Certain Balance Sheet Components Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net [Abstract]
Machinery and equipment	$ 310,855	$ 310,753
Computers and software	110,758	104,384
Buildings, furniture, and improvements	145,893	135,566
Land	15,457	18,433
Construction in progress, including purchased equipment	45,370	39,946
Total cost	628,333	609,082
Accumulated depreciation	(404,898)	(408,314)
Property, plant, and equipment, net	$ 223,435	$ 200,768