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Taxes on Income (Schedule Of Effective Income Tax Rate Reconciliation) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Company's provision for taxes on income varied from the statutory federal income tax rate [Abstract]      
United States income tax statutory rate (in hundredths) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State and local taxes, net of federal benefit (in hundredths) 2.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.80%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Other - net (in hundredths) 0.20%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Effective income tax rate (in hundredths) 37.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations 37.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations 37.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations