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Transactions with Vulcan Materials Company (Tables)
12 Months Ended
Sep. 30, 2013
Related Party Transactions [Abstract]  
Revenues from Vulcan Materials Company

(in thousands)      2013       2012       2011  
Transportation   $ 6,867       5,249       3,036  
Real estate     5,153       4,755       4,580  
    $ 12,020       10,004       7,616