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Other Current Assets (Tables)
9 Months Ended
Sep. 30, 2011
Other Current Assets [Abstract] 
Other Current Assets
     September 30,
2011		      December 31,
2010		  

Deposits in trusts for employee benefits and retirement plans

    $ 84,785       $ 82,335   

Other

      56,378         59,126   
  

 

 

     

 

 

  
   $ 141,163       $ 141,461