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Note E - Property, Plant and Equipment (Details) - Property, Plant and Equipment (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment $ 538,081 $ 510,442
Land [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 2,496 2,496
Building [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 15 years  
Building [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 39 years 6 months  
Building [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 26,741 26,741
Machinery and Equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 5 years  
Machinery and Equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 20 years  
Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 195,566 179,331
Equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 5 years  
Equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 7 years  
Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 256,389 244,770
Transportation Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 6,913 5,953
Plant, Property and Equipment, Useful Life 5 years  
Office Equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 3 years  
Office Equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 5 years  
Office Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 18,556 16,282
Building Improvements [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 5 years  
Building Improvements [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment, Useful Life 20 years  
Building Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment 26,635 24,917
Construction in Progress [Member]
   
Property, Plant and Equipment [Line Items]    
Plant, Property and Equipment $ 4,785 $ 9,952