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Income Tax Expense (Narrative) (Details)
3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Tax Expense [Line Items]    
Effective Income Tax Rate 26.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Increase in effective tax rate 6.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments  
Estimated Effective Income Tax Rate Continuing Operations 34.00%ese_EstimatedEffectiveIncomeTaxRateContinuingOperations  
Effective Income Tax Rate Reconciliation Foreign Deferred Tax Liability 1.10%ese_EffectiveIncomeTaxRateReconciliationForeignDeferredTaxLiability