INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
INVENTORIES [Abstract]
Raw materials	$ 24,197	$ 14,382
Work in process	3,000	1,950
Finished goods	3,169	2,353
Less: reserve for inventory obsolescence	(825)	(451)
Total manufactured goods, net	29,541	18,234
Materials purchased for resale (distribution products)	17,732	9,519
Less: reserve for inventory obsolescence	(281)	(250)
Total materials purchased for resale (distribution products), net	17,451	9,269
Total inventories	46,992	27,503
Reserve for Inventory Obsolescence [Member]
Inventory Obsolescence [Roll Forward]
Beginning Balance	701	854
Charged to operations	1,123	1,020
Deductions from reserves	(718)	(1,173)
Ending Balance	$ 1,106	$ 701