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INVENTORIES
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
INVENTORIES
3.
INVENTORIES
 
Inventory costs include materials, labor and factory overhead. Inventories are stated at the lower of cost or market, determined on a first-in, first-out basis. Appropriate consideration is given to obsolescence, valuation and other factors in determining net realizable value. Revisions of these estimates could result in the need for adjustments. Inventories, net of reserves, at September 30, 2014 and December 31, 2013 consisted of the following:
 
               
   
September 30,
2014
 
December 31,
2013
 
Chassis
 
$
8,921
 
$
7,665
 
Raw materials
   
26,795
   
25,772
 
Work in process
   
14,844
   
9,915
 
Finished goods
   
15,033
   
10,820
 
   
$
65,593
 
$
54,172