Balance Sheet Details - Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventory Details [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 34,739	$ 32,993
Inventory, Work in Process, Net of Reserves	19,862	18,764
Inventory, Finished Goods, Net of Reserves	12,234	13,728
Inventory, Net	66,835	65,485
Inventory Valuation Reserves	$ 11,842	$ 10,545