Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v2.4.1.9
Income Taxes (Details)
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]        
Effective income tax rate (as a percent) 31.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations 29.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations 30.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 29.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations