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Income Taxes (Details Textual)
3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Taxes (Textual) [Abstract]        
Effective income tax rate 29.80% 34.70% 33.10% 35.20%