Goodwill And Identified Intangible Assets - Identified Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 681,061	$ 678,269
Accumulated Amortization	(251,476)	(139,546)
Net	429,585	538,723
Intangible assets, gross	683,265	681,425
Intangible assets, net	431,789	541,879
Amortization of intangible assets	111,930	31,870	$ 20,624
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	2,204	3,156
Acquired patents / core technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	142,584	140,744
Accumulated Amortization	(113,349)	(96,896)
Net	29,235	43,848
Existing technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	204,394	203,442
Accumulated Amortization	(61,518)	(27,315)
Net	142,876	176,127
Customer contracts and related relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	291,769	291,769
Accumulated Amortization	(68,267)	(14,011)
Net	223,502	277,758
Trademarks/trade name
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	40,083	40,083
Accumulated Amortization	(6,111)	(1,138)
Net	33,972	38,945
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	2,231	2,231
Accumulated Amortization	(2,231)	(186)
Net	$ 0	$ 2,045