Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 47,290	$ 65,575
Work-in-process	29,230	31,184
Finished products	3,179	3,393
Total inventories	79,699	100,152
Less reserves	(4,075)	(3,187)
Total inventories, net	$ 75,624	$ 96,965