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Asset Retirement Obligations (Tables)
 12 Months Ended
Aug. 25, 2018
Asset Retirement Obligation Disclosure [Abstract]  
Rollforward of Asset Retirement Liability
A rollforward of the Company’s asset retirement liability is as follows for fiscal 2018 and 2017 (in thousands):
 
 
August 25,
2018

August 26,
2017
Beginning balance
$
13,400

 
$
13,032

Accretion expense
935

 
853

Effect of exchange rate changes
(108
)
 
230

Change in estimate
(559
)
 
(715
)
Ending balance
$
13,668

 
$
13,400