XML 16 R1.htm IDEA: XBRL DOCUMENT v3.22.2.2
DEI Document - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Nov. 30, 2022
Mar. 31, 2022
Entity Information [Line Items]        
Entity Registrant Name IES Holdings, Inc.      
Document Type 10-K      
Document Period End Date Sep. 30, 2022      
Entity File Number 001-13783      
Entity Incorporation, State or Country Code DE      
Document Annual Report true      
Document Transition Report false      
Amendment Flag false      
Entity Central Index Key 0001048268      
Document Fiscal Year Focus 2022      
Document Fiscal Period Focus FY      
Current Fiscal Year End Date --09-30      
Entity Tax Identification Number 76-0542208      
Title of 12(b) Security Common Stock, par value $0.01 per share      
Trading Symbol IESC      
Security Exchange Name NASDAQ      
Entity Filer Category Accelerated Filer      
Entity Address, Address Line One 5433 Westheimer Road      
Entity Address, Address Line Two Suite 500      
Entity Address, City or Town Houston      
Entity Address, State or Province TX      
Entity Address, Postal Zip Code 77056      
City Area Code 713      
Local Phone Number 860-1500      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Shell Company false      
Entity Common Stock, Shares Outstanding     20,224,557  
Documents Incorporated by Reference Certain information contained in the Proxy Statement for the 2023 Annual Meeting of Stockholders of the Registrant to be held on February 23, 2023, is incorporated by reference into Part III of this Annual Report on Form 10-K.      
Entity Public Float       $ 359,700
Goodwill, Acquired During Period   $ 38,632    
Entity Small Business false      
Entity Emerging Growth Company false      
ICFR Auditor Attestation Flag true      
Residential [Member]        
Entity Information [Line Items]        
Goodwill, Acquired During Period   $ 35,151