Document And Entity Information - shares	9 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Entity Registrant Name	ESCO TECHNOLOGIES INC
Entity Central Index Key	0000866706
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Trading Symbol	ESE
Entity Common Stock, Shares Outstanding		25,716,828