Retirement and Other Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Before Adoption Of SFAS 158 Recognition Provision Accrued Benefit Liability	$ 0.9	$ 0.9

Defined Benefit Plan Before Adoption Of Sfas 158 Recognition Provision Accrued Benefit Liability

No definition available.

Name:	ese_DefinedBenefitPlanBeforeAdoptionOfSfas158RecognitionProvisionAccruedBenefitLiability
Namespace Prefix:	ese_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant