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INVENTORIES
6 Months Ended
Jun. 30, 2011
INVENTORIES
2. 
INVENTORIES

Inventories are stated at the lower of cost, primarily determined on the first-in, first-out (FIFO) method, or market.  The cost of manufactured inventory includes raw material, labor and overhead.  Inventories consist of the following (in thousands):

   
June 30,
   
December 31,
 
   
2011
   
2010
 
Raw materials and components
  $ 65,154     $ 27,970  
Work in progress
    16,005       4,025  
Finished goods
    100,615       70,371  
Aftermarket parts
    5,042       4,486  
Used trailers
    8,627       3,998  
    $ 195,443     $ 110,850