Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 64,646	$ 63,319
Work-in-process	16,442	19,975
Finished products	13,916	9,205
Total inventories	95,004	92,499
Less reserves	(2,658)	(2,314)
Total inventories, net	$ 92,346	$ 90,185