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Fair Values Of Financial Instruments (Carrying Amount And Fair Value Of Debt) (Details) (Level 2 [Member], USD $)
In Thousands, unless otherwise specified
Sep. 28, 2013
Carrying Amount [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt $ 912,471
Fair Value [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 888,153
Senior Notes, Net Of Unamortized Original Issue Discount [Member] | Carrying Amount [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 700,000
Senior Notes, Net Of Unamortized Original Issue Discount [Member] | Fair Value [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 675,500
Recovery Zone Facility Bonds [Member] | Carrying Amount [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 99,740
Recovery Zone Facility Bonds [Member] | Fair Value [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 99,740
Real Estate And Equipment Notes Payable [Member] | Carrying Amount [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt 112,731
Real Estate And Equipment Notes Payable [Member] | Fair Value [Member]
 
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Estimated fair value of debt $ 112,913