Supplemental cash flow information: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Long-term finance and operating lease obligations Lease, Liability, Noncurrent Lease, Liability, Noncurrent Operating Lease Obligations Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Net contract assets (liabilities), Change Increase (Decrease) in Net Contract Assets Liabilities The amount of increase (decrease) in net contract assets (liabilities) during the year. Adjustments to reconcile net income to net cash flows provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Range [Domain] Statistical Measurement [Domain] Contract retainages, net, Change Increase (Decrease) In Contract Receivable Retainage The increase (decrease) during the reporting period of the amount of contract receivable retainage. Remaining availability to repurchase shares Share Repurchase Program, Remaining Authorized, Amount Schedule of lease costs Lease, Cost [Table Text Block] Contract assets, net of allowances of $619 and $610, respectively Contract assets, net Contract assets, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Cover [Abstract] Cover [Abstract] Fixed price Fixed-Price Contract [Member] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Net decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Schedule of future minimum operating lease payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Other current liabilities Other Liabilities, Current Trading Symbol Trading Symbol Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Non-NEOs Non-NEOs [Member] Employees Employees [Member] Schedule of weighted average number of common shares used to compute basic and dilute earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Other Commitments [Line Items] Other Commitments [Line Items] Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Insurance program obligations Insurance Program Obligations [Member] Insurance Program Obligations Percentage of capital stock from direct foreign subsidiaries Percentage of Capital Stock From Direct Foreign Subsidiaries Percentage of capital stock from direct foreign subsidiaries pledged as collateral for a debt. Pay vs Performance Disclosure [Line Items] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Employees Share-Based Payment Arrangement, Employee [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurements Fair Value Disclosures [Text Block] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Award Timing Disclosures [Line Items] Percentage of potential target shares awarded Share Based Compensation Arrangement By Share Based Payment Award Potential Payout As Percentage Of Target Shares The percentage of target shares, an employee can earn, under the plan. Contract Assets and Liabilities Long-Term Contracts or Programs Disclosure [Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Lease Obligations Lessee, Operating Leases [Text Block] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Operating lease cost Operating Lease, Cost Lease cost: Lease, Cost [Abstract] Operating lease obligations, net of current maturities Operating lease obligations Operating Lease, Liability, Noncurrent Interest on lease liabilities Finance Lease, Interest Expense Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract liabilities Contract liabilities Contract liabilities Contract with Customer, Liability, Current Plan Name [Domain] Plan Name [Domain] Weighted average dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Other assets Other Assets, Noncurrent Entity Tax Identification Number Entity Tax Identification Number Leases [Abstract] Leases [Abstract] Schedule of total debt Schedule of Long-Term Debt Instruments [Table Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Operating Segments Operating Segments [Member] Net cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Secured debt Secured Debt [Member] Share repurchases not settled Repurchase Of Common Stock, Not Settled Repurchase Of Common Stock, Not Settled Plan Name [Axis] Plan Name [Axis] Thereafter Finance Lease, Liability, to be Paid, after Year Five Equity Components [Axis] Equity Components [Axis] Total minimum lease payments Finance Lease, Liability, to be Paid Prepaid expenses and other current assets Other Assets, Current Award Timing Method Award Timing Method [Text Block] Remainder of 2024 Lease, Liability, To Be Paid, Remainder of Fiscal Year Lease, Liability, To Be Paid, Remainder of Fiscal Year Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Current portion of receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Current Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Weighted-average remaining lease term - finance leases Finance Lease, Weighted Average Remaining Lease Term Insider Trading Policies and Procedures [Line Items] Use of Estimates Use of Estimates, Policy [Policy Text Block] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Additional paid-in capital Additional Paid in Capital, Common Stock Compensation Amount Outstanding Recovery Compensation Amount Purchase orders outstanding Purchase Commitment, Remaining Minimum Amount Committed Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Entity Small Business Entity Small Business Company Selected Measure Amount Company Selected Measure Amount Tabular List, Table Tabular List [Table Text Block] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Five Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Cash paid for amounts included in the measurement of lease liabilities Cash Flow, Operating Activities, Lessee [Abstract] Share repurchases under share repurchase program Stock Repurchased During Period, Value Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Antidilutive securities excluded from computation of earnings (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Operating lease expense Operating Lease, Expense Financing component Finance Lease, Liability, Undiscounted Excess Amount Schedule of amount of the remaining performance obligations that the company reasonably estimates will not be recognized within the next twelve months Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Credit Facility [Domain] Credit Facility [Domain] Beginning of period End of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Organization Consolidation and Presentation of Financial Statements [Table] Organization Consolidation and Presentation of Financial Statements [Table] Current assets: Assets, Current [Abstract] Goodwill Goodwill Consolidation Items [Axis] Consolidation Items [Axis] Increase (decrease) in consolidated gross margin Cost Estimate Revision Gross Margin Increase Decrease Percentage Percentage of increase (decrease) cost estimate revision gross margin. Payments related to tax withholding for stock-based compensation Payments related to tax withholding for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Repurchase program authorized amount Share Repurchase Program, Authorized, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Shares vested, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Depreciation and amortization of property and equipment Depreciation 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Other financing activities Proceeds from (Payments for) Other Financing Activities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Accrued income taxes Accrued Income Taxes, Current Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Repayments under revolving lines of credit Repayments of Lines of Credit 2027 Lease, Liability, To Be Paid, Year Three Lease, Liability, To Be Paid, Year Three Security Exchange Name Security Exchange Name Interest rate margin Debt Instrument, Basis Spread on Variable Rate 2025 Finance Lease, Liability, to be Paid, Year One Award Type [Axis] Award Type [Axis] Revenue recognized, related to change orders and claims included as contract price adjustments Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price Equipment Note 10 Equipment Note Ten [Member] Equipment Note Ten Total liabilities Liabilities Electrical construction Market Type Electrical Construction [Member] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Revolving loans Revolving Credit Facility [Member] Expiration Date Trading Arrangement Expiration Date Right-of-use asset obtained in exchange for new finance lease obligations Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Certain Performance Targets Certain Performance Targets [Member] Certain Performance Targets Current portion of operating lease obligations Operating lease obligations Less: current portion of finance and operating lease obligations Operating Lease, Liability, Current Total Shareholder Return Amount Total Shareholder Return Amount Common stock, shares issued (in shares) Common Stock, Shares, Issued Equipment Note 8 Equipment Note Eight [Member] Represents the information pertaining to equipment Note 8. Total lease obligations Lease Obligation Total Represent the lease obligation, total. Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Concentration risk, Percent Concentration Risk, Percentage Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Finance Lease Obligations Finance Lease, Liability [Abstract] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Total Lease Obligations Total Lease Obligations [Abstract] Total Lease Obligations Debt Instrument [Line Items] Debt Instrument [Line Items] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Property and equipment, accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Diluted (in shares) Weighted average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Term of master service agreements Master Service Agreements, Term Term of master service agreements ("MSAs"), in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Number of equipment notes (equipment note) Debt Instrument Number Of Debt Instruments The number of debt instruments. Concentration Risk Type [Domain] Concentration Risk Type [Domain] Letters of credit outstanding Letters of Credit Outstanding, Amount Selling, general and administrative expenses Selling, General and Administrative Expense Contingent earn-out consideration, post acquisition term Business Combination, Contingent Consideration Arrangements, Performance Objectives, Post-Acquisition Period Business Combination, Contingent Consideration Arrangements, Performance Objectives, Post-Acquisition Period Accounts receivable, net of allowances of $898 and $1,987, respectively Accounts Receivable, after Allowance for Credit Loss, Current Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Other liabilities Increase (Decrease) in Other Operating Liabilities Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Total debt Long-Term Debt Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Operating And Finance Leases [Line Items] Operating And Finance Leases [Line Items] n/a Document Fiscal Period Focus Document Fiscal Period Focus 2028 Long-Term Debt, Maturity, Year Four All Executive Categories All Executive Categories [Member] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] ASSETS Assets [Abstract] Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Document Type Document Type Letter of credit facility commitment percentage Line of Credit Facility, Commitment Fee Percentage Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Schedule of segment's internal financial reports Schedule of Segment Reporting Information, by Segment [Table Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Shares repurchased, weighted average price per share (in dollars per share) Shares Acquired, Average Cost Per Share 2028 Lease, Liability, To Be Paid, Year Four Lease, Liability, To Be Paid, Year Four Investment in joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Receivable for insurance claims in excess of deductibles Increase (Decrease) in Insurance Settlements Receivable 2027 Finance Lease, Liability, to be Paid, Year Three Summary of the lease terms and discount rates Schedule Of Summary Of The Lease Terms And Discount Rates [Table Text Block] Schedule of summary of the lease terms and discount rates. Shares vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Schedule of contract assets and liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Maximum Maximum [Member] Amortization of intangible assets Amortization of Intangible Assets Preferred stock—$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at June 30, 2024 and December 31, 2023 Preferred Stock, Value, Outstanding Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Accounts payable Accounts Payable, Current LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities Liabilities [Abstract] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Financing component Lessee, Operating Lease, Liability, Undiscounted Excess Amount Organization Consolidation and Presentation of Financial Statements [Line Items] Organization Consolidation and Presentation of Financial Statements [Line Items] Total lease cost Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] PEO Name PEO Name Net Period [Axis] Net Period [Axis] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income (loss) before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Grantee Status [Domain] Grantee Status [Domain] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Equity Award [Domain] Award Type [Domain] Name Outstanding Recovery, Individual Name Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Non-performance letters of credit Nonperformance Letters Of Credit [Member] Stock issued under compensation plans, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Contract Performance Obligations Contract Performance Obligations [Member] Contract Performance Obligations Variable lease costs Variable Lease, Cost Schedule of shared excluded from calculation of dilute securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Title of Individual [Axis] Title and Position [Axis] Master loan agreement Master Loan Agreement [Member] Master Loan Agreement [Member]. Time Vested Stock Awards Time Vested Stock Awards [Member] Time Vested Stock Awards Member Additional Paid-In Capital Additional Paid-in Capital [Member] Finance lease obligations, net of current maturities Finance Lease, Liability, Noncurrent Award Timing Predetermined Award Timing Predetermined [Flag] Contract assets, net Changes in contract assets, net, Change Contract assets, net, Change Increase (Decrease) in Contract with Customer, Asset Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Diluted (in dollars per share) Increase (decrease) in diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Relationship to Entity [Domain] Title and Position [Domain] 2028 Finance Lease, Liability, to be Paid, Year Four Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Performance Guarantee Performance Guarantee [Member] Contract liabilities Contract liabilities, Change Increase (Decrease) in Contract with Customer, Liability Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Foreign currency gains (losses) Gain (Loss), Foreign Currency Transaction, before Tax Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Income tax expense (benefit) Income Tax Expense (Benefit) Other income (expense): Nonoperating Income (Expense) [Abstract] Stated Interest Rate (per annum) Debt Instrument, Interest Rate, Stated Percentage Corporate, Non-Segment Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Other information: Supplemental Cash Flow Information [Abstract] Total non-current obligations Lease Obligation Noncurrent Represent the lease obligation noncurrent. Distribution Market Type Distribution [Member] Summary of supplemental cash flow information Schedule Of Lease Supplemental Cash Flow And Other Disclosures [Table Text Block] Tabular disclosure of lease supplemental cash flow and other disclosures. Contract revenues Contract revenues: Revenue from Contract with Customer, Excluding Assessed Tax Total right-of-use lease assets Operating and Finance Lease Right of Use Asset Represent the operating and finance lease right-of-use asset. Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Net cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities Income (loss) from operations Increase (decrease) in operating income Income (loss) from operations: Operating Income (Loss) Interest expense Interest Expense, Operating and Nonoperating Variable Rate [Domain] Variable Rate [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Joint Ventures and Noncontrolling Interests Equity Method Investments [Policy Text Block] Remainder of 2024 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Number of business segments (segment) Number of business segments (segment) Number of Reportable Segments Total liabilities and shareholders’ equity Liabilities and Equity Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] All Adjustments to Compensation All Adjustments to Compensation [Member] Contingencies Excluding Wildfire and Health Insurance Contingencies Excluding Wildfire And Health Insurance [Member] Contingencies Excluding Wildfire and Health Insurance [Member] Bonds outstanding Guarantor Obligations, Maximum Exposure, Undiscounted 2026 Finance Lease, Liability, to be Paid, Year Two Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Interest income Investment Income, Interest Unit price Unit Price Contract [Member] Schedule of remaining principal payments for long term obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Organization, Business and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Right-of-use asset obtained in exchange for new operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Underlying Security Market Price Change Underlying Security Market Price Change, Percent Individual: Individual [Axis] Debt instrument covenant leveraged debt ratio restriction Debt Instrument Covenant Leveraged Debt Ratio Restriction Threshold of debt coverage ration at which the credit agreement restricts certain types of payments. Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Remaining performance obligation, term Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Schedule of net asset position for contracts in process Long-Term Contract or Program Disclosure [Table Text Block] 2017 Long-Term Incentive Plan 2017 Long-Term Incentive Plan [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity Address, State or Province Entity Address, State or Province Statement [Line Items] Statement [Line Items] Total minimum lease payments Lease, Liability, To Be Paid Lease, Liability, To Be Paid Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Credit agreement Credit Agreement [Member] Credit Agreement [Member]. Minimum Minimum [Member] Restatement Determination Date Restatement Determination Date Debt refinancing costs Payments of Debt Restructuring Costs Adoption Date Trading Arrangement Adoption Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Unbilled revenue, net, Change Revenue From Contract With Customer Increase (Decrease) In Unbilled Receivables The amount of contract with customer, increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts. Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Segments [Axis] Segments [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Exercise Price Award Exercise Price T&D Transmission And Distribution [Member] Earnings Per Share Earnings Per Share [Text Block] Arrangement Duration Trading Arrangement Duration 2026 Lease, Liability, To Be Paid, Year Two Lease, Liability, To Be Paid, Year Two Deferred revenue Deferred revenue Contract With Customer Liability Excluding Provision For Loss On Contracts Current Its represent the contract with customer, liability excluding provision for loss on contracts, current. Lease Obligations Lessee, Finance Leases [Text Block] Shareholders’ equity: Equity, Attributable to Parent [Abstract] Shares granted, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsidiaries Subsidiaries [Member] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Segments [Domain] Segments [Domain] Schedule of future minimum finance lease payments Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Term (years) Debt instrument term Debt Instrument, Term Net present value of minimum lease payments Finance Lease, Liability All Individuals All Individuals [Member] Borrowings under revolving lines of credit Proceeds from Lines of Credit PEO PEO [Member] Variable Rate [Axis] Variable Rate [Axis] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Lease amortization period Lessee Operating Lease Amortization Period It represents Lessee Operating Lease Amortization Period. Name Trading Arrangement, Individual Name Other income (expense), net Other Nonoperating Income (Expense) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Intangible assets, net of accumulated amortization of $32,688 and $30,534, respectively Intangible Assets, Net (Excluding Goodwill) Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Remainder of 2024 Long-Term Debt, Maturity, Remainder of Fiscal Year Commitment fee on unused capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Related Party [Domain] Related and Nonrelated Parties [Domain] Balance, beginning of period (in shares) Balance, end of period (in shares) Shares, Outstanding C&I Commercial And Industrial [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Powerline Plus Companies Powerline Plus Companies [Member] Powerline Plus Companies Accrued loss provision Provision for Loss on Contracts Local Phone Number Local Phone Number Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract] Short termination notice of master service agreements Master Service Agreements, Term of Short Termination Notice Short termination notice of master service agreements ("MSAs"), in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact Liability Class [Axis] Liability Class [Axis] Assets Servicing Asset [Abstract] Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Deferred debt issuance costs Debt Issuance Costs, Line of Credit Arrangements, Net Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Share repurchases under share repurchase program (in shares) Shares repurchased under repurchase program (in shares) Stock Repurchased During Period, Shares Service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Other assets Increase (Decrease) in Other Operating Assets Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Non-current Liabilities, Noncurrent [Abstract] PEO Total Compensation Amount PEO Total Compensation Amount Schedule of Contractors [Table] Schedule of Contractors [Table] n/a Summary of the lease-related assets and liabilities Schedule of Supplemental Balance Sheet Information Related to Leases [Table Text Block] Schedule of supplemental balance sheet information related to leases. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Common Stock Common Stock [Member] Measure: Measure [Axis] Health Insurance Health Insurance [Member] Health Insurance [Member] Stock issued under compensation plans, net Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Net contract assets Net Contract Assets (Liabilities) The amount of net contract assets (liabilities) as at balance sheet period. Entity Emerging Growth Company Entity Emerging Growth Company Segment Reporting [Abstract] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key 2029 Long-Term Debt, Maturity, Year Five Estimated remaining costs for bonded projects Guarantor Obligations Expected Costs Its represents the guarantor obligations expected costs. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Component [Domain] Equity Component [Domain] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share T&E Te Contract [Member] Segment Information Segment Reporting Disclosure [Text Block] Current portion of long-term debt Less: current portion of long-term debt Less: current portion of equipment notes Long-Term Debt, Current Maturities Performance letters of credit Performance Letters Of Credit [Member] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Change in contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Contractors [Line Items] Contractors [Line Items] n/a Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Title Trading Arrangement, Individual Title Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Statement [Table] Statement [Table] Change Net Period Change [Member] Unrecognized tax benefits Unrecognized Tax Benefits Consolidation Items [Domain] Consolidation Items [Domain] City Area Code City Area Code Current liabilities: Current Liabilities, Current [Abstract] Contingent earn-out consideration Business Combination, Contingent Consideration, Liability Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Noncash financing activities: Noncash Investing and Financing Items [Abstract] Term Benchmark Rate Term Benchmark Rate [Member] Term Benchmark Rate Preferred Stock Preferred Stock [Member] Repurchase of common stock Payments for Repurchase of Common Stock 2027 Long-Term Debt, Maturity, Year Three Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Long-term debt Long-term principal obligations Long-Term Debt, Excluding Current Maturities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Income Taxes Income Tax Disclosure [Text Block] Shares repurchased related to tax withholding for stock-based compensation Stock Repurchased and Retired During Period, Value 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Income (loss) per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Shares repurchased related to tax withholding for stock-based compensation (in shares) Shares repurchased related to tax withholding for stock-based compensation (in shares) Stock Repurchased and Retired During Period, Shares Contract assets, allowance Allowance for doubtful accounts associated with contract assets Contract with Customer, Asset, Allowance for Credit Loss, Current Accrued self-insurance Self Insurance Reserve, Noncurrent 2026 Long-Term Debt, Maturity, Year Two Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Option to extend lease term (up to) Lessee Operating and Finance Leases Option to Extend Term Lessee, operating and finance leases, option to extend, term. Net present value of minimum lease payments Operating Lease, Liability Other equipment note Other Equipment Note [Member] Other Equipment Note Net cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Performance Awards Performance Shares [Member] Weighted average interest rate Line of Credit Facility, Interest Rate During Period Credit Facility [Axis] Credit Facility [Axis] Net present value of minimum lease payments Lease, Liability Lease, Liability Letters Of Credit, Discretional Letters Of Credit, Discretional [Member] Letters Of Credit, Discretional 2029 Finance Lease, Liability, to be Paid, Year Five Amendment Flag Amendment Flag Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Entity Registrant Name Entity Registrant Name Gain on sale of property and equipment Gain on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Gross profit Gross Profit Fair Value as of Grant Date Award Grant Date Fair Value Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Debt Debt Disclosure [Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Schedule of revenue by contract and market type Disaggregation of Revenue [Table Text Block] Unbilled revenue, net Unbilled revenue Unbilled Contracts Receivable Entity Address, Postal Zip Code Entity Address, Postal Zip Code Interim Consolidated Financial Information Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,648,028 and 16,684,492 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively Common Stock, Value, Issued Receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Noncurrent Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Total current obligations Lease Obligation Current Represents the lease obligation, current Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Grantee Status [Axis] Grantee Status [Axis] Contracts Accounted for under Percentage of Completion Contracts Accounted for under Percentage of Completion [Member] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Non-employee Directors Share-Based Payment Arrangement, Nonemployee [Member] Financing component Lease, Liability, Undiscounted Excess Amount Lease, Liability, Undiscounted Excess Amount Less: billings to date Billings To Date Represents the billings to date on uncompleted contracts accounted for under the percentage-of-completion method. Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Accounts payable Increase (Decrease) in Accounts Payable Operating cash flows from operating leases Operating Lease, Payments Swingline Loan Swingline Loan [Member] Swingline Loan Contract retainages, net Construction Contractor, Receivable, Retainage Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property and equipment, net of accumulated depreciation of $387,375 and $380,465, respectively Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Payment of principal obligations under finance leases Finance Lease, Principal Payments Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Insurance coverage deductible Loss Contingency Insurance Policy Deductible amount of Deductible Insurance Policy for Loss Contingency Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Weighted average number of common shares and potential common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Assets Contract costs Cost of Goods and Services Sold Debt outstanding under facility Long-Term Line of Credit Contingent earn-out consideration payment Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Shares granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Transmission Market Type Transmission [Member] Refundable income taxes Income Taxes Receivable, Current Payment of principal obligations under equipment notes Repayments of Notes Payable Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net Period [Domain] Net Period [Domain] Other liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Commitments and contingencies Commitments and Contingencies Termination Date Trading Arrangement Termination Date 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Notes payable to banks Notes Payable to Banks [Member] 2025 Long-Term Debt, Maturity, Year One Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Schedule of Operating And Finance Leases, Disclosure [Table] Schedule of Operating And Finance Leases, Disclosure [Table] n/a Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Net asset position for contracts in process Net Costs And Estimated Earnings In Excess Of Billings Represents the net costs and estimated earnings in excess of billings on uncompleted contracts accounted for under the percentage-of-completion method. Net income (loss) Net income (loss) Increase (decrease) in net income Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Remaining lease term Lessee Operating and Finance Leases Remaining Contract Term Lessee operating and finance leases remaining contract term. Interest and penalties of unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Other Commitments [Table] Other Commitments [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number Revenue Recognition Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Product concentration risk Product Concentration Risk [Member] Entity Address, Address Line Two Entity Address, Address Line Two Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Contract liabilities, Change Increase (Decrease) in Payables to Customers Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Leverage coverage ratio Leverage Coverage Ratio The Company has the option to expand the debt coverage ratio in the event of an acquisition. Name Forgone Recovery, Individual Name Remainder of 2024 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Document Period End Date Document Period End Date Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] 2025 Lease, Liability, To Be Paid, One Year Lease, Liability, To Be Paid, One Year Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Current portion of finance lease obligations Finance lease obligations Current portion of finance lease obligations Finance Lease, Liability, Current Other non-cash items Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Base Rate Base Rate [Member] Minimum lease payments required Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Deferred revenue, Change Increase (Decrease) in Deferred Revenue Insider Trading Arrangements [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Less: current portion of finance and operating lease obligations Lease, Liability, Current Lease, Liability, Current 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Accrued self-insurance Increase (Decrease) in Self Insurance Reserve Interest coverage ratio Debt Instrument Covenant Interest Coverage Ratio Represent the minimum interest coverage ratio under the credit agreement. 2029 Lease, Liability, To Be Paid, Year Five Lease, Liability, To Be Paid, Year Five Revenues recognized during period Contract with Customer, Liability, Revenue Recognized Adjustment to Compensation: Adjustment to Compensation [Axis] Document Transition Report Document Transition Report Thereafter Lease, Liability, To Be Paid, After Year Five Lease, Liability, To Be Paid, After Year Five Document Quarterly Report Document Quarterly Report Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Costs and estimated earnings on uncompleted contracts Aggregate Costs Incurred On Uncompleted Contracts And Estimated Earnings Represents the aggregate of costs incurred on uncompleted contracts and estimated earnings. Retained Earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Related Party [Axis] Related and Nonrelated Parties [Axis] Basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Option to increase borrowing capacity Line Of Credit Facility Option To Increase Maximum Borrowing Capacity Represents the option to increase maximum borrowings on the credit facility. Current portion of accrued self-insurance Self Insurance Reserve, Current Total shareholders’ equity Balance, beginning of period Balance, end of period Equity, Including Portion Attributable to Noncontrolling Interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Revenue benchmark Revenue Benchmark [Member] Entity Filer Category Entity Filer Category Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Accrued loss provision, Change Increase Decrease In Accrued loss provision The increase (decrease) during the reporting period of the amount of accrued loss provision. Letter of credit Letter of Credit [Member] Company Selected Measure Name Company Selected Measure Name Option to terminate leases, period Lessee Operating and Finance Leases Option to Terminate Period Lessee, operating and finance leases, option to terminate, period.