INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 11,798	$ 12,815
Work-in-process	15,830	12,281
Finished goods	25,619	26,265
Inventories, gross	53,247	51,361
Inventory valuation reserves	(4,540)	(5,073)
Inventories, net	$ 48,707	$ 46,288