Balance Sheet Account Details - Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 28,800	$ 16,100	$ 9,500
Goodwill	337,021	337,028
Gross assets	276,369	276,389
Accumulated amortization	(101,340)	(72,562)
Total	175,029	203,827
Capitalized Software Cost [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 1,000	800	$ 500
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful life (years)	9 years 1 month
Gross assets	$ 112,100	112,100
Accumulated amortization	(57,495)	(49,614)
Total	$ 54,605	62,486
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful life (years)	7 years 10 days
Gross assets	$ 122,389	122,404
Accumulated amortization	(27,561)	(10,960)
Total	$ 94,828	111,444
License agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful life (years)	9 years 10 months 10 days
Gross assets	$ 6,511	6,515
Accumulated amortization	(4,530)	(3,980)
Total	$ 1,981	2,535
Patent and trademark costs
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful life (years)	10 years 9 months
Gross assets	$ 28,740	28,740
Accumulated amortization	(7,624)	(4,917)
Total	$ 21,116	23,823
Software development costs
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful life (years)	5 years
Gross assets	$ 6,629	6,630
Accumulated amortization	(4,130)	(3,091)
Total	$ 2,499	$ 3,539