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INCOME TAXES (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
INCOME TAXES [Abstract]        
Effective income tax rate 33.90% 35.10% 32.70% 35.20%
Income tax expense related to certain compensation     $ 671  
Reversal of a deferred tax asset related to certain share-based compensation expense $ 497   $ 497