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Income Taxes
3 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Income taxes
Income Taxes
 
The effective tax rates for the three months ended December 31, 2014 and 2013 were 28.4% and 29.4%. The decrease in the effective tax rate during the three months ended December 31, 2014 was primarily due to a reduction in the reserve for uncertain tax positions.