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PENSION AND OTHER POSTRETIREMENT BENEFITS Narrative (Details) (USD $)
12 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2010
Pension Benefits
     
Defined Benefit Plans and Other Postretirement Benefit Plans      
Accumulated Benefit Obligation $ 35,255,000 $ 25,734,000  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year 1,880,000    
Historical Actual Return 7.40%    
Historical Actual Return Period 10 years    
Actual Rate of Return 1.40%    
Postretirement Health Benefits
     
Defined Benefit Plans and Other Postretirement Benefit Plans      
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year 8.00%    
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate 5.00%    
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate 2019    
401(k) Plan
     
Defined Benefit Plans and Other Postretirement Benefit Plans      
Defined Contribution Plan, Cost Recognized $ 673,000 $ 714,000 $ 660,000