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Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2011
Significant Accounting Policies 
Basic And Diluted Earnings Per Common Share
     Three Months Ended
September 30,		      Nine Months Ended
September 30,		  
         2011              2010              2011              2010      
     (In Thousands)  

Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.

      $ 48,909           $ 51,968           $ 67,350           $ 82,074     

Less: Distributed and undistributed earnings attributable to unvested awards

      378           529           557           865     
  

 

 

     

 

 

     

 

 

     

 

 

  

Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.

      48,531           51,439             66,793           81,209     

Basic and diluted net earnings available to common shareholders from discontinued operations

      247           22             191           135     
  

 

 

     

 

 

     

 

 

     

 

 

  

Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.

      $ 48,778           $ 51,461           $ 66,984           $ 81,344     
  

 

 

     

 

 

     

 

 

     

 

 

  

Basic weighted-average common shares outstanding

      45,690           45,526             45,634           45,463     

Effect of dilutive employee and director awards

      109           152             149           176     
  

 

 

     

 

 

     

 

 

     

 

 

  

Diluted weighted-average common shares outstanding

      45,799           45,678             45,783           45,639