Inventory (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 35,712	$ 35,712		$ 40,533
Work-in-progress	77,150	77,150		34,095
Finished goods	14,917	14,917		6,822
Total	127,779	127,779		$ 81,450
Inventory obsolescence charge	$ 7,600	$ 8,437	$ 0