IES (IESC) 10-Q 29 Apr 22 2022 Q2 Quarterly report Financial data

DEI Document

DEI Document - shares	6 Months Ended
	Mar. 31, 2022	Apr. 27, 2022
Entity Information [Line Items]
Entity File Number	001-13783
Entity Registrant Name	IES Holdings, Inc.
Document Period End Date	Mar. 31, 2022
Document Quarterly Report	true
Document Transition Report	false
Entity Central Index Key	0001048268
Entity Incorporation, State or Country Code	DE
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
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 Common Stock, Shares Outstanding		20,787,896

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 19,279	$ 23,105
Accounts receivable	309,445	286,707
Accounts and Other Receivables, Net, Current	49,957	41,341
Inventories	85,899	68,573
Costs and estimated earnings in excess of billings	55,517	43,389
Prepaid expenses and other current assets	15,958	21,065
Total current assets	536,055	484,180
Property and equipment, net	52,068	35,454
Goodwill	92,395	92,395
Intangible assets, net	78,694	85,619
Deferred tax assets	17,380	19,009
Operating right of use assets	43,734	42,916
Other non-current assets	10,913	7,049
Total assets	831,239	766,622
Accounts payable and accrued expenses	283,684	249,114
Billings in excess of costs and estimated earnings	63,619	62,486
Total current liabilities	347,303	311,600
Long-term debt	69,498	39,746
Operating long-term lease liabilities	28,370	28,649
Other non-current liabilities	10,562	16,080
Total liabilities	455,733	396,075
Noncontrolling interest	24,458	24,594
Preferred stock, value	0	0
Common stock, value	220	220
Treasury stock, value	(30,587)	(29,300)
Additional paid-in capital	200,159	201,899
Retained earnings	181,256	173,134
Total stockholders' equity	351,048	345,953
Total liabilities and stockholders' equity	$ 831,239	$ 766,622

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ (4,045)	$ (2,387)
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	22,049,529	22,049,529
Common Stock, Shares, Outstanding	20,785,498	20,732,531
Treasury Stock, Shares	1,264,031	1,316,998

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 501,593	$ 331,961	$ 982,102	$ 646,799
Cost of services	443,086	267,087	843,868	523,246
Gross profit	58,507	64,874	138,234	123,553
Selling, general and administrative expenses	63,430	47,655	122,832	90,441
Contingent consideration	69		138	73
Loss (gain) on sale of assets	(68)	(18)	(73)	8
Operating income (loss)	(4,924)	17,128	15,337	33,031
Interest expense	543	225	979	397
Other (income) expense, net	(124)	(51)	641	(169)
Income (loss) from operations before income taxes	(5,343)	16,954	13,717	32,803
Provision for (benefit from) income taxes	(1,293)	3,611	2,688	7,250
Net income (loss)	(4,050)	13,343	11,029	25,553
Net income attributable to noncontrolling interest	(1,362)	(507)	(1,977)	(619)
Comprehensive income attributable to IES Holdings, Inc.	$ (5,412)	$ 12,836	$ 9,052	$ 24,934
Earnings Per Share, Basic	$ (0.30)	$ 0.59	$ 0.39	$ 1.18
Earnings Per Share, Diluted	$ (0.30)	$ 0.58	$ 0.38	$ 1.16
Weighted Average Number of Shares Outstanding, Basic	20,772,426	20,780,006	20,737,253	20,756,879
Weighted Average Number of Shares Outstanding, Diluted	20,772,426	21,071,059	21,139,429	21,059,088

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment
Stockholders' Equity Attributable to Parent at Sep. 30, 2020	$ 283,313		$ 220	$ (24,499)	$ 200,587	$ 107,005
Shares, Issued at Sep. 30, 2020			22,049,529	1,287,134
Issuances under compensation plans				$ (2,086)	(2,086)
Issuances under compensation plans, shares				107,327
Acquisition of treasury stock				$ (1,226)	531	(695)
Acquisition of treasury stock, shares				(30,878)
Non-cash compensation	1,700				1,700
Noncontrolling Interest, Change in Redemption Value	(503)					(503)
Net income (loss) attributable to IES Holdings, Inc.	(24,934)					(24,934)
Stockholders' Equity Attributable to Parent at Mar. 31, 2021	308,535	$ 214	$ 220	$ (23,639)	200,732	131,222	$ 214
Shares, Issued at Mar. 31, 2021			22,049,529	1,210,685
Stockholders' Equity Attributable to Parent at Dec. 31, 2020	295,462		$ 220	$ (24,984)	201,219	119,007
Shares, Issued at Dec. 31, 2020			22,049,529	1,279,545
Issuances under compensation plans				$ (1,345)	(1,345)
Issuances under compensation plans, shares				68,860
Non-cash compensation	858				858
Noncontrolling Interest, Change in Redemption Value	(621)					(621)
Net income (loss) attributable to IES Holdings, Inc.	(12,836)					(12,836)
Stockholders' Equity Attributable to Parent at Mar. 31, 2021	308,535	$ 214	$ 220	$ (23,639)	200,732	131,222	$ 214
Shares, Issued at Mar. 31, 2021			22,049,529	1,210,685
Stockholders' Equity Attributable to Parent at Sep. 30, 2021	345,953		$ 220	$ (29,300)	201,899	173,134
Shares, Issued at Sep. 30, 2021			22,049,529	1,316,998
Issuances under compensation plans				$ (3,638)	(3,638)
Issuances under compensation plans, shares				157,167
Acquisition of treasury stock				$ (4,925)		(4,925)
Acquisition of treasury stock, shares				(104,200)
Non-cash compensation	1,898				1,898
Noncontrolling Interest, Change in Redemption Value	(930)					(930)
Net income (loss) attributable to IES Holdings, Inc.	(9,052)
Stockholders' Equity Attributable to Parent at Mar. 31, 2022	351,048		$ 220	$ (30,587)	200,159	181,256
Shares, Issued at Mar. 31, 2022			22,049,529	1,264,031
Stockholders' Equity Attributable to Parent at Dec. 31, 2021	356,460		$ 220	$ (30,460)	199,162	187,538
Shares, Issued at Dec. 31, 2021			22,049,529	1,261,444
Acquisition of treasury stock	(127)			$ (127)	0
Acquisition of treasury stock, shares				(2,587)
Non-cash compensation	997				997
Noncontrolling Interest, Change in Redemption Value	(870)					(870)
Net income (loss) attributable to IES Holdings, Inc.	5,412					(5,412)
Stockholders' Equity Attributable to Parent at Mar. 31, 2022	$ 351,048		$ 220	$ (30,587)	$ 200,159	$ 181,256
Shares, Issued at Mar. 31, 2022			22,049,529	1,264,031

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Cash Flows [Abstract]
Net income (loss)	$ 11,029	$ 25,553
Bad debt expense	92	61
Deferred financing cost amortization	88	94
Depreciation and amortization	12,370	9,848
Loss (gain) on sale of assets	(73)	8
Non-cash compensation expense	1,898	1,700
Deferred income taxes	1,931	5,433
Accounts receivable	(22,830)	11,943
Inventories	(17,325)	(9,771)
Costs and estimated earnings in excess of billings	(12,128)	5,699
Prepaid expenses and other current assets	(3,795)	1,053
Other non-current assets	(1,968)	(83)
Accounts payable and accrued expenses	26,911	(9,324)
Billings in excess of costs and estimated earnings	1,134	4,518
Other non-current liabilities	(242)	1,626
Net cash provided by operating activities	(2,908)	48,358
Purchases of property and equipment	(21,627)	(3,004)
Proceeds from sale of assets	199	68
Cash paid in conjunction with business combinations	(500)	(55,468)
Net cash used in investing activities	(21,928)	(58,404)
Borrowings of debt	872,609	584,483
Repayments of debt	(842,727)	(584,495)
Cash paid for finance leases	(603)	(240)
Distribution to noncontrolling interest	(3,344)	(251)
Purchase of treasury stock	(4,925)	(695)
Net cash used in financing activities	21,010	(1,198)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(3,826)	(11,244)
CASH, CASH EQUIVALENTS, beginning of period		53,577
CASH, CASH EQUIVALENTS, end of period	19,279	42,333
Cash paid for interest	949	262
Cash paid for income taxes (net)	$ 2,142	$ 2,182

Business

Business	6 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Business Description and Basis of Presentation [Text Block]	1. BUSINESS AND ACCOUNTING POLICIES Description of the Business IES Holdings, Inc. designs and installs integrated electrical and technology systems and provides infrastructure products and services to a variety of end-markets, including data centers, residential housing and commercial and industrial facilities. Our operations are organized into four principal business segments, based upon the nature of our services: • Communications – Nationwide provider of technology infrastructure services, including the design, build, and maintenance of the communications infrastructure within data centers for co-location and managed hosting customers, for both large corporations and independent businesses. • Residential – Regional provider of electrical installation services for single-family housing and multi-family apartment complexes, as well as heating, ventilation and air conditioning (HVAC) and plumbing installation services in certain markets. • Infrastructure Solutions – Provider of electro-mechanical solutions for industrial operations, including apparatus repair and custom-engineered products such as generator enclosures to be used in data centers and other industrial applications. • Commercial & Industrial – Provider of electrical and mechanical design, construction, and maintenance services to the commercial and industrial markets in various regional markets and nationwide in certain areas of expertise, such as the power infrastructure market and data centers. The words “IES”, the “Company”, “we”, “our”, and “us” refer to IES Holdings, Inc. and, except as otherwise specified herein, to our consolidated subsidiaries. Seasonality and Quarterly Fluctuations Results of operations from our Residential segment can be seasonal, depending on weather trends, with typically higher revenues generated during spring and summer and lower revenues generated during fall and winter. The Commercial & Industrial, Communications and Infrastructure Solutions segments of our business are less subject to seasonal trends, as work in these segments generally is performed inside structures protected from the weather, although weather can still impact these businesses, especially in the early stages of projects. From quarter to quarter, results for our Communications, Residential, and Commercial & Industrial segments may be materially affected by the timing of new construction projects, and our volume of business may be adversely affected by declines in construction projects resulting from adverse regional or national economic conditions. Quarterly results for our Infrastructure Solutions segment may be affected by the timing of outages or capital projects at our customers’ facilities. Accordingly, operating results for any fiscal period are not necessarily indicative of results that may be achieved for any subsequent fiscal period. Basis of Financial Statement Preparation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of IES, our wholly-owned subsidiaries, and entities that we control due to ownership of a majority of voting interest and have been prepared in accordance with the instructions to interim financial reporting as prescribed by the United States Securities and Exchange Commission (the “SEC”). The results for the interim periods are not necessarily indicative of results for the entire year. These interim financial statements do not include all disclosures required by U.S. generally accepted accounting principles (“GAAP”) and should be read in conjunction with the consolidated financial statements and notes thereto filed with the SEC in our Annual Report on Form 10-K for the fiscal year ended September 30, 2021. In the opinion of management, the unaudited Condensed Consolidated Financial Statements contained in this report include all known accruals and adjustments necessary for a fair presentation of the financial position, results of operations, and cash flows for the periods reported herein. Any such adjustments are of a normal recurring nature. Noncontrolling Interest In connection with our acquisitions of Edmonson Electric, LLC (“Edmonson”) and Bayonet Plumbing, Heating & Air-Conditioning, LLC (“Bayonet”) in fiscal 2021, and NEXT Electric, LLC in fiscal 2017, we acquired an 80 percent interest in each of the entities, with the remaining 20 percent interest in each such entity being retained by the respective third party seller. The interests retained by those third party sellers are identified on our Condensed Consolidated Balance Sheets as noncontrolling interest, classified outside of permanent equity. Under the terms of each entity’s operating agreement, after five years from the date of the acquisition, we may elect to purchase, or the third-party seller may require us to purchase, part or all of the remaining 20 percent interest in the applicable entity. The purchase price is variable, based on a multiple of earnings as defined in the operating agreements. Therefore, this noncontrolling interest is carried at the greater of the balance determined under Accounting Standards Codification (“ASC”) 810 and the redemption amounts assuming the noncontrolling interests were redeemable at the balance sheet date. If all of the noncontrolling interests remaining outstanding at March 31, 2022 had been redeemable at that date, the redemption amount would have been $21,942. Use of Estimates The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities, disclosures of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Estimates are primarily used in our revenue recognition of construction in progress, fair value assumptions in accounting for business combinations and analyzing goodwill, investments, intangible assets and long-lived asset impairments and adjustments, allowance for credit losses, stock-based compensation, reserves for legal matters, realizability of deferred tax assets, unrecognized tax benefits and self-insured claims liabilities and related reserves. Other (Income) Expense, Net Other (Income) Expense, Net includes primarily unrealized gains or losses on equity securities, including those related to our Executive Deferred Compensation Plan. These securities are recorded at fair value (Level 1) at the end of each reporting period. Please refer to Note 9 - Fair Value Measurements for further information. Accounting Standards Recently Adopted In December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” This standard simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in Topic 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The standard also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. This update is effective for fiscal years beginning after December 15, 2020 and for interim periods within that year. Early adoption is permitted. We adopted this standard on October 1, 2021 with immaterial impact on our Condensed Consolidated Financial Statements.

Controlling Shareholder

Controlling Shareholder	6 Months Ended
	Mar. 31, 2022
Risks and Uncertainties [Abstract]
Controlling Shareholder [Text Block]	2. CONTROLLING STOCKHOLDER Tontine Associates, L.L.C. ("Tontine Associates"), together with its affiliates (collectively, “Tontine”), is the Company’s controlling stockholder, owning approximately 56 percent of the Company’s outstanding common stock based on the Form 4 filed by Tontine with the SEC on December 3, 2021 and the Company's shares outstanding as of April 27, 2022 . Accordingly, Tontine has the ability to exercise significant control over our affairs, including the election of directors and most actions requiring the approval of stockholders. While Tontine is subject to certain restrictions under federal securities laws on sales of its shares as an affiliate, the Company has filed a shelf registration statement to register all of the shares of IES common stock owned by Tontine at the time of registration. As long as the shelf registration statement remains effective and the Company remains eligible to use it, Tontine has the ability to resell any or all of its registered shares from time to time in one or more offerings, as described in the shelf registration statement and in any prospectus supplement filed in connection with an offering pursuant to the shelf registration statement. Should Tontine sell or otherwise dispose of all or a portion of its position in IES, a change in ownership of IES could occur. A change in ownership, as defined by Internal Revenue Code Section 382, could reduce the availability of the Company’s net operating loss carryforwards for federal and state income tax purposes. Furthermore, a change of control would trigger the change of control provisions in a number of our material agreements, including our credit agreement, bonding agreements with our sureties and our executive severance plan. Jeffrey L. Gendell was appointed as Chief Executive Officer of the Company effective October 1, 2020, having served as the Company's Interim Chief Executive Officer since July 31, 2020. Mr. Gendell also serves as Chairman of the Board of Directors, a position he has held since November 2016. He is the managing member and founder of Tontine, and the brother of David B. Gendell, who has served as a member of our Board since February 2012, and who previously served as Interim Director of Operations from November 2017 to January 2019, as Vice Chairman of the Board from November 2016 to November 2017 and as Chairman of the Board from January 2015 to November 2016. David B. Gendell was an employee of Tontine from 2004 until December 31, 2017. The Company is party to a sublease agreement with Tontine Associates for corporate office space in Greenwich, Connecticut. The sublease extends through February 27, 2023, with monthly payments due in the amount of approximately $8. Payments by the Company are at a rate consistent with that paid by Tontine Associates to its landlord. On December 6, 2018, the Company entered into a Board Observer Letter Agreement (the "Observer Agreement") with Tontine

Revenue Recognition

Revenue Recognition	6 Months Ended
	Mar. 31, 2022
Revenue Recognition and Deferred Revenue [Abstract]
Revenue from External Customers by Products and Services [Table Text Block]	3. REVENUE RECOGNITION Contracts Our revenue is derived from contracts with customers, and we determine the appropriate accounting treatment for each contract at its inception. Our contracts primarily relate to electrical and mechanical contracting services, technology infrastructure products and services, and electro-mechanical solutions for industrial operations. Revenue is earned based upon an agreed fixed price or actual costs incurred plus an agreed upon percentage. We account for a contract when: (i) it has approval and commitment from both parties, (ii) the rights of the parties are identified, (iii) payment terms are identified, (iv) the contract has commercial substance, and (v) collectability of consideration is probable. We consider the start of a project to be when the above criteria have been met and we have written authorization from the customer to proceed. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. We recognize revenue over time for the majority of the services we perform as (i) control continuously transfers to the customer as work progresses at a project location controlled by the customer and (ii) we have the right to bill the customer as costs are incurred. Within our Infrastructure Solutions segment, we often perform work inside our own facilities, where control does not continuously transfer to the customer as work progresses. In such cases, we evaluate whether we have the right to bill the customer as costs are incurred. Such assessment involves an evaluation of contractual termination clauses. Where we have a contractual right to payment for work performed to date, we recognize revenue over time. If we do not have such a right, we recognize revenue upon completion of the contract, when control of the work transfers to the customer. For fixed price arrangements, we use the percentage of completion method of accounting under which revenue recognized is measured principally by the costs incurred and accrued to date for each contract as a percentage of the estimated total cost for each contract at completion. Contract costs include all direct material, labor and indirect costs related to contract performance. Changes in job performance, job conditions, estimated contract costs and profitability and final contract settlements may result in revisions to costs and income, and the effects of these revisions are recognized in the period in which the revisions are determined. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. This measurement and comparison process requires updates to the estimate of total costs to complete the contract, and these updates may include subjective assessments and judgments. Variable Consideration The transaction price for our contracts may include variable consideration, which includes changes to transaction price for approved and unapproved change orders, claims and incentives. Change orders, claims, and incentives are generally not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as a modification of the existing contract and performance obligation. We estimate variable consideration for a performance obligation at the probability weighted value we expect to receive (or the most probable amount we expect to incur in the case of liquidated damages, if any), utilizing estimation methods that best predict the amount of consideration to which we will be entitled (or which will be incurred in the case of liquidated damages, if any). We include variable consideration in the estimated transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur or when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. The effect of variable consideration on the transaction price of a performance obligation is recognized as an adjustment to revenue on a cumulative catch-up basis. To the extent unapproved change orders and claims reflected in transaction price (or accounted for as a reduction of the transaction price in the case of liquidated damages) are not resolved in our favor, or to the extent incentives reflected in transaction price are not earned, there could be reductions in, or reversals of, previously recognized revenue. Disaggregation of Revenue We disaggregate our revenue from contracts with customers by activity and contract type, as these categories reflect how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Our consolidated revenue for the three and six months ended March 31, 2022 and 2021 was derived from the following activities. See details in the following tables: Three Months Ended March 31, Six Months Ended March 31, 2022 2021 2022 2021 Communications $ 130,639 $ 94,886 $ 258,028 $ 193,242 Residential Single-family 192,368 100,476 365,896 172,602 Multi-family and Other 68,038 49,860 136,286 97,225 Total Residential 260,406 150,336 502,182 269,827 Infrastructure Solutions Industrial Services 15,837 10,548 30,653 20,588 Custom Power Solutions 25,896 24,168 53,176 48,529 Total Infrastructure Solutions 41,733 34,716 83,829 69,117 Commercial & Industrial 68,815 52,023 $ 138,063 $ 114,613 Total Revenue $ 501,593 $ 331,961 $ 982,102 $ 646,799 Three Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 85,722 $ 260,406 $ 39,924 $ 64,346 $ 450,398 Time-and-material 44,917 — 1,809 4,469 51,195 Total revenue $ 130,639 $ 260,406 $ 41,733 $ 68,815 $ 501,593 Three Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 68,551 $ 150,336 $ 32,959 $ 49,003 $ 300,849 Time-and-material 26,335 — 1,757 3,020 31,112 Total revenue $ 94,886 $ 150,336 $ 34,716 $ 52,023 $ 331,961 Six Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 174,144 $ 502,182 $ 80,377 $ 129,206 $ 885,909 Time-and-material 83,884 — 3,452 8,857 96,193 Total revenue $ 258,028 $ 502,182 $ 83,829 $ 138,063 $ 982,102 Six Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 144,565 $ 269,827 $ 65,623 $ 109,690 $ 589,705 Time-and-material 48,677 — 3,494 4,923 57,094 Total revenue $ 193,242 $ 269,827 $ 69,117 $ 114,613 $ 646,799 Accounts Receivable and Allowance for Credit Losses Accounts receivable include amounts that we have billed or have an unconditional right to bill our customers. As of March 31, 2022, Accounts receivable included $21,824 of unbilled receivables for which we have an unconditional right to bill. In calculating our expected credit losses, we considered trade receivables, retainage, and costs and estimated earnings in excess of billings, all of which constitute a homogenous portfolio, and therefore, to measure the expected credit loss, they have been grouped together. We have elected to calculate an expected credit loss based on loss rates from historical data. Each segment groups financial assets with similar risk characteristics and collectively assesses the expected credit losses. If an individual asset experiences credit deterioration to the extent the credit risk is no longer characteristic of the other assets in the group, it will be analyzed individually. The loss rates for our portfolios include our history of credit loss expense, the aging of our receivables, our expectation of payments and adjustment for forward-looking factors specific to the macroeconomic trends in the markets we serve. Other than trade receivables due in one year or less, we do not have any other financial assets that are past due or are on non-accrual status. Contract Assets and Liabilities Project contracts typically provide for a schedule of billings on percentage of completion of specific tasks inherent in the fulfillment of our performance obligation(s). The schedules for such billings usually do not precisely match the schedule on which costs are incurred. As a result, contract revenue recognized in the statement of operations can and usually does differ from amounts that can be billed to the customer at any point during the contract. Amounts by which cumulative contract revenue recognized on a contract as of a given date exceeds cumulative billings and unbilled receivables to the customer under the contract are reflected as a current asset in our Condensed Consolidated Balance Sheet under the caption “Costs and estimated earnings in excess of billings”. Amounts by which cumulative billings to the customer under a contract as of a given date exceed cumulative contract revenue recognized are reflected as a current liability in our Condensed Consolidated Balance Sheet under the caption “Billings in excess of costs and estimated earnings”. During the three months ended March 31, 2022 and 2021, we recognized revenue of $38,349 and $28,385 related to our contract liabilities at January 1, 2022 and 2021, respectively. During the six months ended March 31, 2022 and 2021, we recognized revenue of $45,115 and $33,740 related to our contract liabilities at October 1, 2021 and 2020, respectively. Remaining Performance Obligations Remaining performance obligations represent the unrecognized revenue value of our contract commitments. New awards represent the total expected revenue value of new contract commitments undertaken during a given period, as well as additions to the scope of existing contract commitments. Our new performance obligations vary significantly each reporting period based on the timing of our major new contract commitments. At March 31, 2022, we had remaining performance obligations of $835,548. The Company expects to recognize revenue on approximately $792,953 of the remaining performance obligations over the next 12 months, with the remainder recognized thereafter. For the three and six months ended March 31, 2022, net revenue recognized from our performance obligations satisfied in previous periods was not material.

Debt

Debt	6 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	4. DEBT At March 31, 2022 and September 30, 2021, we had $70,220 and $40,339, respectively, in borrowings outstanding under our revolving credit facility with Wells Fargo Bank, N.A. ("Wells Fargo"), and long-term debt related to loans on capital expenditures of $15 and $63, respectively. At March 31, 2022, we also had $4,161 in outstanding letters of credit and total availability of $50,619 under our revolving credit facility without triggering our financial covenants under our Second Amended and Restated Credit and Security Agreement with Wells Fargo (as amended, the "Credit Agreement"). As of March 31, 2022, the Company was in compliance with the financial covenants under the Credit Agreement. On April 28, 2022 we entered into the Third Amended and Restated Credit and Security Agreement with Wells Fargo (the "Amended Credit Agreement"), which, among other things, increased our maximum borrowing amount from $125,000 to $150,000. Please refer to Note 15 - Subsequent Events for further information regarding the Amended Credit Agreement.

Per Share Information

Per Share Information	6 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	5. PER SHARE INFORMATION The following tables reconcile the components of basic and diluted earnings (loss) per share for the three and six months ended March 31, 2022 and 2021: Three Months Ended March 31, 2022 2021 Numerator: Net income (loss) attributable to IES Holdings, Inc. $ (5,412) $ 12,836 Increase in noncontrolling interest 870 621 Net income attributable to restricted stockholders of IES Holdings, Inc. — 8 Net income (loss) attributable to common stockholders of IES Holdings, Inc. $ (6,282) $ 12,207 Denominator: Weighted average common shares outstanding — basic 20,772,426 20,780,006 Effect of dilutive stock options and non-vested securities 0 291,053 Weighted average common and common equivalent shares outstanding — diluted 20,772,426 21,071,059 Earnings (loss) per share attributable to common stockholders of IES Holdings, Inc.: Basic $ (0.30) $ 0.59 Diluted $ (0.30) $ 0.58 Six Months Ended March 31, 2022 2021 Numerator: Net income attributable to IES Holdings, Inc. $ 9,052 $ 24,934 Increase in noncontrolling interest 930 503 Net income attributable to restricted stockholders of IES Holdings, Inc. 6 20 Net income attributable to common stockholders of IES Holdings, Inc. $ 8,116 $ 24,411 Denominator: Weighted average common shares outstanding — basic 20,737,253 20,756,879 Effect of dilutive stock options and non-vested securities 402,176 302,209 Weighted average common and common equivalent shares outstanding — diluted 21,139,429 21,059,088 Earnings per share attributable to common stockholders of IES Holdings, Inc.: Basic $ 0.39 $ 1.18 Diluted $ 0.38 $ 1.16

Operating Segments

Operating Segments	6 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	6. OPERATING SEGMENTS We manage and measure performance of our business in four distinct operating segments: Communications, Residential, Infrastructure Solutions, and Commercial & Industrial. These segments are reflective of how the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purpose of allocating resources and assessing performance. The Company’s CODM is its Chief Executive Officer. Transactions between segments, if any, are eliminated in consolidation. Our corporate organization provides general and administrative services, as well as support services, to each of our four operating segments. Management allocates certain shared costs between segments for selling, general and administrative expenses. Segment information for the three and six months ended March 31, 2022 and 2021 is as follows: Three Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 130,639 $ 260,406 $ 41,733 $ 68,815 $ — $ 501,593 Cost of services 119,518 214,862 34,672 74,034 — 443,086 Gross profit (loss) 11,121 45,544 7,061 (5,219) — 58,507 Selling, general and administrative 10,978 33,576 6,391 8,448 4,037 63,430 Contingent consideration — 69 — — — 69 Gain on sale of assets (7) — (28) (33) — (68) Operating income (loss) $ 150 $ 11,899 $ 698 $ (13,634) $ (4,037) $ (4,924) Other data: Depreciation and amortization expense $ 362 $ 3,721 $ 1,385 $ 647 $ 41 $ 6,156 Capital expenditures $ 750 $ 6,707 $ 823 $ 840 $ 168 $ 9,288 Total assets $ 171,929 $ 363,921 $ 150,276 $ 99,262 $ 45,851 $ 831,239 Three Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 94,886 $ 150,336 $ 34,716 $ 52,023 $ — $ 331,961 Cost of services 75,339 120,146 25,161 46,441 — 267,087 Gross profit 19,547 30,190 9,555 5,582 — 64,874 Selling, general and administrative 9,615 21,609 6,242 6,744 3,445 47,655 Contingent consideration — 73 — — — 73 Loss (gain) on sale of assets — 52 (26) (8) — 18 Operating income (loss) $ 9,932 $ 8,456 $ 3,339 $ (1,154) $ (3,445) $ 17,128 Other data: Depreciation and amortization expense $ 347 $ 3,205 $ 1,554 $ 683 $ 39 $ 5,828 Capital expenditures $ 133 $ 1,040 $ 163 $ 397 $ 89 $ 1,822 Total assets $ 128,568 $ 215,399 $ 134,037 $ 69,405 $ 68,243 $ 615,652 Six Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 258,028 $ 502,182 $ 83,829 $ 138,063 $ — $ 982,102 Cost of services 226,408 414,000 69,048 134,412 — 843,868 Gross profit 31,620 88,182 14,781 3,651 — 138,234 Selling, general and administrative 22,363 64,571 12,449 15,716 7,733 122,832 Contingent consideration — 138 — — — 138 Loss (gain) on sale of assets (13) 8 (28) (40) — (73) Operating income (loss) $ 9,270 $ 23,465 $ 2,360 $ (12,025) $ (7,733) $ 15,337 Other data: Depreciation and amortization expense $ 721 $ 7,573 $ 2,728 $ 1,277 $ 71 $ 12,370 Capital expenditures $ 1,344 $ 7,891 $ 11,139 $ 1,085 $ 168 $ 21,627 Total assets $ 171,929 $ 363,921 $ 150,276 $ 99,262 $ 45,851 $ 831,239 Six Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 193,242 $ 269,827 $ 69,117 $ 114,613 $ — $ 646,799 Cost of services 155,156 216,109 48,625 103,356 — 523,246 Gross profit 38,086 53,718 20,492 11,257 — 123,553 Selling, general and administrative 18,956 38,936 11,853 13,168 7,528 90,441 Contingent consideration — 73 — — — 73 Loss (gain) on sale of assets — 52 (27) (17) — 8 Operating income (loss) $ 19,130 $ 14,657 $ 8,666 $ (1,894) $ (7,528) $ 33,031 Other data: Depreciation and amortization expense $ 694 $ 4,709 $ 2,995 $ 1,377 $ 73 $ 9,848 Capital expenditures $ 265 $ 1,477 $ 508 $ 665 $ 89 $ 3,004 Total assets $ 128,568 $ 215,399 $ 134,037 $ 69,405 $ 68,243 $ 615,652

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Shareholders' Equity and Share-based Payments [Text Block]	7. STOCKHOLDERS’ EQUITY Equity Incentive Plan The Company’s 2006 Equity Incentive Plan, as amended and restated (the “Equity Incentive Plan”), provides for grants of stock options as well as grants of stock, including restricted stock. Approximately 3.0 million shares of common stock are authorized for issuance under the Equity Incentive Plan, of which approximately 713,151 shares were available for issuance at March 31, 2022. Stock Repurchase Program In 2015, our Board authorized a stock repurchase program for the purchase from time to time of up to 1.5 million shares of the Company’s common stock, and on May 2, 2019, our Board authorized the repurchase from time to time of up to an additional 1.0 million shares of our common stock under the stock repurchase program. Share purchases are made for cash in open market transactions at prevailing market prices or in privately negotiated transactions or otherwise. The timing and amount of purchases under the program are determined based upon prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. All or part of the repurchases may be implemented under a Rule 10b5-1 trading plan, which allows repurchases under predetermined terms at times when the Company might otherwise be prevented from purchasing under insider trading laws or because of self-imposed blackout periods. The program does not require the Company to purchase any specific number of shares and may be modified, suspended or reinstated at any time at the Company’s discretion and without notice. We repurchased 2,587 and 59,002 shares, respectively, of our common stock during the three and six months ended March 31, 2022 in open market transactions at an average price of $49.00 and $46.81, respectively, per share. We repurchased no shares of our common stock during the three and six months ended March 31, 2021 in open market transactions. Treasury Stock During the six months ended March 31, 2022, we issued 73,627 shares of common stock from treasury stock to employees and repurchased 45,198 shares of common stock from our employees to satisfy statutory tax withholding requirements upon the vesting of certain performance phantom stock units under the Equity Incentive Plan. In addition, we issued 83,540 shares from treasury stock to satisfy the vesting of Director PSUs (as defined below) in conjunction with the departure of a Board member. During the six months ended March 31, 2021, we issued 38,087 shares of common stock from treasury stock to employees and repurchased 16,882 shares of common stock from our employees to satisfy statutory tax withholding requirements upon the vesting of certain performance phantom stock units under the Equity Incentive Plan. In addition, 13,996 restricted shares were forfeited by certain former employees upon their departure and returned to treasury stock. We also issued 380 unrestricted shares of common stock from treasury to members of our Board of Directors as part of their overall compensation, and we issued 68,860 shares from treasury stock to satisfy the vesting of Director PSUs in conjunction with the departure of a board member. Restricted Stock We granted no restricted shares to executives during the six months ended March 31, 2022. Of the awards previously granted, 3,118 shares vested. The remaining restricted shares either vest subject to the achievement of specified levels of cumulative net income before taxes or vest based on the passage of time. During the three months ended March 31, 2022 and 2021, we recognized $36 and $36, respectively, in compensation expense related to all restricted stock awards. During the six months ended March 31, 2022 and 2021, we recognized $71 and $74, respectively, in compensation expense related to all restricted stock awards. At March 31, 2022, the unamortized compensation cost related to outstanding unvested restricted stock was $95. Director Phantom Stock Units Director phantom stock units (“Director PSUs”) are granted to the members of the Board of Directors as part of their overall compensation. The Director PSUs are contractual rights to receive one share of the Company's common stock and are paid via unrestricted stock grants to each director upon their departure from the Board of Directors, or upon a change in control. We record compensation expense for the full value of the grant on the date of grant. During the three months ended March 31, 2022 and 2021, we recognized $96 and $90, respectively, in compensation expense related to these grants. During the six months ended March 31, 2022 and 2021, we recognized $193 and $186, respectively, in compensation expense related to these grants. Employee Phantom Stock Units An employee phantom stock unit (an “Employee PSU”) is a contractual right to receive one share of the Company’s common stock. Depending on the terms of each grant, Employee PSUs may vest upon the achievement of certain specified performance objectives and continued performance of services, or may vest based on continued performance of services through the vesting date.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Mar. 31, 2022
Retirement Benefits [Abstract]
Compensation and Employee Benefit Plans [Text Block]	8. EMPLOYEE BENEFIT PLANS 401(k) Plan In November 1998, we established the IES Holdings, Inc. 401(k) Retirement Savings Plan. All full-time IES employees are eligible to participate on the first day of the month subsequent to completing sixty days of service and attaining age twenty one. Participants become vested in our matching contributions following three years of service. We also maintain several subsidiary retirement savings plans. During the three months ended March 31, 2022 and 2021, we recognized $1,195 and $773, respectively, in matching expense. During the six months ended March 31, 2022 and 2021, we recognized $2,116 and $1,479, respectively, in matching expense.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	9. FAIR VALUE MEASUREMENTS Fair Value Measurement Accounting Fair value is considered the price to sell an asset, or transfer a liability, between market participants on the measurement date. Fair value measurements assume that (1) the asset or liability is exchanged in an orderly manner, (2) the exchange is in the principal market for that asset or liability, and (3) the market participants are independent, knowledgeable, and able and willing to transact an exchange. Fair value accounting and reporting establishes a framework for measuring fair value by creating a hierarchy for observable independent market inputs and unobservable market assumptions and expands disclosures about fair value measurements. Judgment is required to interpret the market data used to develop fair value estimates. As such, the estimates presented herein are not necessarily indicative of the amounts that could be realized in a current exchange. The use of different market assumptions and/or estimation methods could have a material effect on the estimated fair value. At March 31, 2022, financial assets and liabilities measured at fair value on a recurring basis were limited to our Executive Deferred Compensation Plan, under which certain employees are permitted to defer a portion of their base salary and/or bonus for a Plan Year (as defined in the plan), equity securities held for sale, and contingent consideration liabilities related to certain of our acquisitions. Financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2022 and September 30, 2021, are summarized in the following tables by the type of inputs applicable to the fair value measurements: March 31, 2022 Total Fair Value Quoted Prices (Level 1) Significant Unobservable Inputs (Level 3) Executive savings plan assets $ 862 $ 862 $ — Equity securities 1,392 1,392 — Executive savings plan liabilities (734) (734) — Contingent consideration liability (4,252) — (4,252) Total $ (2,732) $ 1,520 $ (4,252) September 30, 2021 Total Fair Value Quoted Prices (Level 1) Significant Unobservable Inputs (Level 3) Executive savings plan assets $ 937 $ 937 $ — Executive savings plan liabilities (806) (806) — Contingent consideration liability (4,181) — (4,181) Total $ (4,050) $ 131 $ (4,181) In fiscal year 2021, we entered into a contingent consideration arrangement related to the acquisition of Bayonet. At March 31, 2022, we estimated the fair value of this contingent consideration liability at $4,252. The table below presents the fair value of this obligation, which used significant unobservable inputs (Level 3). Contingent Consideration Agreements Fair value at September 30, 2021 $ (4,181) Net adjustments to fair value (71) Fair value at March 31, 2022 $ (4,252)

Inventory

Inventory	6 Months Ended
	Mar. 31, 2022
Inventory Disclosure [Abstract]
Inventory Disclosure [Text Block]	10. INVENTORY Inventories consist of the following components: March 31, September 30, 2022 2021 Raw materials $ 7,877 $ 5,819 Work in process 7,528 6,848 Finished goods 1,758 1,554 Parts and supplies 68,736 54,352 Total inventories $ 85,899 $ 68,573

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	11. GOODWILL AND INTANGIBLE ASSETS Goodwill The following summarizes the carrying value of goodwill by segment at March 31, 2022, which was unchanged from September 30, 2021: Communications Residential Infrastructure Solutions Commercial & Industrial Total Goodwill at March 31, 2022 $ 2,816 $ 51,370 $ 38,209 $ — $ 92,395 Intangible Assets Intangible assets consist of the following: Estimated Useful Lives (in Years) March 31, 2022 Gross Carrying Amount Accumulated Amortization Net Trademarks/trade names 5 - 20 $ 15,262 $ (3,751) $ 11,511 Technical library 20 400 (171) 229 Customer relationships 6 - 15 96,879 (29,936) 66,943 Non-competition arrangements 5 40 (29) 11 Backlog and construction contracts 1 4,957 (4,957) — Total intangible assets $ 117,538 $ (38,844) $ 78,694 Estimated Useful Lives (in Years) September 30, 2021 Gross Carrying Amount Accumulated Amortization Net Trademarks/trade names 5 - 20 $ 15,262 $ (2,891) $ 12,371 Technical library 20 400 (161) 239 Customer relationships 6 - 15 96,879 (24,021) 72,858 Non-competition arrangements 5 40 (25) 15 Backlog and construction contracts 1 4,957 (4,821) 136 Total intangible assets $ 117,538 $ (31,919) $ 85,619

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	12. COMMITMENTS AND CONTINGENCIES Legal Matters From time to time we are a party to various claims, lawsuits and other legal proceedings that arise in the ordinary course of business. We maintain various insurance coverages to minimize financial risk associated with these proceedings. None of these proceedings, separately or in the aggregate, are expected to have a material adverse effect on our financial position, results of operations or cash flows. With respect to all such proceedings, we record reserves when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. We expense routine legal costs related to these proceedings as they are incurred. On June 22, 2021, the United States Department of Labor Wage and Hour Division (the “DOL”) notified IES Residential, Inc. (“IESR”), a wholly-owned subsidiary of the Company, that the DOL had commenced an administrative investigation of IESR’s compliance with laws regulating employee wage payment. The inquiry concerned overtime calculations and record keeping with respect to certain Arizona employees who are paid on a piece rate basis. In response to certain DOL requests, IESR produced documents and made employees available for interviews. On November 10, 2021, the DOL indicated that it believes IESR piece rate employees did not record all hours worked, and therefore, IESR was not in compliance with the Fair Labor Standards Act. We are conducting an internal investigation on this matter, and plan to vigorously defend the Company against these allegations. We have established a reserve of $350 for the costs to investigate and resolve this matter. At this time, it is not possible for us to estimate a range of costs we expect to incur. In the course of performing work as a subcontractor, from time to time we may be involved in projects which are the subject of contractual disputes between the general contractor and project owner, or between us and the general contractor. In such cases, payment of amounts owed to us by the general contractor may be delayed as contractual disputes are resolved through mediation, arbitration, or litigation. Such disputes may cause us to incur legal fees and other expenses to enforce our contractual rights, and we may not prevail in recovering all amounts to which we believe we are contractually entitled. At March 31, 2022, we had an aggregate $9,700 of trade accounts receivable where payment has been delayed as a result of contractual disputes. We believe that we are contractually entitled to all of these amounts, and intend to vigorously pursue recovery. However, based on uncertainty around the timing and amount of recovery, at March 31, 2022, we have recorded a reserve of $1,800 against these receivables. Risk Management We retain the risk for workers’ compensation, employer’s liability, automobile liability, construction defects, general liability and employee group health claims, as well as pollution coverage, resulting from uninsured deductibles per accident or occurrence which are generally subject to annual aggregate limits. Our general liability program provides coverage for bodily injury and property damage. In many cases, we insure third parties, including general contractors, as additional insured parties under our insurance policies. Losses are accrued based upon our known claims incurred and an estimate of claims incurred but not reported. As a result, many of our claims are effectively self-insured. Many claims against our insurance are in the form of litigation. At March 31, 2022 and September 30, 2021, we had $6,039 and $5,787, respectively, accrued for self-insurance liabilities. Because the reserves are based on judgment and estimates and involve variables that are inherently uncertain, such as the outcome of litigation and an assessment of insurance coverage, there can be no assurance that the ultimate liability will not be higher or lower than such estimates or that the timing of payments will not create liquidity issues for the Company. Some of the underwriters of our casualty insurance program require us to post letters of credit as collateral. This is common in the insurance industry. To date, we have not had a situation where an underwriter has had reasonable cause to effect payment under a letter of credit. At March 31, 2022 and September 30, 2021, $3,962 and $4,327, respectively, of our outstanding letters of credit was utilized to collateralize our insurance program. Surety As of March 31, 2022, the estimated cost to complete our bonded projects was approximately $125,880. We evaluate our bonding requirements on a regular basis, including the terms offered by our sureties. We believe the bonding capacity presently provided by our current sureties is adequate for our current operations and will be adequate for our operations for the foreseeable future. Posting letters of credit in favor of our sureties reduces the borrowing availability under our revolving credit facility. Other Commitments and Contingencies Some of our customers and vendors require us to post letters of credit, or provide intercompany guarantees, as a means of guaranteeing performance under our contracts and ensuring payment by us to subcontractors and vendors. If our customer has reasonable cause to effect payment under a letter of credit, we would be required to reimburse our creditor for the letter of credit.

Leases

Leases	6 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Leases	13. LEASES We enter into various contractual arrangements for the right to use facilities, vehicles and equipment. The lease terms generally range from two to ten years for facilities and three to five years for vehicles and equipment. Our lease terms may include the exercise of renewal or termination options when it is reasonably certain these options will be exercised. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. Current operating and finance liabilities of $14,877 and $1,546, respectively, as of March 31, 2022, and $13,973 and $1,033, respectively, as of September 30, 2021, were included in “Accounts payable and accrued expenses” in the Condensed Consolidated Balance Sheets. Non-current finance lease liabilities and finance lease right-of-use assets were included in the “Other non-current liabilities” and “Other non-current assets”, respectively, in the Condensed Consolidated Balance Sheets. The maturities of our lease liabilities as of March 31, 2022 are as follows: Operating Leases Finance Leases Total Remainder of 2022 $ 11,726 $ 1,187 $ 12,913 2023 11,918 1,576 13,494 2024 8,683 1,541 10,224 2025 6,052 1,256 7,308 2026 3,945 643 4,588 Thereafter 4,482 240 4,722 Total undiscounted lease payments $ 46,806 $ 6,443 $ 53,249 Less: imputed interest 3,559 540 4,099 Present value of lease liabilities $ 43,247 $ 5,903 $ 49,150 The total future undiscounted cash flows related to lease agreements committed to but not yet commenced as of March 31, 2022 is $2,346. Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating lease cost $ 4,157 $ 3,804 $ 0 $ 8,160 $ 7,049 Finance lease cost Amortization of lease assets 332 133 603 242 Interest on lease liabilities 56 26 104 48 Finance lease cost 388 159 707 290 Short-term lease cost 491 237 776 550 Variable lease cost 485 343 957 634 Total lease cost $ 5,521 $ 4,543 $ 10,600 $ 8,523 Other information about lease amounts recognized in our Condensed Consolidated Financial Statements is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating cash flows used for operating leases $ 5,111 $ 3,654 $ 9,351 $ 7,649 Operating cash flows used for finance leases 56 — 104 48 Right-of-use assets obtained in exchange for new operating lease liabilities 3,984 6,247 11,499 14,861 Right-of-use assets obtained in exchange for new finance lease liabilities 1,328 396 2,582 960 March 31, 2022 September 30, 2021 Weighted-average remaining lease term - operating leases 4.3 years 5.0 years Weighted-average remaining lease term - finance leases 4.3 years 4.2 years Weighted-average discount rate - operating leases 3.4 % 3.7 % Weighted-average discount rate - finance leases 4.1 % 4.3 %
Leases	13. LEASES We enter into various contractual arrangements for the right to use facilities, vehicles and equipment. The lease terms generally range from two to ten years for facilities and three to five years for vehicles and equipment. Our lease terms may include the exercise of renewal or termination options when it is reasonably certain these options will be exercised. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. Current operating and finance liabilities of $14,877 and $1,546, respectively, as of March 31, 2022, and $13,973 and $1,033, respectively, as of September 30, 2021, were included in “Accounts payable and accrued expenses” in the Condensed Consolidated Balance Sheets. Non-current finance lease liabilities and finance lease right-of-use assets were included in the “Other non-current liabilities” and “Other non-current assets”, respectively, in the Condensed Consolidated Balance Sheets. The maturities of our lease liabilities as of March 31, 2022 are as follows: Operating Leases Finance Leases Total Remainder of 2022 $ 11,726 $ 1,187 $ 12,913 2023 11,918 1,576 13,494 2024 8,683 1,541 10,224 2025 6,052 1,256 7,308 2026 3,945 643 4,588 Thereafter 4,482 240 4,722 Total undiscounted lease payments $ 46,806 $ 6,443 $ 53,249 Less: imputed interest 3,559 540 4,099 Present value of lease liabilities $ 43,247 $ 5,903 $ 49,150 The total future undiscounted cash flows related to lease agreements committed to but not yet commenced as of March 31, 2022 is $2,346. Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating lease cost $ 4,157 $ 3,804 $ 0 $ 8,160 $ 7,049 Finance lease cost Amortization of lease assets 332 133 603 242 Interest on lease liabilities 56 26 104 48 Finance lease cost 388 159 707 290 Short-term lease cost 491 237 776 550 Variable lease cost 485 343 957 634 Total lease cost $ 5,521 $ 4,543 $ 10,600 $ 8,523 Other information about lease amounts recognized in our Condensed Consolidated Financial Statements is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating cash flows used for operating leases $ 5,111 $ 3,654 $ 9,351 $ 7,649 Operating cash flows used for finance leases 56 — 104 48 Right-of-use assets obtained in exchange for new operating lease liabilities 3,984 6,247 11,499 14,861 Right-of-use assets obtained in exchange for new finance lease liabilities 1,328 396 2,582 960 March 31, 2022 September 30, 2021 Weighted-average remaining lease term - operating leases 4.3 years 5.0 years Weighted-average remaining lease term - finance leases 4.3 years 4.2 years Weighted-average discount rate - operating leases 3.4 % 3.7 % Weighted-average discount rate - finance leases 4.1 % 4.3 %

Business Combinations and Dives

Business Combinations and Divestitures	6 Months Ended
	Mar. 31, 2022
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	14. BUSINESS COMBINATIONS AND DIVESTITURES We completed no acquisitions during the six months ended March 31, 2022. We completed four acquisitions in fiscal year 2021 for total aggregate cash consideration of $92,462. In November 2020, we acquired both Wedlake Fabricating, Inc., a Tulsa, Oklahoma-based manufacturer of custom generator enclosures that are primarily used by data centers and large commercial and industrial facilities, and K.E.P. Electric, Inc., a Batavia, Ohio-based electrical contractor specializing in the design and installation of electrical systems for single-family housing and multi-family developments. In December 2020, we acquired an 80% interest in Bayonet Plumbing, Heating & Air-Conditioning, LLC, a Hudson, Florida-based provider of residential heating, ventilation and air conditioning ("HVAC") and plumbing installation and maintenance services. In May 2021, we acquired an 80% ownership interest in Edmonson Electric, LLC, a Land O'Lakes, Florida-based provider of residential electric, low voltage, and HVAC installation services.

Subsequent Events

Subsequent Events	6 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On April 28, 2022, we entered into the Amended Credit Agreement with Wells Fargo which increased the maximum revolver amount from $125,000 to $150,000. The Amended Credit Agreement also removed the aggregate cap on Company investments in certain securities and the cap on the Company’s ability to make stock repurchases, in each case subject to the satisfaction of certain liquidity requirements. The Amended Credit Agreement continues to contain other customary affirmative, negative and financial covenants as well as events of default.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Mar. 31, 2022
Revenue Recognition and Deferred Revenue [Abstract]
Disaggregation of Revenue [Table Text Block]	Three Months Ended March 31, Six Months Ended March 31, 2022 2021 2022 2021 Communications $ 130,639 $ 94,886 $ 258,028 $ 193,242 Residential Single-family 192,368 100,476 365,896 172,602 Multi-family and Other 68,038 49,860 136,286 97,225 Total Residential 260,406 150,336 502,182 269,827 Infrastructure Solutions Industrial Services 15,837 10,548 30,653 20,588 Custom Power Solutions 25,896 24,168 53,176 48,529 Total Infrastructure Solutions 41,733 34,716 83,829 69,117 Commercial & Industrial 68,815 52,023 $ 138,063 $ 114,613 Total Revenue $ 501,593 $ 331,961 $ 982,102 $ 646,799 Three Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 85,722 $ 260,406 $ 39,924 $ 64,346 $ 450,398 Time-and-material 44,917 — 1,809 4,469 51,195 Total revenue $ 130,639 $ 260,406 $ 41,733 $ 68,815 $ 501,593 Three Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 68,551 $ 150,336 $ 32,959 $ 49,003 $ 300,849 Time-and-material 26,335 — 1,757 3,020 31,112 Total revenue $ 94,886 $ 150,336 $ 34,716 $ 52,023 $ 331,961 Six Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 174,144 $ 502,182 $ 80,377 $ 129,206 $ 885,909 Time-and-material 83,884 — 3,452 8,857 96,193 Total revenue $ 258,028 $ 502,182 $ 83,829 $ 138,063 $ 982,102 Six Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Total Fixed-price $ 144,565 $ 269,827 $ 65,623 $ 109,690 $ 589,705 Time-and-material 48,677 — 3,494 4,923 57,094 Total revenue $ 193,242 $ 269,827 $ 69,117 $ 114,613 $ 646,799

Per Share Information (Tables)

Per Share Information (Tables)	6 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended March 31, 2022 2021 Numerator: Net income (loss) attributable to IES Holdings, Inc. $ (5,412) $ 12,836 Increase in noncontrolling interest 870 621 Net income attributable to restricted stockholders of IES Holdings, Inc. — 8 Net income (loss) attributable to common stockholders of IES Holdings, Inc. $ (6,282) $ 12,207 Denominator: Weighted average common shares outstanding — basic 20,772,426 20,780,006 Effect of dilutive stock options and non-vested securities 0 291,053 Weighted average common and common equivalent shares outstanding — diluted 20,772,426 21,071,059 Earnings (loss) per share attributable to common stockholders of IES Holdings, Inc.: Basic $ (0.30) $ 0.59 Diluted $ (0.30) $ 0.58 Six Months Ended March 31, 2022 2021 Numerator: Net income attributable to IES Holdings, Inc. $ 9,052 $ 24,934 Increase in noncontrolling interest 930 503 Net income attributable to restricted stockholders of IES Holdings, Inc. 6 20 Net income attributable to common stockholders of IES Holdings, Inc. $ 8,116 $ 24,411 Denominator: Weighted average common shares outstanding — basic 20,737,253 20,756,879 Effect of dilutive stock options and non-vested securities 402,176 302,209 Weighted average common and common equivalent shares outstanding — diluted 21,139,429 21,059,088 Earnings per share attributable to common stockholders of IES Holdings, Inc.: Basic $ 0.39 $ 1.18 Diluted $ 0.38 $ 1.16

Operating Segments (Tables)

Operating Segments (Tables)	6 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 130,639 $ 260,406 $ 41,733 $ 68,815 $ — $ 501,593 Cost of services 119,518 214,862 34,672 74,034 — 443,086 Gross profit (loss) 11,121 45,544 7,061 (5,219) — 58,507 Selling, general and administrative 10,978 33,576 6,391 8,448 4,037 63,430 Contingent consideration — 69 — — — 69 Gain on sale of assets (7) — (28) (33) — (68) Operating income (loss) $ 150 $ 11,899 $ 698 $ (13,634) $ (4,037) $ (4,924) Other data: Depreciation and amortization expense $ 362 $ 3,721 $ 1,385 $ 647 $ 41 $ 6,156 Capital expenditures $ 750 $ 6,707 $ 823 $ 840 $ 168 $ 9,288 Total assets $ 171,929 $ 363,921 $ 150,276 $ 99,262 $ 45,851 $ 831,239 Three Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 94,886 $ 150,336 $ 34,716 $ 52,023 $ — $ 331,961 Cost of services 75,339 120,146 25,161 46,441 — 267,087 Gross profit 19,547 30,190 9,555 5,582 — 64,874 Selling, general and administrative 9,615 21,609 6,242 6,744 3,445 47,655 Contingent consideration — 73 — — — 73 Loss (gain) on sale of assets — 52 (26) (8) — 18 Operating income (loss) $ 9,932 $ 8,456 $ 3,339 $ (1,154) $ (3,445) $ 17,128 Other data: Depreciation and amortization expense $ 347 $ 3,205 $ 1,554 $ 683 $ 39 $ 5,828 Capital expenditures $ 133 $ 1,040 $ 163 $ 397 $ 89 $ 1,822 Total assets $ 128,568 $ 215,399 $ 134,037 $ 69,405 $ 68,243 $ 615,652 Six Months Ended March 31, 2022 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 258,028 $ 502,182 $ 83,829 $ 138,063 $ — $ 982,102 Cost of services 226,408 414,000 69,048 134,412 — 843,868 Gross profit 31,620 88,182 14,781 3,651 — 138,234 Selling, general and administrative 22,363 64,571 12,449 15,716 7,733 122,832 Contingent consideration — 138 — — — 138 Loss (gain) on sale of assets (13) 8 (28) (40) — (73) Operating income (loss) $ 9,270 $ 23,465 $ 2,360 $ (12,025) $ (7,733) $ 15,337 Other data: Depreciation and amortization expense $ 721 $ 7,573 $ 2,728 $ 1,277 $ 71 $ 12,370 Capital expenditures $ 1,344 $ 7,891 $ 11,139 $ 1,085 $ 168 $ 21,627 Total assets $ 171,929 $ 363,921 $ 150,276 $ 99,262 $ 45,851 $ 831,239 Six Months Ended March 31, 2021 Communications Residential Infrastructure Solutions Commercial & Industrial Corporate Total Revenues $ 193,242 $ 269,827 $ 69,117 $ 114,613 $ — $ 646,799 Cost of services 155,156 216,109 48,625 103,356 — 523,246 Gross profit 38,086 53,718 20,492 11,257 — 123,553 Selling, general and administrative 18,956 38,936 11,853 13,168 7,528 90,441 Contingent consideration — 73 — — — 73 Loss (gain) on sale of assets — 52 (27) (17) — 8 Operating income (loss) $ 19,130 $ 14,657 $ 8,666 $ (1,894) $ (7,528) $ 33,031 Other data: Depreciation and amortization expense $ 694 $ 4,709 $ 2,995 $ 1,377 $ 73 $ 9,848 Capital expenditures $ 265 $ 1,477 $ 508 $ 665 $ 89 $ 3,004 Total assets $ 128,568 $ 215,399 $ 134,037 $ 69,405 $ 68,243 $ 615,652

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	March 31, 2022 Total Fair Value Quoted Prices (Level 1) Significant Unobservable Inputs (Level 3) Executive savings plan assets $ 862 $ 862 $ — Equity securities 1,392 1,392 — Executive savings plan liabilities (734) (734) — Contingent consideration liability (4,252) — (4,252) Total $ (2,732) $ 1,520 $ (4,252) September 30, 2021 Total Fair Value Quoted Prices (Level 1) Significant Unobservable Inputs (Level 3) Executive savings plan assets $ 937 $ 937 $ — Executive savings plan liabilities (806) (806) — Contingent consideration liability (4,181) — (4,181) Total $ (4,050) $ 131 $ (4,181)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Contingent Consideration Agreements Fair value at September 30, 2021 $ (4,181) Net adjustments to fair value (71) Fair value at March 31, 2022 $ (4,252)

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Mar. 31, 2022
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	Inventories consist of the following components: March 31, September 30, 2022 2021 Raw materials $ 7,877 $ 5,819 Work in process 7,528 6,848 Finished goods 1,758 1,554 Parts and supplies 68,736 54,352 Total inventories $ 85,899 $ 68,573

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Communications Residential Infrastructure Solutions Commercial & Industrial Total Goodwill at March 31, 2022 $ 2,816 $ 51,370 $ 38,209 $ — $ 92,395
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Estimated Useful Lives (in Years) March 31, 2022 Gross Carrying Amount Accumulated Amortization Net Trademarks/trade names 5 - 20 $ 15,262 $ (3,751) $ 11,511 Technical library 20 400 (171) 229 Customer relationships 6 - 15 96,879 (29,936) 66,943 Non-competition arrangements 5 40 (29) 11 Backlog and construction contracts 1 4,957 (4,957) — Total intangible assets $ 117,538 $ (38,844) $ 78,694 Estimated Useful Lives (in Years) September 30, 2021 Gross Carrying Amount Accumulated Amortization Net Trademarks/trade names 5 - 20 $ 15,262 $ (2,891) $ 12,371 Technical library 20 400 (161) 239 Customer relationships 6 - 15 96,879 (24,021) 72,858 Non-competition arrangements 5 40 (25) 15 Backlog and construction contracts 1 4,957 (4,821) 136 Total intangible assets $ 117,538 $ (31,919) $ 85,619

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity	The maturities of our lease liabilities as of March 31, 2022 are as follows: Operating Leases Finance Leases Total Remainder of 2022 $ 11,726 $ 1,187 $ 12,913 2023 11,918 1,576 13,494 2024 8,683 1,541 10,224 2025 6,052 1,256 7,308 2026 3,945 643 4,588 Thereafter 4,482 240 4,722 Total undiscounted lease payments $ 46,806 $ 6,443 $ 53,249 Less: imputed interest 3,559 540 4,099 Present value of lease liabilities $ 43,247 $ 5,903 $ 49,150
Lease, Cost	Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating lease cost $ 4,157 $ 3,804 $ 0 $ 8,160 $ 7,049 Finance lease cost Amortization of lease assets 332 133 603 242 Interest on lease liabilities 56 26 104 48 Finance lease cost 388 159 707 290 Short-term lease cost 491 237 776 550 Variable lease cost 485 343 957 634 Total lease cost $ 5,521 $ 4,543 $ 10,600 $ 8,523
Schedule of Cash Flow, Supplemental Disclosures	Other information about lease amounts recognized in our Condensed Consolidated Financial Statements is summarized as follows: Three Months Ended Six Months Ended March 31, 2022 March 31, 2021 March 31, 2022 March 31, 2021 Operating cash flows used for operating leases $ 5,111 $ 3,654 $ 9,351 $ 7,649 Operating cash flows used for finance leases 56 — 104 48 Right-of-use assets obtained in exchange for new operating lease liabilities 3,984 6,247 11,499 14,861 Right-of-use assets obtained in exchange for new finance lease liabilities 1,328 396 2,582 960 March 31, 2022 September 30, 2021 Weighted-average remaining lease term - operating leases 4.3 years 5.0 years Weighted-average remaining lease term - finance leases 4.3 years 4.2 years Weighted-average discount rate - operating leases 3.4 % 3.7 % Weighted-average discount rate - finance leases 4.1 % 4.3 %

Business (Details)

Business (Details) $ in Thousands	Mar. 31, 2022USD ($)
Accounting Policies [Abstract]
Redeemable Noncontrolling Interest, Equity, Redemption Value	$ 21,942

Controlling Shareholder (Detail

Controlling Shareholder (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)
Risks and Uncertainties [Abstract]
ControllingShareholderOwnershipPercentage	56.00%
Related Party Transaction, Purchases from Related Party	$ 8

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Revenue Recognition and Deferred Revenue [Abstract]
Unbilled Receivables, Current	$ 21,824		$ 21,824
Costs and estimated earnings in excess of billings	55,517		55,517		$ 43,389
Billings in excess of costs and estimated earnings	(63,619)		(63,619)		$ (62,486)
Contract with Customer, Liability, Revenue Recognized	38,349	$ 28,385	45,115	$ 33,740
Performance Obligation Next 12 Months	792,953		792,953
Revenue, Remaining Performance Obligation, Amount	835,548		835,548
Disaggregation of Revenue [Line Items]
Revenues	501,593	331,961	982,102	646,799
Contract with Customer, Liability, Revenue Recognized	38,349	28,385	45,115	33,740
Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	68,815	52,023	138,063	114,613
Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	130,639	94,886	258,028	193,242
Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	41,733	34,716	83,829	69,117
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	260,406	150,336	502,182	269,827
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	450,398	300,849	885,909	589,705
Fixed-price Contract [Member] | Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	64,346	49,003	129,206	109,690
Fixed-price Contract [Member] | Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	85,722	68,551	174,144	144,565
Fixed-price Contract [Member] | Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	39,924	32,959	80,377	65,623
Fixed-price Contract [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	260,406	150,336	502,182	269,827
Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	51,195	31,112	96,193	57,094
Time-and-materials Contract [Member] | Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,469	3,020	8,857	4,923
Time-and-materials Contract [Member] | Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	44,917	26,335	83,884	48,677
Time-and-materials Contract [Member] | Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,809	1,757	3,452	3,494
Time-and-materials Contract [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
industrial Services [Member] | Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	15,837	10,548	30,653	20,588
Custom Power Solutions [Member] | Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	25,896	24,168	53,176	48,529
Single Family Contracts [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	192,368	100,476	365,896	172,602
Multi Family and Other [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 68,038	$ 49,860	$ 136,286	$ 97,225

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-term debt	$ 69,498	$ 39,746
Letters of Credit Outstanding, Amount	4,161
Line of Credit Facility, Remaining Borrowing Capacity	50,619
Loans Payable to Bank, Noncurrent	70,220	40,339
Other Long-term Debt, Noncurrent	15	$ 63
Line of Credit Facility, Maximum Borrowing Capacity	$ 125,000

Per Share Information (Details)

Per Share Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	$ (6,282)	$ 12,207	$ 8,116	$ 24,411
Noncontrolling Interest, Change in Redemption Value	870	621	930	503
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	0	8	6	20
Comprehensive income attributable to IES Holdings, Inc.	$ (5,412)	$ 12,836	$ 9,052	$ 24,934
Weighted Average Number of Shares Outstanding, Basic	20,772,426	20,780,006	20,737,253	20,756,879
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	291,053	402,176	302,209
Weighted Average Number of Shares Outstanding, Diluted	20,772,426	21,071,059	21,139,429	21,059,088
Earnings Per Share, Basic	$ (0.30)	$ 0.59	$ 0.39	$ 1.18
Earnings Per Share, Diluted	$ (0.30)	$ 0.58	$ 0.38	$ 1.16

Operating Segments (Details)

Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Cost of services	$ 443,086	$ 267,087	$ 843,868	$ 523,246
Gross profit	58,507	64,874	138,234	123,553
Selling, general and administrative expenses	63,430	47,655	122,832	90,441
Contingent consideration	69		138	73
Loss (gain) on sale of assets	(68)	(18)	(73)	8
Operating income (loss)	(4,924)	17,128	15,337	33,031
Depreciation and amortization expense	6,156	5,828	12,370	9,848
Capital expenditures	9,288	1,822	21,627	3,004
Total assets	831,239	615,652	831,239	615,652	$ 766,622
Revenues	501,593	331,961	982,102	646,799
Commercial and Industrial [Member]
Segment Reporting Information [Line Items]
Cost of services	74,034	46,441	134,412	103,356
Gross profit	(5,219)	5,582	3,651	11,257
Selling, general and administrative expenses	8,448	6,744	15,716	13,168
Loss (gain) on sale of assets	(33)	(8)	(40)	(17)
Operating income (loss)	(13,634)	(1,154)	(12,025)	(1,894)
Depreciation and amortization expense	647	683	1,277	1,377
Capital expenditures	840	397	1,085	665
Total assets	99,262	69,405	99,262	69,405
Revenues	68,815	52,023	138,063	114,613
Communications [Member]
Segment Reporting Information [Line Items]
Cost of services	119,518	75,339	226,408	155,156
Gross profit	11,121	19,547	31,620	38,086
Selling, general and administrative expenses	10,978	9,615	22,363	18,956
Loss (gain) on sale of assets	(7)	0	(13)	0
Operating income (loss)	150	9,932	9,270	19,130
Depreciation and amortization expense	362	347	721	694
Capital expenditures	750	133	1,344	265
Total assets	171,929	128,568	171,929	128,568
Revenues	130,639	94,886	258,028	193,242
Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Cost of services	34,672	25,161	69,048	48,625
Gross profit	7,061	9,555	14,781	20,492
Selling, general and administrative expenses	6,391	6,242	12,449	11,853
Loss (gain) on sale of assets	(28)	(26)	(28)	(27)
Operating income (loss)	698	3,339	2,360	8,666
Depreciation and amortization expense	1,385	1,554	2,728	2,995
Capital expenditures	823	163	11,139	508
Total assets	150,276	134,037	150,276	134,037
Revenues	41,733	34,716	83,829	69,117
Residential [Member]
Segment Reporting Information [Line Items]
Cost of services	214,862	120,146	414,000	216,109
Gross profit	45,544	30,190	88,182	53,718
Selling, general and administrative expenses	33,576	21,609	64,571	38,936
Contingent consideration	69	73	138	73
Loss (gain) on sale of assets	0	52	8	52
Operating income (loss)	11,899	8,456	23,465	14,657
Depreciation and amortization expense	3,721	3,205	7,573	4,709
Capital expenditures	6,707	1,040	7,891	1,477
Total assets	363,921	215,399	363,921	215,399
Revenues	260,406	150,336	502,182	269,827
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Cost of services	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expenses	4,037	3,445	7,733	7,528
Loss (gain) on sale of assets	0	0	0	0
Operating income (loss)	(4,037)	(3,445)	(7,733)	(7,528)
Depreciation and amortization expense	41	39	71	73
Capital expenditures	168	89	168	89
Total assets	45,851	68,243	45,851	68,243
Revenues	$ 0	$ 0	$ 0	$ 0

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	May 02, 2019	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized	100,000,000		100,000,000			100,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			3,118
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted			0
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited			4,962
Shares, vested			106,964
Shares, Outstanding	321,463		321,463
Treasury Stock Acquired, Average Cost Per Share		$ 49		$ 46.81
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 95		$ 95
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			45,198	16,882
Common Stock, Capital Shares Reserved for Future Issuance	713,151		713,151
Stock Repurchase Program, Number of Shares Authorized to be Repurchased									1,000,000	1,500,000
Treasury Stock Acquired, Average Cost Per Share		$ 49		$ 46.81
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			45,198	16,882
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 95		$ 95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period		13,996
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			150,447
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	36	$ 36	$ 71	$ 74
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	96	90	193	186
Performance Based Phantom Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 864	$ 711	$ 1,632	$ 1,408
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired	2,587		104,200	30,878
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			73,627	38,087
Shares, Issued	1,264,031	1,210,685	1,264,031	1,210,685	1,261,444	1,316,998	1,279,545	1,287,134
Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Issued		380		380
Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			83,540	68,860
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized	3,000,000		3,000,000
Repurchase Agreements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired	2,587		59,002

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Defined Contribution Plan, Cost	$ 1,195	$ 773	$ 2,116	$ 1,479

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Sep. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 862	$ 937
Investments, Fair Value Disclosure	1,392
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(734)	(806)
Business Combination, Contingent Consideration, Liability, Noncurrent	(4,252)	(4,181)
Fair Value, Net Asset (Liability)	2,732	4,050
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(71)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	862	937
Investments, Fair Value Disclosure	1,392
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(734)	(806)
Fair Value, Net Asset (Liability)	(1,520)	(131)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent	(4,252)	(4,181)
Fair Value, Net Asset (Liability)	$ (4,252)	$ 4,181

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Gross	$ 7,877	$ 5,819
Inventory, Work in Process, Gross	7,528	6,848
Inventory, Finished Goods, Gross	1,758	1,554
Other Inventory, Gross	68,736	54,352
Inventory, Net	$ 85,899	$ 68,573

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets Goodwill (Details) $ in Thousands	Mar. 31, 2022USD ($)
Goodwill [Line Items]
Goodwill	$ 92,395
Goodwill	92,395
Commercial and Industrial [Member]
Goodwill [Line Items]
Goodwill	0
Residential [Member]
Goodwill [Line Items]
Goodwill	51,370
Infrastructure Solutions [Member]
Goodwill [Line Items]
Goodwill	38,209
Communications [Member]
Goodwill [Line Items]
Goodwill	$ 2,816

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 117,538	$ 117,538
Finite-Lived Intangible Assets, Accumulated Amortization	(38,844)	(31,919)
Intangible Assets, Net (Excluding Goodwill)	78,694	85,619
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	15,262	15,262
Finite-Lived Intangible Assets, Accumulated Amortization	(3,751)	(2,891)
Intangible Assets, Net (Excluding Goodwill)	$ 11,511	$ 12,371
Trademarks and Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Trademarks and Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Technical Library
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Finite-Lived Intangible Assets, Gross	$ 400	$ 400
Finite-Lived Intangible Assets, Accumulated Amortization	(171)	(161)
Intangible Assets, Net (Excluding Goodwill)	229	239
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	96,879	96,879
Finite-Lived Intangible Assets, Accumulated Amortization	(29,936)	(24,021)
Intangible Assets, Net (Excluding Goodwill)	$ 66,943	$ 72,858
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Finite-Lived Intangible Assets, Gross	$ 40	$ 40
Finite-Lived Intangible Assets, Accumulated Amortization	(29)	(25)
Intangible Assets, Net (Excluding Goodwill)	$ 11	$ 15
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year
Finite-Lived Intangible Assets, Gross	$ 4,957	$ 4,957
Finite-Lived Intangible Assets, Accumulated Amortization	(4,957)	(4,821)
Intangible Assets, Net (Excluding Goodwill)	$ 0	$ 136

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	Nov. 10, 2021	Mar. 31, 2022	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Loss contingency, reserve	$ 350	$ 1,800
Trade accounts receivable		9,700
Accrued Insurance, Current		6,039,000	$ 5,787,000
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount		4,161,000
Estimated cost of completion of bonded projects		125,880,000
Purchase Commitment, Remaining Minimum Amount Committed		12,058,000
Insurance Related [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount		$ 3,962,000	$ 4,327,000

Leases (Details)

Leases (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Leases [Abstract]
Operating Lease, Liability, Current	$ 14,877,000		$ 14,877,000		$ 13,973,000
Finance Lease, Liability, Current	1,546,000		1,546,000		$ 1,033,000
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	11,726,000		11,726,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	11,918,000		11,918,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,683,000		8,683,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,052,000		6,052,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,945,000		3,945,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	4,482,000		4,482,000
Lessee, Operating Lease, Liability, Payments, Due	46,806,000		46,806,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	3,559,000		3,559,000
Operating Lease, Liability	43,247,000		43,247,000
Finance Lease, Liability, Payments, Due Next Twelve Months	1,187,000		1,187,000
Finance Lease, Liability, Payments, Due Year Two	1,576,000		1,576,000
Finance Lease, Liability, Payments, Due Year Three	1,541,000		1,541,000
Finance Lease, Liability, Payments, Due Year Four	1,256,000		1,256,000
Finance Lease, Liability, Payments, Due Year Five	643,000		643,000
Finance Lease, Liability, Payments, Due after Year Five	240,000		240,000
Finance Lease, Liability, Payment, Due	6,443,000		6,443,000
Finance Lease, Liability, Undiscounted Excess Amount	540,000		540,000
Finance Lease, Liability	5,903,000		5,903,000
Lessee, Total Lease, Liability, Payments, Remainder of Fiscal Year [Line Items]	12,913,000		12,913,000
Total Lease, Liability, Payments, Year Two	13,494,000		13,494,000
Total Lease, Liability, Payments, Year Three	10,224,000		10,224,000
Total Lease, Liability, Payments, Year Four	7,308,000		7,308,000
Total Lease, Liability, Payments, Year Five	4,588,000		4,588,000
Total Lease, Liability, Payments, Due After Year Five	4,722,000		4,722,000
Total Lease, Liability, Payments Due	53,249,000		53,249,000
Total Lease, Liability, Undiscounted Excess Amount	4,099,000		4,099,000
Total Lease, Liability	49,150,000		49,150,000
Lessee, Operating Lease, Lease Not yet Commenced, Description	2,346,000		2,346,000
Operating Lease, Cost	4,157,000	$ 3,804,000	8,160,000	$ 7,049,000
Finance Lease, Right-of-Use Asset, Amortization	332,000	133,000	603,000	242,000
Finance Lease, Interest Expense	56,000	26,000	104,000	48,000
Finance Lease, Cost	388,000	159,000	707,000	290,000
Short-term Lease, Cost	491,000	237,000	776,000	550,000
Variable Lease, Cost	485,000	343,000	957,000	634,000
Lease, Cost	5,521,000	4,543,000	10,600,000	8,523,000
Operating Lease, Payments	5,111,000	3,654,000	9,351,000	7,649,000
Finance Lease, Interest Payment on Liability	56,000	0	104,000	48,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	3,984,000	6,247,000	11,499,000	14,861,000
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1,328,000	$ 396,000	$ 2,582,000	$ 960,000
Operating Lease, Weighted Average Remaining Lease Term	4 years 3 months 18 days		4 years 3 months 18 days		5 years
Finance Lease, Weighted Average Remaining Lease Term	4 years 3 months 18 days		4 years 3 months 18 days		4 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.40%		3.40%		3.70%
Finance Lease, Weighted Average Discount Rate, Percent	4.10%		4.10%		4.30%

Business Combinations and Div_2

Business Combinations and Divestitures (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2021	Mar. 31, 2022
Business Combinations [Abstract]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ 4,500
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest		92,462
Redeemable Noncontrolling Interest, Equity, Redemption Value		$ 21,942
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	$ 4,074

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Thousands	Apr. 28, 2022	Mar. 31, 2022
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 125,000
Subsequent Event
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 150,000