Balance Sheet Account Detail (Other Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	$ 13,908	$ 13,908
Total finite-lived intangible assets	75,100	75,100
Accumulated amortization	(13,706)	(12,845)
Total	61,394	62,255
Developed technology
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total finite-lived intangible assets	67,600	67,600
Accumulated amortization	(11,331)	(10,657)
Total	56,269	56,943
Customer relationships
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total finite-lived intangible assets	7,500	7,500
Accumulated amortization	(2,375)	(2,188)
Total	5,125	5,312
Other intangible assets, net
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total finite-lived intangible assets	89,008	89,008
Accumulated amortization	(13,706)	(12,845)
Total	75,302	76,163
Trademarks and trade names
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	2,708	2,708
In-process research and development
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	$ 11,200	$ 11,200