible assets, net carrying amount	243	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	(1,284)	(882)
Amortizable intangible assets, net carrying amount	1,230	1,632
Trademarks and Trade Names
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	10,774	10,711
Amortizable intangible assets, accumulated amortization	(6,515)	(5,934)
Amortizable intangible assets, net carrying amount	$ 4,259	$ 4,777