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Long-Term Debt (Schedule Of Debt Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jul. 31, 2013
Total debt $ 799,284 $ 490,303 $ 796,922
Less: Current maturities 965 806 994
Long-term debt 798,319 489,497 795,928
Fiscal year maturity 2019    
Stated percentage in the debt instrument 6.50%    
Credit Facility Revolver [Member]
     
Total debt 0 0 0
Fiscal year maturity 2016    
Industrial Development Bonds [Member]
     
Total debt 41,200 41,200 41,200
Long-term debt 41,200    
Fiscal year maturity 2020    
Employee Housing Bonds [Member]
     
Total debt 52,575 52,575 52,575
6.50% Notes [Member]
     
Total debt 390,000 390,000 390,000
Long-term debt 390,000    
Fiscal year maturity 2019    
Stated percentage in the debt instrument 6.50%    
Long term debt interest rate   6.50%  
Canyons Obligation [Member]
     
Total debt 309,093 0 306,320
Long-term debt 309,093    
Fiscal year maturity 2063    
Other [Member]
     
Total debt $ 6,416 $ 6,528 $ 6,827
Maximum [Member] | Employee Housing Bonds [Member]
     
Fiscal year maturity, end May 01, 2039    
Maximum [Member] | Other [Member]
     
Fiscal year maturity, end Jul. 31, 2029    
Minimum [Member] | Employee Housing Bonds [Member]
     
Fiscal year maturity, start Jun. 01, 2027    
Minimum [Member] | Other [Member]
     
Fiscal year maturity, start Jul. 31, 2014