0001048268-22-000026 | 10-Q | XBRL Viewer

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 7,826	$ 23,105
Accounts receivable	294,789	286,707
Accounts and Other Receivables, Net, Current	45,741	41,341
Inventories	73,766	68,573
Costs and estimated earnings in excess of billings	52,529	43,389
Prepaid expenses and other current assets	21,838	21,065
Total current assets	496,489	484,180
Property and equipment, net	45,264	35,454
Goodwill	92,395	92,395
Intangible assets, net	82,093	85,619
Deferred tax assets	16,815	19,009
Operating right of use assets	42,531	42,916
Other non-current assets	9,641	7,049
Total assets	785,228	766,622
Accounts payable and accrued expenses	232,548	249,114
Billings in excess of costs and estimated earnings	66,242	62,486
Total current liabilities	298,790	311,600
Long-term debt	67,827	39,746
Operating long-term lease liabilities	27,520	28,649
Other non-current liabilities	10,561	16,080
Total liabilities	404,698	396,075
Noncontrolling interest	24,070	24,594
Preferred stock, value	0	0
Common stock, value	220	220
Treasury stock, value	(30,460)	(29,300)
Additional paid-in capital	199,162	201,899
Retained earnings	187,538	173,134
Total stockholders' equity	356,460	345,953
Total liabilities and stockholders' equity	$ 785,228	$ 766,622

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ (2,497)	$ (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	20,788,085	20,732,531
Treasury Stock, Shares	1,261,444	1,316,998

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	$ 480,509	$ 314,838
Cost of services	400,782	256,159
Gross profit	79,727	58,679
Selling, general and administrative expenses	59,402	42,786
Contingent consideration	69	0
Loss (gain) on sale of assets	(5)	(10)
Operating income (loss)	20,261	15,903
Interest expense	436	172
Other (income) expense, net	765	(118)
Income (loss) from operations before income taxes	19,060	15,849
Provision for (benefit from) income taxes	3,981	3,639
Net income (loss)	15,079	12,210
Net income attributable to noncontrolling interest	(615)	(112)
Comprehensive income attributable to IES Holdings, Inc.	$ 14,464	$ 12,098
Earnings Per Share, Basic	$ 0.70	$ 0.58
Earnings Per Share, Diluted	$ 0.69	$ 0.58
Weighted Average Number of Shares Outstanding, Basic	20,702,844	20,734,516
Weighted Average Number of Shares Outstanding, Diluted	20,958,887	21,061,355

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				$ (741)	(741)
Issuances under compensation plans, shares				38,467
Acquisition of treasury stock	(695)			$ (1,226)	531
Acquisition of treasury stock, shares				(30,878)
Non-cash compensation	842				842
Noncontrolling Interest, Change in Redemption Value	(118)					(118)
Net income (loss) attributable to IES Holdings, Inc.	12,098					12,098
Stockholders' Equity Attributable to Parent at Dec. 31, 2020	295,462	$ (214)	$ 220	$ (24,984)	201,219	119,007	$ (214)
Shares, Issued at Dec. 31, 2020			22,049,529	1,279,545
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				$ (3,637)	(3,637)
Issuances under compensation plans, shares				157,167
Acquisition of treasury stock	(4,797)			$ (4,797)	0
Acquisition of treasury stock, shares				(101,613)
Non-cash compensation	900				900
Noncontrolling Interest, Change in Redemption Value	(60)					(60)
Net income (loss) attributable to IES Holdings, Inc.	14,464					14,464
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

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Cash Flows [Abstract]
Net income (loss)	$ 15,079	$ 12,210
Bad debt expense	92	(168)
Deferred financing cost amortization	47	46
Depreciation and amortization	6,214	4,020
Loss (gain) on sale of assets	5	10
Non-cash compensation expense	900	842
Deferred income taxes	2,195	2,751
Accounts receivable	(8,173)	6,008
Inventories	(5,192)	(4,320)
Costs and estimated earnings in excess of billings	(9,140)	6,101
Prepaid expenses and other current assets	(5,366)	(2,466)
Other non-current assets	(1,564)	(302)
Accounts payable and accrued expenses	(23,179)	(14,764)
Billings in excess of costs and estimated earnings	3,756	8,992
Other non-current liabilities	(137)	1,310
Net cash provided by operating activities	(24,463)	20,250
Purchases of property and equipment	(12,339)	(1,182)
Proceeds from sale of assets	84	12
Cash paid in conjunction with business combinations	(500)	(54,774)
Net cash used in investing activities	(12,755)	(55,944)
Borrowings of debt	444,159	25,115
Repayments of debt	(415,937)	(10,099)
Cash paid for finance leases	(270)	(110)
Distribution to noncontrolling interest	(1,215)	0
Purchase of treasury stock	(4,798)	(695)
Net cash used in financing activities	21,939	14,211
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(15,279)	(21,483)
CASH, CASH EQUIVALENTS, beginning of period		53,577
CASH, CASH EQUIVALENTS, end of period	7,826	32,094
Cash paid for interest	501	99
Cash paid for income taxes (net)	$ 9	$ 19

Business	12 Months Ended
Business	Sep. 30, 2021
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 December 31, 2021 had been redeemable at that date, the redemption amount would have been $19,680. 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	3 Months Ended
Controlling Shareholder	Dec. 31, 2021
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 January 31, 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 Associates in order to assist Tontine in managing its investment in the Company. Subject to the terms and conditions set forth in the Observer Agreement, the Company granted Tontine the right, at any time that Tontine holds at least 20% of the outstanding common stock of the Company, to appoint a representative to serve as an observer to the Board (the “Board Observer”). The Board Observer, who must be reasonably acceptable to those members of the Board who are not affiliates of Tontine, shall have no voting rights or other decision making authority. Subject to the terms and conditions set forth in the Observer Agreement, so long as Tontine has the right to appoint a Board Observer, the Board Observer will have the right to attend and participate in meetings of the Board and the committees thereof, subject to confidentiality requirements, and to receive reimbursement for reasonable out-of-pocket expenses incurred in his or her capacity as a Board Observer and such rights to coverage under the Company’s directors’ and officers’ liability insurance policy as are available to the Company’s directors.

Revenue Recognition

3 Months Ended

Dec. 31, 2021

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 months ended December 31, 2021 and 2020 was derived from the following activities. See details in the following tables:


	Three Months Ended December 31,
	2021		2020
Communications	$	127,389	$	98,356
Residential
Single-family	173,528		72,126
Multi-family and Other	68,248		47,365
Total Residential	241,776		119,491
Infrastructure Solutions
Industrial Services	14,816		10,040
Custom Power Solutions	27,280		24,361
Total Infrastructure Solutions	42,096		34,401
Commercial & Industrial	69,248		62,590
Total Revenue	$	480,509	$	314,838


	Three Months Ended December 31, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	88,422	$	241,776	$	40,453	$	64,860	$	435,511
Time-and-material			38,967		—		1,643		4,388		44,998
Total revenue		$	127,389	$	241,776	$	42,096	$	69,248	$	480,509

	Three Months Ended December 31, 2020
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	76,014	$	119,491	$	32,664	$	60,687	$	288,856
Time-and-material			22,342		—		1,737		1,903		25,982
Total revenue		$	98,356	$	119,491	$	34,401	$	62,590	$	314,838

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 December 31, 2021, Accounts receivable included $20,767 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 December 31, 2021 and 2020, we recognized revenue of $28,341 and $25,225 related to our contract liabilities at October 1, 2021 and 2020, respectively.

We did not have any impairment losses recognized on our receivables or contract assets for the three months ended December 31, 2021 or 2020.

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 December 31, 2021, we had remaining performance obligations of $721,126. The Company expects to recognize revenue on approximately $653,218 of the remaining performance obligations over the next 12 months, with the remaining recognized thereafter.

For the three months ended December 31, 2021, net revenue recognized from our performance obligations satisfied in previous periods was not material.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

Debt	3 Months Ended
Debt	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	4. DEBT At December 31, 2021 and September 30, 2021, we had $68,560 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 $39 and $63, respectively. At December 31, 2021, we also had $5,292 in outstanding letters of credit and total availability of $51,148 under our revolving credit facility without triggering our financial covenants under the Amended Credit Agreement (as defined below). We maintain a $125,000 revolving credit facility that matures on September 30, 2026, pursuant to our Second Amended and Restated Credit and Security Agreement with Wells Fargo (as amended, the "Amended Credit Agreement"). The Amended Credit Agreement contains customary affirmative, negative and financial covenants as disclosed in Item 7 of our Annual Report on Form 10-K for the year ended September 30, 2021. As of December 31, 2021, the Company was in compliance with the financial covenants under the Amended Credit Agreement.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Per Share Information

3 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

5. PER SHARE INFORMATION

The following tables reconcile the components of basic and diluted earnings per share for the three months ended December 31, 2021 and 2020:


	Three Months Ended December 31,
	2021		2020
Numerator:
Net income attributable to IES Holdings, Inc.	$	14,464	$	12,098
Increase (decrease) in noncontrolling interest		60		(118)
Net income attributable to restricted stockholders of IES Holdings, Inc.		11		12
Net income attributable to common stockholders of IES Holdings, Inc.	$	14,393	$	12,204

Denominator:
Weighted average common shares outstanding — basic		20,702,844		20,734,516
Effect of dilutive stock options and non-vested securities		256,043		326,839
Weighted average common and common equivalent shares outstanding — diluted		20,958,887		21,061,355

Earnings per share attributable to common stockholders of IES Holdings, Inc.:
Basic	$	0.70	$	0.58
Diluted	$	0.69	$	0.58

For the three months ended December 31, 2021 and 2020, the average price of our common shares exceeded the exercise price of all of our outstanding options; therefore, all of our outstanding stock options were included in the computation of diluted earnings per share.

Operating Segments

3 Months Ended

Dec. 31, 2021

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 office 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 and depreciation expense.

Segment information for the three months ended December 31, 2021 and 2020 is as follows:


		Three Months Ended December 31, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Corporate		Total
Revenues		$	127,389	$	241,776	$	42,096	$	69,248	$	—	$	480,509
Cost of services		106,891		199,138		34,375		60,378		—		400,782
Gross profit		20,498		42,638		7,721		8,870		—		79,727
Selling, general and administrative		11,384		30,995		6,059		7,268		3,696		59,402
Contingent consideration		—		69		—		—		—		69
Loss (gain) on sale of assets		(6)		8		—		(7)		—		(5)
Operating income (loss)		$	9,120	$	11,566	$	1,662	$	1,609	$	(3,696)	$	20,261
Other data:
	Depreciation and amortization expense	$	359	$	3,852	$	1,343	$	630	$	30	$	6,214
	Capital expenditures	$	594	$	1,184	$	10,316	$	245	$	—	$	12,339
	Total assets	$	161,419	$	338,824	$	145,722	$	94,157	$	45,106	$	785,228


		Three Months Ended December 31, 2020
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Corporate		Total
Revenues		$	98,356	$	119,491	$	34,401	$	62,590	$	—	$	314,838
Cost of services		79,817		95,963		23,464		56,915		—		256,159
Gross profit		18,539		23,528		10,937		5,675		—		58,679
Selling, general and administrative		9,341		17,327		5,611		6,424		4,083		42,786

Loss (gain) on sale of assets		—		—		(1)		(9)		—		(10)
Operating income (loss)		$	9,198	$	6,201	$	5,327	$	(740)	$	(4,083)	$	15,903
Other data:
	Depreciation and amortization expense	$	347	$	1,504	$	1,441	$	694	$	34	$	4,020
	Capital expenditures	$	132	$	437	$	345	$	268	$	—	$	1,182
	Total assets	$	137,457	$	198,227	$	129,283	$	72,148	$	72,255	$	609,370

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Stockholders' Equity	3 Months Ended
Stockholders' Equity	Dec. 31, 2021
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 715,054 shares were available for issuance at December 31, 2021. 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 56,415 shares of our common stock during the three months ended December 31, 2021 in open market transactions at an average price of $46.71 per share. We repurchased no shares of our common stock during the three months ended December 31, 2020 in open market transactions. Treasury Stock During the three months ended December 31, 2021, 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 three months ended December 31, 2020, 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. Restricted Stock We granted no restricted shares to executives during the three months ended December 31, 2021. 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 December 31, 2021 and 2020, we recognized $36 and $38, respectively, in compensation expense related to all restricted stock awards. At December 31, 2021, the unamortized compensation cost related to outstanding unvested restricted stock was $131. 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 December 31, 2021 and 2020, we recognized $96 and $96, 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. As of December 31, 2021, the Company had outstanding Employee PSUs, which, subject to the achievement of certain performance metrics, could result in the issuance of 321,463 shares of common stock. During the three months ended December 31, 2021, we granted 150,447 Employee PSUs, 4,962 were forfeited, and 106,964 vested. During the three months ended December 31, 2021 and 2020, we recognized $768 and $697, respectively, in compensation expense related to Employee PSU grants

Employee Benefit Plans	3 Months Ended
Employee Benefit Plans	Dec. 31, 2021
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 December 31, 2021 and 2020, we recognized $921 and $706, respectively, in matching expense.

Fair Value Measurements

3 Months Ended

Dec. 31, 2021

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 December 31, 2021, 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 December 31, 2021 and September 30, 2021, are summarized in the following tables by the type of inputs applicable to the fair value measurements:


	December 31, 2021
			Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable Inputs (Level 3)
Executive savings plan assets		$	955	$	955	$	—
Equity securities			1,206		1,206		—
Executive savings plan liabilities			(823)		(823)		—
Contingent consideration liability			(4,216)		—		(4,216)
Total		$	(2,878)	$	1,338	$	(4,216)


	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 December 31, 2021, we estimated the fair value of this contingent consideration liability at $4,216. 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		(35)
Fair value at December 31, 2021	$	(4,216)

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Inventory

3 Months Ended

Dec. 31, 2021

Inventory Disclosure [Abstract]

Inventory Disclosure [Text Block]

10. INVENTORY

Inventories consist of the following components:


	December 31,		September 30,
	2021		2021
Raw materials	$	6,030	$	5,819
Work in process		7,639		6,848
Finished goods		1,469		1,554
Parts and supplies		58,628		54,352
Total inventories	$	73,766	$	68,573

Goodwill and Intangible Assets

3 Months Ended

Dec. 31, 2021

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 December 31, 2021, which was unchanged from September 30, 2021:


	Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total




Goodwill at December 31, 2021	$	2,816	$	51,370	$	38,209	$	—	$	92,395

Intangible Assets

Intangible assets consist of the following:


	Estimated Useful Lives (in Years)			December 31, 2021
					Gross Carrying Amount		Accumulated Amortization		Net
Trademarks/trade names	5	-	20		$	15,262	$	(3,323)		$	11,939
Technical library	20				400		(166)			234
Customer relationships	6	-	15		96,879		(26,980)			69,899
Non-competition arrangements	5				40		(27)			13
Backlog and construction contracts	1				4,957		(4,949)			8
Total intangible assets					$	117,538	$	(35,445)		$	82,093


	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	3 Months Ended
Commitments and Contingencies	Dec. 31, 2021
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 dispute this claim, and plan to vigorously defend ourselves. To date, the Company has not established a reserve with respect to this matter, as we believe the likelihood of our responsibility for damages is not probable and a potential range of exposure is not reasonably estimable. 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 December 31, 2021 and September 30, 2021, we had $5,428 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 December 31, 2021 and September 30, 2021, $5,092 and $4,327, respectively, of our outstanding letters of credit was utilized to collateralize our insurance program. Surety As of December 31, 2021, the estimated cost to complete our bonded projects was approximately $75,455. 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. From time to time we may enter into firm purchase commitments for materials, such as copper or aluminum wire, which we expect to use in the ordinary course of business. These commitments are typically for terms of less than one year and require us to buy minimum quantities of materials at specific intervals at a fixed price over the term. As of December 31, 2021, we had commitments of $12,058 outstanding under agreements to purchase copper wire and other materials over the next 12 months in the ordinary course of business.

Leases

3 Months Ended

Dec. 31, 2021

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 $14,508 and $1,260, respectively, as of December 31, 2021, 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 December 31, 2021 are as follows:


	Operating Leases		Finance Leases		Total
Remainder of 2022	$	11,351	$	967	$	12,318
2023	11,795		1,286		13,081
2024	8,136		1,262		9,398
2025	5,709		1,059		6,768
2026	3,766		536		4,302
Thereafter	4,759		6		4,765
Total undiscounted lease payments	$	45,516	$	5,116	$	50,632
Less: imputed interest	3,489		413		3,902
Present value of lease liabilities	$	42,027	$	4,703	$	46,730

The total future undiscounted cash flows related to lease agreements committed to but not yet commenced as of December 31, 2021 is $1,819.

Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows:


	Three Months Ended
	December 31, 2021		December 31, 2020
Operating lease cost	$	3,287	$	3,246	$	0
Finance lease cost
Amortization of lease assets	176		109
Interest on lease liabilities	33		23
Finance lease cost	209		132
Short-term lease cost	330		313
Variable lease cost	321		289
Total lease cost	$	4,147	$	3,980

Other information about lease amounts recognized in our Condensed Consolidated Financial Statements is summarized as follows:


	Three Months Ended
	December 31, 2021		December 31, 2020
Operating cash flows used for operating leases	$	4,240	$	3,651
Operating cash flows used for finance leases	47		23
Right-of-use assets obtained in exchange for new operating lease liabilities	6,982		7,760
Right-of-use assets obtained in exchange for new finance lease liabilities	1,092		564


	December 31, 2021		September 30, 2021
Weighted-average remaining lease term - operating leases	4.3 years		5.0 years
Weighted-average remaining lease term - finance leases	4.2 years		4.2 years
Weighted-average discount rate - operating leases	3.4	%	3.7	%
Weighted-average discount rate - finance leases	4.2	%	4.3	%

Leases

13. LEASES

The maturities of our lease liabilities as of December 31, 2021 are as follows:


	Operating Leases		Finance Leases		Total
Remainder of 2022	$	11,351	$	967	$	12,318
2023	11,795		1,286		13,081
2024	8,136		1,262		9,398
2025	5,709		1,059		6,768
2026	3,766		536		4,302
Thereafter	4,759		6		4,765
Total undiscounted lease payments	$	45,516	$	5,116	$	50,632
Less: imputed interest	3,489		413		3,902
Present value of lease liabilities	$	42,027	$	4,703	$	46,730

The total future undiscounted cash flows related to lease agreements committed to but not yet commenced as of December 31, 2021 is $1,819.

Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows:


	Three Months Ended
	December 31, 2021		December 31, 2020
Operating lease cost	$	3,287	$	3,246	$	0
Finance lease cost
Amortization of lease assets	176		109
Interest on lease liabilities	33		23
Finance lease cost	209		132
Short-term lease cost	330		313
Variable lease cost	321		289
Total lease cost	$	4,147	$	3,980

Other information about lease amounts recognized in our Condensed Consolidated Financial Statements is summarized as follows:


	Three Months Ended
	December 31, 2021		December 31, 2020
Operating cash flows used for operating leases	$	4,240	$	3,651
Operating cash flows used for finance leases	47		23
Right-of-use assets obtained in exchange for new operating lease liabilities	6,982		7,760
Right-of-use assets obtained in exchange for new finance lease liabilities	1,092		564


	December 31, 2021		September 30, 2021
Weighted-average remaining lease term - operating leases	4.3 years		5.0 years
Weighted-average remaining lease term - finance leases	4.2 years		4.2 years
Weighted-average discount rate - operating leases	3.4	%	3.7	%
Weighted-average discount rate - finance leases	4.2	%	4.3	%

Business Combinations and Divestitures	3 Months Ended
Business Combinations and Divestitures	Dec. 31, 2021
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	14. BUSINESS COMBINATIONS AND DIVESTITURES We completed no acquisitions during the three months ended December 31, 2021. 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.In addition to the cash consideration, the purchase price included contingent consideration with respect to the acquisition of Bayonet of up to $4,500 due in December 2023. Amounts to be paid are contingent on earnings achieved over a three year period, and will accrue interest on the $4,500 at a rate of 3%, to be paid quarterly. This contingent liability was valued at $4,074 as of the date of the acquisition.

Revenue Recognition (Tables)

3 Months Ended

Dec. 31, 2021

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]


	Three Months Ended December 31,
	2021		2020
Communications	$	127,389	$	98,356
Residential
Single-family	173,528		72,126
Multi-family and Other	68,248		47,365
Total Residential	241,776		119,491
Infrastructure Solutions
Industrial Services	14,816		10,040
Custom Power Solutions	27,280		24,361
Total Infrastructure Solutions	42,096		34,401
Commercial & Industrial	69,248		62,590
Total Revenue	$	480,509	$	314,838


	Three Months Ended December 31, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	88,422	$	241,776	$	40,453	$	64,860	$	435,511
Time-and-material			38,967		—		1,643		4,388		44,998
Total revenue		$	127,389	$	241,776	$	42,096	$	69,248	$	480,509

	Three Months Ended December 31, 2020
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	76,014	$	119,491	$	32,664	$	60,687	$	288,856
Time-and-material			22,342		—		1,737		1,903		25,982
Total revenue		$	98,356	$	119,491	$	34,401	$	62,590	$	314,838

Per Share Information (Tables)

3 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	Three Months Ended December 31,
	2021		2020
Numerator:
Net income attributable to IES Holdings, Inc.	$	14,464	$	12,098
Increase (decrease) in noncontrolling interest		60		(118)
Net income attributable to restricted stockholders of IES Holdings, Inc.		11		12
Net income attributable to common stockholders of IES Holdings, Inc.	$	14,393	$	12,204

Denominator:
Weighted average common shares outstanding — basic		20,702,844		20,734,516
Effect of dilutive stock options and non-vested securities		256,043		326,839
Weighted average common and common equivalent shares outstanding — diluted		20,958,887		21,061,355

Earnings per share attributable to common stockholders of IES Holdings, Inc.:
Basic	$	0.70	$	0.58
Diluted	$	0.69	$	0.58

Operating Segments (Tables)

3 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]


		Three Months Ended December 31, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Corporate		Total
Revenues		$	127,389	$	241,776	$	42,096	$	69,248	$	—	$	480,509
Cost of services		106,891		199,138		34,375		60,378		—		400,782
Gross profit		20,498		42,638		7,721		8,870		—		79,727
Selling, general and administrative		11,384		30,995		6,059		7,268		3,696		59,402
Contingent consideration		—		69		—		—		—		69
Loss (gain) on sale of assets		(6)		8		—		(7)		—		(5)
Operating income (loss)		$	9,120	$	11,566	$	1,662	$	1,609	$	(3,696)	$	20,261
Other data:
	Depreciation and amortization expense	$	359	$	3,852	$	1,343	$	630	$	30	$	6,214
	Capital expenditures	$	594	$	1,184	$	10,316	$	245	$	—	$	12,339
	Total assets	$	161,419	$	338,824	$	145,722	$	94,157	$	45,106	$	785,228


		Three Months Ended December 31, 2020
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Corporate		Total
Revenues		$	98,356	$	119,491	$	34,401	$	62,590	$	—	$	314,838
Cost of services		79,817		95,963		23,464		56,915		—		256,159
Gross profit		18,539		23,528		10,937		5,675		—		58,679
Selling, general and administrative		9,341		17,327		5,611		6,424		4,083		42,786

Loss (gain) on sale of assets		—		—		(1)		(9)		—		(10)
Operating income (loss)		$	9,198	$	6,201	$	5,327	$	(740)	$	(4,083)	$	15,903
Other data:
	Depreciation and amortization expense	$	347	$	1,504	$	1,441	$	694	$	34	$	4,020
	Capital expenditures	$	132	$	437	$	345	$	268	$	—	$	1,182
	Total assets	$	137,457	$	198,227	$	129,283	$	72,148	$	72,255	$	609,370

Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]


	December 31, 2021
			Total Fair Value		Quoted Prices (Level 1)		Significant Unobservable Inputs (Level 3)
Executive savings plan assets		$	955	$	955	$	—
Equity securities			1,206		1,206		—
Executive savings plan liabilities			(823)		(823)		—
Contingent consideration liability			(4,216)		—		(4,216)
Total		$	(2,878)	$	1,338	$	(4,216)


	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		(35)
Fair value at December 31, 2021	$	(4,216)

Inventory (Tables)

3 Months Ended

Dec. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following components:


	December 31,		September 30,
	2021		2021
Raw materials	$	6,030	$	5,819
Work in process		7,639		6,848
Finished goods		1,469		1,554
Parts and supplies		58,628		54,352
Total inventories	$	73,766	$	68,573

Goodwill and Intangible Assets (Tables)

3 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]


	Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total




Goodwill at December 31, 2021	$	2,816	$	51,370	$	38,209	$	—	$	92,395

Schedule of Finite-Lived Intangible Assets [Table Text Block]


	Estimated Useful Lives (in Years)			December 31, 2021
					Gross Carrying Amount		Accumulated Amortization		Net
Trademarks/trade names	5	-	20		$	15,262	$	(3,323)		$	11,939
Technical library	20				400		(166)			234
Customer relationships	6	-	15		96,879		(26,980)			69,899
Non-competition arrangements	5				40		(27)			13
Backlog and construction contracts	1				4,957		(4,949)			8
Total intangible assets					$	117,538	$	(35,445)		$	82,093


	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)

3 Months Ended

Dec. 31, 2021

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity

The maturities of our lease liabilities as of December 31, 2021 are as follows:


	Operating Leases		Finance Leases		Total
Remainder of 2022	$	11,351	$	967	$	12,318
2023	11,795		1,286		13,081
2024	8,136		1,262		9,398
2025	5,709		1,059		6,768
2026	3,766		536		4,302
Thereafter	4,759		6		4,765
Total undiscounted lease payments	$	45,516	$	5,116	$	50,632
Less: imputed interest	3,489		413		3,902
Present value of lease liabilities	$	42,027	$	4,703	$	46,730

Lease, Cost

Lease cost recognized in our Condensed Consolidated Statements of Comprehensive Income is summarized as follows:


	Three Months Ended
	December 31, 2021		December 31, 2020
Operating lease cost	$	3,287	$	3,246	$	0
Finance lease cost
Amortization of lease assets	176		109
Interest on lease liabilities	33		23
Finance lease cost	209		132
Short-term lease cost	330		313
Variable lease cost	321		289
Total lease cost	$	4,147	$	3,980

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
	December 31, 2021		December 31, 2020
Operating cash flows used for operating leases	$	4,240	$	3,651
Operating cash flows used for finance leases	47		23
Right-of-use assets obtained in exchange for new operating lease liabilities	6,982		7,760
Right-of-use assets obtained in exchange for new finance lease liabilities	1,092		564


	December 31, 2021		September 30, 2021
Weighted-average remaining lease term - operating leases	4.3 years		5.0 years
Weighted-average remaining lease term - finance leases	4.2 years		4.2 years
Weighted-average discount rate - operating leases	3.4	%	3.7	%
Weighted-average discount rate - finance leases	4.2	%	4.3	%

Business (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Accounting Policies [Abstract]
Redeemable Noncontrolling Interest, Equity, Redemption Value	$ 19,680

Controlling Shareholder (Details) $ in Thousands	3 Months Ended
Controlling Shareholder (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Risks and Uncertainties [Abstract]
ControllingShareholderOwnershipPercentage	56.00%
Related Party Transaction, Purchases from Related Party	$ 8

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
Revenue Recognition (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Revenue Recognition and Deferred Revenue [Abstract]
Unbilled Receivables, Current	$ 20,767
Costs and estimated earnings in excess of billings	52,529		$ 43,389
Billings in excess of costs and estimated earnings	(66,242)		$ (62,486)
Contract with Customer, Liability, Revenue Recognized	28,341	$ 25,225
Performance Obligation Next 12 Months	653,218
Revenue, Remaining Performance Obligation, Amount	721,126
Disaggregation of Revenue [Line Items]
Revenues	480,509	314,838
Contract with Customer, Liability, Revenue Recognized	28,341	25,225
Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	69,248	62,590
Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	127,389	98,356
Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	42,096	34,401
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	241,776	119,491
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	435,511	288,856
Fixed-price Contract [Member] \| Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	64,860	60,687
Fixed-price Contract [Member] \| Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	88,422	76,014
Fixed-price Contract [Member] \| Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	40,453	32,664
Fixed-price Contract [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	241,776	119,491
Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	44,998	25,982
Time-and-materials Contract [Member] \| Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,388	1,903
Time-and-materials Contract [Member] \| Communications [Member]
Disaggregation of Revenue [Line Items]
Revenues	38,967	22,342
Time-and-materials Contract [Member] \| Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,643	1,737
Time-and-materials Contract [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0
industrial Services [Member] \| Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	14,816	10,040
Custom Power Solutions [Member] \| Infrastructure Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	27,280	24,361
Single Family Contracts [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	173,528	72,126
Multi Family and Other [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 68,248	$ 47,365

Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-term debt	$ 67,827	$ 39,746
Letters of Credit Outstanding, Amount	5,292
Line of Credit Facility, Remaining Borrowing Capacity	51,148
Loans Payable to Bank, Noncurrent		40,339
Other Long-term Debt, Noncurrent	39	$ 63
Line of Credit Facility, Maximum Borrowing Capacity	$ 125,000

Per Share Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	$ 14,464	$ 12,098
Noncontrolling Interest, Change in Redemption Value	60	118
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	11	12
Comprehensive income attributable to IES Holdings, Inc.	$ 14,464	$ 12,098
Weighted Average Number of Shares Outstanding, Basic	20,702,844	20,734,516
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	256,043	326,839
Weighted Average Number of Shares Outstanding, Diluted	20,958,887	21,061,355
Earnings Per Share, Basic	$ 0.70	$ 0.58
Earnings Per Share, Diluted	$ 0.69	$ 0.58

Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
Operating Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Segment Reporting Information [Line Items]
Cost of services	$ 400,782	$ 256,159
Gross profit	79,727	58,679
Selling, general and administrative expenses	59,402	42,786
Contingent consideration	69	0
Loss (gain) on sale of assets	(5)	(10)
Operating income (loss)	20,261	15,903
Depreciation and amortization expense	6,214	4,020
Capital expenditures	12,339	1,182
Total assets	785,228	609,370	$ 766,622
Revenues	480,509	314,838
Commercial and Industrial [Member]
Segment Reporting Information [Line Items]
Cost of services	60,378	56,915
Gross profit	8,870	5,675
Selling, general and administrative expenses	7,268	6,424
Loss (gain) on sale of assets	(7)	(9)
Operating income (loss)	1,609	(740)
Depreciation and amortization expense	630	694
Capital expenditures	245	268
Total assets	94,157	72,148
Revenues	69,248	62,590
Communications [Member]
Segment Reporting Information [Line Items]
Cost of services	106,891	79,817
Gross profit	20,498	18,539
Selling, general and administrative expenses	11,384	9,341
Loss (gain) on sale of assets	(6)	0
Operating income (loss)	9,120	9,198
Depreciation and amortization expense	359	347
Capital expenditures	594	132
Total assets	161,419	137,457
Revenues	127,389	98,356
Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Cost of services	34,375	23,464
Gross profit	7,721	10,937
Selling, general and administrative expenses	6,059	5,611
Loss (gain) on sale of assets	0	(1)
Operating income (loss)	1,662	5,327
Depreciation and amortization expense	1,343	1,441
Capital expenditures	10,316	345
Total assets	145,722	129,283
Revenues	42,096	34,401
Residential [Member]
Segment Reporting Information [Line Items]
Cost of services	199,138	95,963
Gross profit	42,638	23,528
Selling, general and administrative expenses	30,995	17,327
Contingent consideration	69
Loss (gain) on sale of assets	8	0
Operating income (loss)	11,566	6,201
Depreciation and amortization expense	3,852	1,504
Capital expenditures	1,184	437
Total assets	338,824	198,227
Revenues	241,776	119,491
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Cost of services	0	0
Gross profit	0	0
Selling, general and administrative expenses	3,696	4,083
Loss (gain) on sale of assets	0	0
Operating income (loss)	(3,696)	(4,083)
Depreciation and amortization expense	30	34
Capital expenditures	0	0
Total assets	45,106	72,255
Revenues	$ 0	$ 0

Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021	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
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
Treasury Stock Acquired, Average Cost Per Share		$ 46.71
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 131
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	45,198	16,882
Common Stock, Capital Shares Reserved for Future Issuance	715,054
Stock Repurchase Program, Number of Shares Authorized to be Repurchased					1,000,000.0	1,500,000
Treasury Stock Acquired, Average Cost Per Share		$ 46.71
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	$ 131
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	$ 38
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	96	96
Performance Based Phantom Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 768	$ 697
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired	101,613	30,878
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	73,627	38,087
Shares, Issued	1,261,444	1,279,545	1,316,998	1,287,134
Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Issued		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
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized	3,000,000.0
Repurchase Agreements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired		56,415

Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined Contribution Plan, Cost	$ 921	$ 706

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 955	$ 937
Investments, Fair Value Disclosure	1,206
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(823)	(806)
Business Combination, Contingent Consideration, Liability, Noncurrent	(4,216)	(4,181)
Fair Value, Net Asset (Liability)	2,878	4,050
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(35)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	955	937
Investments, Fair Value Disclosure	1,206
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(823)	(806)
Fair Value, Net Asset (Liability)	(1,338)	(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	(4,216)	(4,181)
Fair Value, Net Asset (Liability)	$ (4,216)	$ 4,181

Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Gross	$ 6,030	$ 5,819
Inventory, Work in Process, Gross	7,639	6,848
Inventory, Finished Goods, Gross	1,469	1,554
Other Inventory, Gross	58,628	54,352
Inventory, Net	$ 73,766	$ 68,573

Goodwill and Intangible Assets Goodwill (Details) $ in Thousands	Dec. 31, 2021 USD ($)
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 Assets Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 117,538		$ 117,538
Finite-Lived Intangible Assets, Accumulated Amortization	(35,445)		(31,919)
Intangible Assets, Net (Excluding Goodwill)	82,093		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	(3,323)		(2,891)
Intangible Assets, Net (Excluding Goodwill)	$ 11,939		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	(166)		(161)
Intangible Assets, Net (Excluding Goodwill)	234		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	(26,980)		(24,021)
Intangible Assets, Net (Excluding Goodwill)	$ 69,899		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	(27)		(25)
Intangible Assets, Net (Excluding Goodwill)	$ 13		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	(4,949)		(4,821)
Intangible Assets, Net (Excluding Goodwill)	$ 8		$ 136

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Accrued Insurance, Current	$ 5,428	$ 5,787
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	5,292
Estimated cost of completion of bonded projects	75,455
Purchase Commitment, Remaining Minimum Amount Committed	12,058
Insurance Related [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	$ 5,092	$ 4,327

Leases (Details) - USD ($)	3 Months Ended
Leases (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Leases [Abstract]
Operating Lease, Liability, Current	$ 14,508,000		$ 13,973,000
Finance Lease, Liability, Current	1,260,000		$ 1,033,000
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	11,351,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	11,795,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,136,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	5,709,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,766,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	4,759,000
Lessee, Operating Lease, Liability, Payments, Due	45,516,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	3,489,000
Operating Lease, Liability	42,027,000
Finance Lease, Liability, Payments, Due Next Twelve Months	967,000
Finance Lease, Liability, Payments, Due Year Two	1,286,000
Finance Lease, Liability, Payments, Due Year Three	1,262,000
Finance Lease, Liability, Payments, Due Year Four	1,059,000
Finance Lease, Liability, Payments, Due Year Five	536,000
Finance Lease, Liability, Payments, Due after Year Five	6,000
Finance Lease, Liability, Payment, Due	5,116,000
Finance Lease, Liability, Undiscounted Excess Amount	413,000
Finance Lease, Liability	4,703,000
Lessee, Total Lease, Liability, Payments, Remainder of Fiscal Year [Line Items]	12,318,000
Total Lease, Liability, Payments, Year Two	13,081,000
Total Lease, Liability, Payments, Year Three	9,398,000
Total Lease, Liability, Payments, Year Four	6,768,000
Total Lease, Liability, Payments, Year Five	4,302,000
Total Lease, Liability, Payments, Due After Year Five	4,765,000
Total Lease, Liability, Payments Due	50,632,000
Total Lease, Liability, Undiscounted Excess Amount	3,902,000
Total Lease, Liability	46,730,000
Lessee, Operating Lease, Lease Not yet Commenced, Description	1,819,000
Operating Lease, Cost	3,287,000	$ 3,246,000
Finance Lease, Right-of-Use Asset, Amortization	176,000	109,000
Finance Lease, Interest Expense	33,000	23,000
Finance Lease, Cost	209,000	132,000
Short-term Lease, Cost	330,000	313,000
Variable Lease, Cost	321,000	289,000
Lease, Cost	4,147,000	3,980,000
Operating Lease, Payments	4,240,000	3,651,000
Finance Lease, Interest Payment on Liability	47,000	23,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	6,982,000	7,760,000
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1,092,000	$ 564,000
Operating Lease, Weighted Average Remaining Lease Term	4 years 3 months 18 days		5 years
Finance Lease, Weighted Average Remaining Lease Term	4 years 2 months 12 days		4 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.40%		3.70%
Finance Lease, Weighted Average Discount Rate, Percent	4.20%		4.30%

Business Combinations and Divestitures (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021
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	$ 19,680
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		$ 4,074