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SHARE-BASED COMPENSATION (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future awards or grants 1,600,000    
Proceeds from exercise of stock options $ 1,064 $ 3,688 $ 9,224
Stock Options [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding options maximum term 10 years    
Total fair value of the shares vested $ 2,500 $ 2,800 $ 3,200
Number of shares granted (in shares) 0 0 0
Restricted Stock [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in dollars per share) $ 36.18    
Performance Shares [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in dollars per share) $ 37.08 $ 53.55 $ 45.20
Employee, vesting period 3 years    
Employee, restriction period 3 years    
Minimum [Member] | Stock Options [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee, vesting period 1 year    
Minimum [Member] | Restricted Stock [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee, vesting period 3 years    
Employee, restriction period 3 years    
Non-employee directors, award vesting period 13 months    
Non-employee directors, award restriction period 13 months    
Maximum [Member] | Stock Options [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee, vesting period 4 years    
Maximum [Member] | Restricted Stock [Member]      
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee, vesting period 4 years    
Employee, restriction period 4 years