Total Lease, Liability, Payments, Year Three Total Lease, Liability, Payments, Year Three Total Lease, Liability, Payments, Year Three Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Pay vs Performance Disclosure [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Underlying Security Market Price Change Underlying Security Market Price Change, Percent Redeemable Noncontrolling Interest, Equity, Redemption Value Redeemable Noncontrolling Interest, Equity, Redemption Value Revenue from External Customers by Products and Services Revenue from External Customers by Products and Services [Table Text Block] Award Type [Domain] Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Total Lease, Liability Total Lease, Liability Total Lease, Liability Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Debt Disclosure [Text Block] Debt Disclosure [Text Block] Borrowings of debt Proceeds from Issuance of Long-Term Debt and Capital Securities, Net Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Performance Based Phantom Shares [Member] Performance Shares [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Restatement Determination Date: Restatement Determination Date [Axis] Other non-current liabilities Increase (Decrease) in Other Noncurrent Liabilities Insider Trading Policies and Procedures [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, to be Paid, Year Five Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Other non-current assets Increase (Decrease) in Other Noncurrent Assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Description and Basis of Presentation [Text Block] Business Description and Basis of Presentation [Text Block] Billings in excess of costs and estimated earnings Increase (Decrease) in Contract with Customer, Liability Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Preferred stock, value Preferred Stock, Value, Issued Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Earnings Per Share, Diluted Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Treasury stock, value Treasury Stock, Value Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Treasury Stock, Shares Treasury Stock, Common, Shares Total Lease, Liability, Payments, Due After Year Five Total Lease, Liability, Payments, Due After Year Five Total Lease, Liability, Payments, Due After Year Five Loans Payable to Bank, Noncurrent Loans Payable to Bank, Noncurrent Options exercised Stock Issued During Period, Value, Stock Options Exercised Trading Symbol Trading Symbol Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Cash paid in conjunction with business combinations Payments to Acquire Equity Method Investments Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Noncompete Agreements [Member] Noncompete Agreements [Member] Investments, Fair Value Disclosure Investments, Fair Value Disclosure Comprehensive income attributable to IES Holdings, Inc. Net income (loss) attributable to IES Holdings, Inc. 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[Abstract] Name Outstanding Recovery, Individual Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Leases [Abstract] Leases [Abstract] Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Finance Lease, Liability, Payment, Due Finance Lease, Liability, to be Paid Operating Lease, Payments Operating Lease, Payments Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Communications [Member] Communications [Member] Communications [Member] Noncontrolling Interest, Change in Redemption Value Noncontrolling Interest, Change in Redemption Value Undistributed Earnings (Loss) Available to Common Shareholders, Basic Undistributed Earnings (Loss) Available to Common Shareholders, Basic PEO PEO [Member] Shares, Outstanding Shares, Outstanding Common Stock, Par or Stated Value Per Share Common Stock, 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(Liability) Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Insurance Related [Member] Insurance Related [Member] Insurance Related Coverage Income (loss) from operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Infrastructure Solutions [Member] Infrastructure Solutions [Member] Infrastructure Solutions [Member] Entity Emerging Growth Company Entity Emerging Growth Company Capital expenditures Capital expenditures Payments to Acquire Productive Assets Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Intangible Assets, Net (Excluding Goodwill) Inventory, 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Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Costs and estimated earnings in excess of billings Contract with Customer, Asset, before Allowance for Credit Loss, Current Cash paid for finance leases Proceeds from (Repayments of) Other Long-Term Debt Retained Earnings [Member] Retained Earnings [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Total liabilities and stockholders' equity Liabilities and Equity Other non-current assets Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Earnings Per Share, Basic Earnings Per Share, Basic Operating right of use assets Operating Lease, Right-of-Use Asset Accounting Policies [Abstract] Accounting Policies [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Loss (gain) on sale of assets Gain (Loss) on Disposition of Assets Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Arrangement Duration Trading Arrangement Duration Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Stock Issued During Period, Shares, Treasury Stock Reissued Stock Issued During Period, Shares, Treasury Stock Reissued Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Business Combinations [Abstract] Business Combinations [Abstract] Termination Date Trading Arrangement Termination Date Common Stock, Shares Authorized Common Stock, Shares Authorized Inventory, Raw Materials, Gross Inventory, Raw Materials, Gross Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Phantom Share Units (PSUs) [Member] Phantom Share Units (PSUs) [Member] All Trading Arrangements All Trading Arrangements [Member] Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal All Adjustments to Compensation All Adjustments to Compensation [Member] Award Timing Disclosures [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Contracts Receivable, Claims and Uncertain Amounts Contracts Receivable, Claims and Uncertain Amounts Bad debt expense Accounts Receivable, Credit Loss Expense (Reversal) Additional paid-in capital Additional Paid in Capital Deferred income taxes Deferred Income Tax Expense (Benefit) Options exercised Proceeds from Stock Options Exercised Backlog [Member] Order or Production Backlog [Member] Finance Lease, Liability Finance Lease, Liability Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Inventory, Work in Process, Gross Inventory, Work in Process, Gross Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Insider Trading Arrangements [Line Items] Proceeds from Divestiture of Businesses, Net of Cash Divested Proceeds from Divestiture of Businesses, Net of Cash Divested Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Issuances under compensation plans, shares Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Registrant Name Entity 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Integration Related Costs Name Trading Arrangement, Individual Name Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Equity [Abstract] Equity [Abstract] Inventory Disclosure [Text Block] Inventory Disclosure [Text Block] Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Lessee, Total Lease, Liability, Payments, Remainder of Fiscal Year [Line Items] Lessee, Total Lease, Liability, Payments, Remainder of Fiscal Year Lessee, Total Lease, Liability, Payments, Remainder of Fiscal Year Amendment Flag Amendment Flag industrial Services [Member] industrial Services [Member] industrial Services [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Loss Contingency, Receivable Loss Contingency, Receivable Acquisition of treasury stock, shares Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired ControllingShareholderOwnershipPercentage ControllingShareholderOwnershipPercentage Percentage of outstanding common stock owned by controlling shareholder Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Payments for Repurchase of Redeemable Noncontrolling Interest Payments for Repurchase of Redeemable Noncontrolling Interest Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Finance Lease, Liability, Undiscounted Excess Amount Finance Lease, Liability, Undiscounted Excess Amount Revenue from External Customers by Products and Services [Table Text Block] Revenue from Contract with Customer [Text Block] Residential [Member] Residential [Member] Residential [Member] Company Selected Measure Amount Company Selected Measure Amount Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Total Lease, Liability, Payments, Year Four Total Lease, Liability, Payments, Year Four Total Lease, Liability, Payments, Year Four Total assets Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Share Repurchase Program [Axis] Share Repurchase Program [Axis] Finance Lease, Liability, Payments, Due after Year Five Finance Lease, Liability, to be Paid, after Year Five Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover page. Cover [Abstract] Non-cash compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Deferred financing cost amortization Amortization of Debt Issuance Costs Number of Businesses Acquired Number of Businesses Acquired Finance Lease, Interest Payment on Liability Finance Lease, Interest Payment on Liability Other non-current liabilities Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, to be Paid Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Related Party Transaction, Purchases from Related Party Related Party Transaction, Purchases from Related Party Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Time-and-materials Contract [Member] Time-and-Materials Contract [Member] Equity Component [Domain] Equity Component [Domain] Finance Lease, Liability, Current Finance Lease, Liability, Current Adjustment to Compensation: Adjustment to Compensation [Axis] us-gaap_PhantomShareUnitsPSUsMember_Employees Phantom Share Units, Employee PSUs [Member] Phantom Share Units, Employee PSUs Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Commercial and Industrial [Member] Commercial and Industrial [Member] Commercial and Industrial [Member] Controlling Shareholder [Text Block] Controlling Shareholder [Text Block] Controlling Shareholder [Text Block] Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Fixed-price Contract [Member] Fixed-Price Contract [Member] Operating income (loss) Operating income (loss) Operating Income (Loss) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Customer Relationships [Member] Customer Relationships [Member] Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased