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Goodwill (Tables)
6 Months Ended
Jun. 30, 2011
Goodwill (Tables) [Abstract]  
Goodwill by Segment
                 
    June 30,     December 31,  
    2011     2010  
            (as reported)  
    (in millions)  
Rail Group
  $ 122.5     $ 122.5  
Construction Products Group
    68.4       62.4  
Energy Equipment Group
    10.9       10.9  
Railcar Leasing and Management Services Group
    1.8       1.8  
 
           
 
  $ 203.6     $ 197.6