Retirement And Other Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Before Adoption Of SFAS 158 Recognition Provision Accrued Benefit Liability	$ 0.7	$ 0.8

Disclosure under FAS 132R, before it was amended by FAS 158, of the accrued benefit liability, if any, as one of the amounts recognized in the balance sheet prior to the adoption of the recognition provisions of FAS 158.

No definition available.

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