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Note 11 - Commitments and Contingencies (Tables)
 3 Months Ended
Nov. 26, 2016
Notes Tables  
Schedule of Environmental Liabilities [Table Text Block]
 
 
November
26, 2016
 
Beginning balance as of August 27, 2016
   $
26,748
  
Costs incurred for which reserves had been provided
    
(850
)
Insurance proceeds
   
38
  
Interest accretion
    
150
  
Change in discount rates
    
(1,544
)
         
Balance as of November 26, 2016
   $
24,542
  
Schedule of Environmental Remediation Liabilities [Table Text Block]
(In thousands)
 
201
7
 
 
201
8
 
 
201
9
 
 
20
20
 
 
202
1
 
 
Thereafter
 
 
Total
 
Estimated costs – current dollars
   $
8,824
     $
1,859
     $
1,492
     $
1,284
     $
1,172
     $
12,390
     $
27,021
  
                                                         
Estimated insurance proceeds
    
(135
)
    
(159
)
    
(173
)
    
(159
)
    
(173
)
    
(1,129
)
    
(1,928
)
                                                         
Net anticipated costs
   $
8,689
     $
1,700
     $
1,319
     $
1,125
     $
999
     $
11,261
     $
25,093
  
                                                         
Effect of inflation
    
 
      
 
      
 
      
 
      
 
      
 
      
7,406
  
Effect of discounting
    
 
      
 
      
 
      
 
      
 
      
 
      
(7,957
)
                                                         
Balance as of November 26, 2016
    
 
      
 
      
 
      
 
      
 
      
 
     $
24,542