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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Sep. 30, 2011
FAIR VALUE MEASUREMENTS [Abstract] 
Fair Value of Assets and Liabilities Measured on a Recurring Basis
As of September 30, 2011, the fair values of the Company's assets and liabilities measured on a recurring basis are categorized as follows:

   
Level 1
  
Level 2
  
Level 3
  
Total
 
Assets:
            
   Short term investments
 $1,391   -   -  $1,391 
   Trading securities
  13,426   -   -   13,426 
Total assets at fair value
 $14,817   -   -  $14,817 
                  
Liabilities:
                
   Derivatives (1)
  -  $7,161   -  $7,161 
Total liabilities at fair value
  -  $7,161   -  $7,161 
                  
(1) Interest rate swaps are valued based on observable market swap rates and are classified within Level 2 of the fair value hierarchy.