v3.5.0.2
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