INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
INVENTORIES [Abstract]
Raw materials	$ 21,146	$ 14,382
Work in process	2,924	1,950
Finished goods	3,097	2,353
Less: reserve for inventory obsolescence	(782)	(451)
Total manufactured goods, net	26,385	18,234
Materials purchased for resale (distribution products)	14,984	9,519
Less: reserve for inventory obsolescence	(391)	(250)
Total materials purchased for resale (distribution products), net	14,593	9,269
Total inventories	$ 40,978	$ 27,503