Intangible Assets - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Goodwill, Gross carrying amount	$ 1,478,257	$ 1,385,995
Goodwill, Accumulated amortization	0	0
Goodwill, Net carrying amount	1,478,257	1,385,995	$ 1,385,115
Finite-lived intangible assets, Gross Carrying Amount	913,956	786,189
Finite-lived intangible assets, Accumulated amortization	(463,207)	(349,779)
Finite-lived intangible assets, Net carrying amount	450,749	436,410
Indefinite-lived intangible assets, Carrying amount	94,458	123,672
Intangible assets, Gross carrying amount	1,008,414	909,861
Intangible assets, Net carrying amount	545,207	560,082	$ 655,871
Trademarks [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Carrying amount	92,758	121,972
In-Process Research and Development [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Carrying amount	1,700	1,700
Developed Technology [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	498,649	420,928
Finite-lived intangible assets, Accumulated amortization	(318,366)	(239,233)
Finite-lived intangible assets, Net carrying amount	180,283	181,695
Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	320,550	309,112
Finite-lived intangible assets, Accumulated amortization	(98,175)	(77,872)
Finite-lived intangible assets, Net carrying amount	222,375	231,240
Trademarks [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	56,794	20,534
Finite-lived intangible assets, Accumulated amortization	(18,648)	(10,915)
Finite-lived intangible assets, Net carrying amount	38,146	9,619
In-Process Research and Development [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	23,428	22,977
Finite-lived intangible assets, Accumulated amortization	(13,483)	(9,121)
Finite-lived intangible assets, Net carrying amount	9,945	13,856
Backlog [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	14,535	12,638
Finite-lived intangible assets, Accumulated amortization	(14,535)	(12,638)
Finite-lived intangible assets, Net carrying amount	$ 0	$ 0