Inventories, net (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of Inventories
Raw materials	$ 65,575	$ 67,773
Work-in-process	31,184	33,643
Finished products	3,393	18,144
Total inventories	100,152	119,560
Less reserves	(3,187)	(2,553)
Total inventories, net	$ 96,965	$ 117,007