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Asset Retirement Obligations (Tables)
3 Months Ended
Nov. 24, 2012
Asset Retirement Obligations [Abstract]  
Reconciliation of asset retirement liabilities
A reconciliation of the Company's asset retirement liability is as follows (in thousands):

   
November 24, 2012
 
Beginning balance as of August 25, 2012
 $10,120 
Accretion expense
  166 
Ending balance as of November 24, 2012
 $10,286