Inventories (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Inventory Disclosure [Abstract]
Deferred Costs of Sales, Current	$ 0		$ 14,100
Inventory, Net [Abstract]
Raw materials	27,610		14,546
Work-in-process	218		98
Finished goods	6,500		7,485
Inventory, Gross	34,328		22,129
Less: inventory valuation allowance	(4,233)		(5,317)
Inventories, net	30,095		16,812
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	$ 9,300		11,500
Age of consignment inventory purchased by contract manufacturer	365 days
Age of consignment inventory purchased as a result of forecasted demand	180 days
Inventory Charges, Inventory Valuation, Deposit And Adverse Purchase Commitment Liability	$ 266	$ (40)
Adverse Purchase Commitments	279	$ 576
Inventory for Long-term Contracts or Programs, Gross	$ 8,100		$ 8,700