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Subsequent Event (Narrative) (Details) (ENOSERV LLC [Member], Subsequent Event [Member], USD $)
In Millions, unless otherwise specified
1 Months Ended
Jan. 28, 2015
ENOSERV LLC [Member] | Subsequent Event [Member]
 
Subsequent Event [Line Items]  
Business Acquisition, Pro Forma Revenue $ 8us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= ese_EnoservLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember