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Inventories
3 Months Ended
Mar. 31, 2013
Inventories [Abstract]  
Inventories
Note 4.  Inventories
Inventories consist of the following (in thousands):

   
March 31,
2013
  
December 31,
2012
 
Raw materials and parts
 $137,384  $129,676 
Work-in-process
  78,508   76,052 
Finished goods
  83,937   81,000 
Used equipment
  22,178   21,894 
Total
 $322,007  $308,622