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INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Chassis	$ 12,457	$ 12,807
Raw materials	17,739	18,725
Work in process	7,829	8,426
Finished goods	9,698	8,282
INVENTORIES TOTAL	$ 47,723	$ 48,240

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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