INVENTORIES (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
INVENTORIES
Raw materials	$ 48,164,000	$ 46,399,000
Work in process	7,173,000	6,926,000
Finished goods	43,046,000	35,919,000
Inventories	98,383,000	89,244,000
Inventory reserves for obsolescence and other estimated losses	$ 8,100,000	$ 7,700,000