Inventory (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 39,719	$ 39,719	$ 40,533
Work-in-progress	58,620	58,620	34,095
Finished goods	15,926	15,926	6,822
Total	114,265	114,265	$ 81,450
Inventory write-down, obsolescence	16,700	25,100
Inventory write-down, market conditions	$ 15,700	$ 15,700