Intangible Assets - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Goodwill, Gross carrying amount	$ 1,557,653	$ 1,478,257
Goodwill, Accumulated Amortization	0	0
Goodwill, Net Carrying Amount	1,557,653	1,478,257	$ 1,385,995
Finite-lived intangible assets, Gross Carrying Amount	975,203	913,956
Finite-lived intangible assets, Accumulated Amortization	(555,301)	(463,207)
Finite-lived intangible assets, Net Carrying Amount	419,902	450,749
Indefinite-lived intangible assets, Carrying Amount	91,191	94,458
Intangible assets, Gross Carrying Amount	1,066,394	1,008,414
Intangible assets, Net Carrying Amount	511,093	545,207	$ 560,082
Trademarks
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Carrying Amount	90,391	92,758
In-process research and development
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Carrying Amount	800	1,700
Developed technology
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	545,982	498,649
Finite-lived intangible assets, Accumulated Amortization	(379,896)	(318,366)
Finite-lived intangible assets, Net Carrying Amount	166,086	180,283
Customer relationships
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	331,643	320,550
Finite-lived intangible assets, Accumulated Amortization	(115,943)	(98,175)
Finite-lived intangible assets, Net Carrying Amount	215,700	222,375
Trademarks
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	57,860	56,794
Finite-lived intangible assets, Accumulated Amortization	(27,106)	(18,648)
Finite-lived intangible assets, Net Carrying Amount	30,754	38,146
In-process research and development
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	23,833	23,428
Finite-lived intangible assets, Accumulated Amortization	(16,471)	(13,483)
Finite-lived intangible assets, Net Carrying Amount	7,362	9,945
Backlog
Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	15,885	14,535
Finite-lived intangible assets, Accumulated Amortization	(15,885)	(14,535)
Finite-lived intangible assets, Net Carrying Amount	$ 0	$ 0