Balance Sheet Details Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance Sheet Details [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 32,993	$ 39,022
Inventory, Work in Process, Net of Reserves	18,764	18,918
Inventory, Finished Goods, Net of Reserves	13,728	13,550
Inventory, Net	65,485	71,490
Inventory Valuation Reserves	10,545	8,896
Inventory Write-down	2,953	3,676
Inventory Disposal	$ 1,304	$ 1,780