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Inventories (Tables)
 12 Months Ended
Aug. 26, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following:
(In thousands)
 
August 26, 2017
 
August 27, 2016
Finished goods
 
$
16,947

 
$
19,129

Work-in-process
 
60,818

 
76,350

Raw materials
 
99,919

 
60,740

Total
 
177,684

 
156,219

LIFO reserve
 
(35,419
)
 
(33,697
)
Total inventories
 
$
142,265

 
$
122,522