Balance Sheet Components - Property Plant and Equipment, Net (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Subject to or Available for Operating Lease [Line Items]
Increase in construction In progress	$ 19,200
Depreciation and Amortization	43,459	$ 46,105	$ 43,100
Property subject to operating lease
Property Subject to or Available for Operating Lease [Line Items]
Property, plant and equipment	397,500	397,000
Accumulated depreciation	$ 77,400	$ 51,900