Certain Balance Sheet Components Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 310,753	$ 279,746
Computers and Software, Gross	104,384	98,125
Buildings, furniture, and improvements	135,566	122,680
Land	18,433	17,179
Construction in progress, including purchased equipment	39,946	29,358
Total cost	609,082	547,088
Accumulated depreciation	(408,314)	(370,630)
Property, plant, and equipment, net	$ 200,768	$ 176,458