Deferred income taxes Deferred Income Taxes and Tax Credits Long-term finance and operating lease obligations Lease, Liability, Noncurrent Lease, Liability, Noncurrent Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Variable Rate [Domain] Variable Rate [Domain] 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. Non-employee Directors Share-Based Payment Arrangement, Nonemployee [Member] Pay vs Performance Disclosure [Line Items] 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. Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Changes in operating assets and liabilities, net of acquisition: Increase (Decrease) in Operating Capital [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Equity Award [Domain] Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Remaining performance obligation, term Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Debt Debt Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Performance Guarantee Performance Guarantee [Member] Revolving loans Revolving Credit Facility [Member] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Employees Employees [Member] Deferred income tax liabilities Deferred Income Tax Liabilities, Net MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Performance Awards Performance Shares [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Accounts payable Accounts Payable, Current Restatement Determination Date: Restatement Determination Date [Axis] Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 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. Commitments and contingencies Commitments and Contingencies Operating Lease Obligations Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] 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] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Five Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Income Taxes Income Tax Disclosure [Text Block] Contract liabilities Contract liabilities, Change Increase (Decrease) in Contract with Customer, Liability 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. Current liabilities: Current Liabilities, Current [Abstract] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Business Acquisition [Line Items] Business Acquisition [Line Items] Diluted (in dollars per share) Increase (decrease) in diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Accounts receivable, net of allowances of $2,106 and $2,073, respectively Accounts Receivable, after Allowance for Credit Loss, Current Number of equity compensation plans (plan) Number Of Equity Stock Based Compensation Plans Represents the number of equity stock based compensation plans. Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Shares outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Contract retainages, net Construction Contractor, Receivable, Retainage Trading Symbol Trading Symbol Letters of credit outstanding Letters of Credit Outstanding, Amount Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Increase (decrease) in net income Net income Net Income (Loss) Total current liabilities Liabilities, Current Adjusted Term Secured Overnight Financing Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] 2025 Finance Lease, Liability, to be Paid, Year Two Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name Remainder of 2023 Lease, Liability, To Be Paid, Remainder of Fiscal Year Lease, Liability, To Be Paid, Remainder of Fiscal Year Lease Obligations Lessee, Operating Leases [Text Block] Property and equipment, net of accumulated depreciation of $363,112 and $351,753, respectively Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Shareholders’ equity: Equity, Attributable to Parent [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Shares exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period 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] Contract costs Cost of Goods and Services Sold Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Executive Category: Executive Category [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Other Commitments [Table] Other Commitments [Table] Shares exercised, weighted average exercise price (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Name Measure Name Name Forgone Recovery, Individual Name Bonds outstanding Guarantor Obligations, Maximum Exposure, Undiscounted Goodwill Goodwill Equity Components [Axis] Equity Components [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] 2025 Long-Term Debt, Maturity, Year Two Underlying Securities Award Underlying Securities Amount Entity Small Business Entity Small Business Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Local Phone Number Local Phone Number Accounts receivable, net Increase (Decrease) in Accounts Receivable Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Letter of credit Letter of Credit [Member] 2028 Finance Lease, Liability, to be Paid, Year Five Organization Consolidation and Presentation of Financial Statements [Table] Organization Consolidation and Presentation of Financial Statements [Table] Subsidiaries Subsidiaries [Member] Remainder of 2023 Long-Term Debt, Maturity, Remainder of Fiscal Year Increase (decrease) in consolidated gross margin Cost Estimate Revision Gross Margin Increase Decrease Percentage Percentage of increase (decrease) cost estimate revision gross margin. Operating lease obligations, net of current maturities Operating lease obligations Operating Lease, Liability, Noncurrent Receivable for insurance claims in excess of deductibles Increase (Decrease) in Insurance Settlements Receivable Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Term (years) Debt instrument term Debt Instrument, Term Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Depreciation and amortization of property and equipment Depreciation Schedule of total debt Schedule of Long-Term Debt Instruments [Table Text Block] Schedule of future minimum operating lease payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Weighted average dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment 2026 Lease, Liability, To Be Paid, Year Three Lease, Liability, To Be Paid, Year Three Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Equipment Note 10 Equipment Note Ten [Member] Equipment Note Ten Schedule of shared excluded from calculation of dilute securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Grantee Status [Axis] Grantee Status [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Schedule of lease costs Lease, Cost [Table Text Block] Contract assets, net of allowances of $601 and $499, respectively Contract assets, net Contract assets, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Electrical construction Market Type Electrical Construction [Member] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Antidilutive securities excluded from computation of earnings (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Award Type [Axis] Award Type [Axis] Shares granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Plan Name [Domain] Plan Name [Domain] Document Quarterly Report Document Quarterly Report Refundable income taxes Income Taxes Receivable, Current Certain Performance Targets Certain Performance Targets [Member] Certain Performance Targets Interest expense Interest Expense Right-of-use asset obtained in exchange for new operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Trading Arrangement: Trading Arrangement [Axis] 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. Financing component Lessee, Operating Lease, Liability, Undiscounted Excess Amount Use of Estimates Use of Estimates, Policy [Policy Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Lease Obligations Lessee, Finance Leases [Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Total Lease Obligations Total Lease Obligations [Abstract] Total Lease Obligations Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Contract Assets and Liabilities Long-Term Contracts or Programs Disclosure [Text Block] Current portion of operating lease obligations Operating lease obligations Less: current portion of finance and operating lease obligations Operating Lease, Liability, Current 2026 Long-Term Debt, Maturity, Year Three Interest on lease liabilities Finance Lease, Interest Expense 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, 2023 and December 31, 2022 Preferred Stock, Value, Outstanding Entity Shell Company Entity Shell Company 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Debt refinancing costs Payments of Debt Restructuring Costs Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date Shares repurchased, weighted average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Other liabilities Increase (Decrease) in Other Operating Liabilities Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Beginning of period End of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two 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. Interest income Investment Income, Interest Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Variable lease costs Variable Lease, Cost Operating lease cost Operating Lease, Cost Common stock, shares issued (in shares) Common Stock, Shares, Issued Shares vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Gross profit Gross Profit Letter of credit facility commitment percentage Line of Credit Facility, Commitment Fee Percentage Contract liabilities Contract liabilities Contract liabilities Contract with Customer, Liability, Current Number of equipment notes (equipment note) Debt Instrument Number Of Debt Instruments The number of debt instruments. Security Exchange Name Security Exchange Name Total debt Long-Term Debt Selling, general and administrative expenses Selling, General and Administrative Expense 2027 Long-Term Debt, Maturity, Year Four Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Stock Options Employee Stock Option [Member] Operating And Finance Leases [Line Items] Operating And Finance Leases [Line Items] n/a Other financing activities Proceeds from (Payments for) Other Financing Activities Maximum Maximum [Member] Document Type Document Type Notes payable to banks Notes Payable to Banks [Member] Weighted average interest rate Line of Credit Facility, Interest Rate During Period Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract] Tabular List, Table Tabular List [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two 2027 Lease, Liability, To Be Paid, Year Four Lease, Liability, To Be Paid, Year Four 2026 Finance Lease, Liability, to be Paid, Year Three Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Purchase orders outstanding Purchase Commitment, Remaining Minimum Amount Committed 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. Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Other non-cash items Other Noncash Income (Expense) 2024 Finance Lease, Liability, to be Paid, Year One Business Acquisition [Axis] Business Acquisition [Axis] Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Other current liabilities Other Liabilities, Current Variable Rate [Axis] Variable Rate [Axis] Income Statement [Abstract] Income Statement [Abstract] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Contract assets, net Changes in contract assets, net, Change Contract assets, net, Change Increase (Decrease) in Contract with Customer, Asset Title of 12(b) Security Title of 12(b) Security Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Organization Consolidation and Presentation of Financial Statements [Line Items] Organization Consolidation and Presentation of Financial Statements [Line Items] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Related Party [Domain] Related Party, Type [Domain] Net Period [Axis] Net Period [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Operating Segments Operating Segments [Member] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Stock issued under compensation plans, net Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Prepaid expenses and other current assets Other Assets, Current Non-performance letters of credit Nonperformance Letters Of Credit [Member] Contract Performance Obligations Contract Performance Obligations [Member] Contract Performance Obligations Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Master loan agreement Master Loan Agreement [Member] Master Loan Agreement [Member]. Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Time Vested Stock Awards Time Vested Stock Awards [Member] Time Vested Stock Awards Member Entity Tax Identification Number Entity Tax Identification Number Total lease cost Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Total Shareholder Return Amount Total Shareholder Return Amount Repurchase of common stock Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Segments [Domain] Segments [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Measure: Measure [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Other Commitments [Line Items] Other Commitments [Line Items] 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] Total minimum lease payments Finance Lease, Liability, to be Paid Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Total non-current obligations Lease Obligation Noncurrent Represent the lease obligation noncurrent. Operating cash flows from operating leases Operating Lease, Payments Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding 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. Total right-of-use lease assets Operating and Finance Lease Right of Use Asset Represent the operating and finance lease right-of-use asset. Current portion of accrued self-insurance Self Insurance Reserve, Current PEO PEO [Member] Balance, beginning of period (in shares) Balance, end of period (in shares) Shares, Outstanding Contingencies Excluding Wildfire and Health Insurance Contingencies Excluding Wildfire And Health Insurance [Member] Contingencies Excluding Wildfire and Health Insurance [Member] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Finance Lease Obligations Finance Lease, Liability [Abstract] Net cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities Debt Instrument [Axis] Debt Instrument [Axis] Shares repurchased related to tax withholding for stock-based compensation Stock Repurchased and Retired During Period, Value Unit price Unit Price Contract [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Effective tax rate Effective Income Tax Rate Reconciliation, Percent Net present value of minimum lease payments Operating Lease, Liability Remainder of 2023 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Credit Facility [Axis] Credit Facility [Axis] Schedule of remaining principal payments for long term obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Total liabilities Liabilities 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. Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] 2017 Long-Term Incentive Plan 2017 Long-Term Incentive Plan [Member] All Executive Categories All Executive Categories [Member] Total minimum lease payments Lease, Liability, To Be Paid Lease, Liability, To Be Paid Non-current Liabilities, Noncurrent [Abstract] Title of Individual [Axis] Title of Individual [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Plan Name [Axis] Plan Name [Axis] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Number of business segments (segment) Number of business segments (segment) Number of Reportable Segments Income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Credit agreement Credit Agreement [Member] Credit Agreement [Member]. Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,709,534 and 16,563,767 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively Common Stock, Value, Issued Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Total current assets Assets, Current Preferred Stock Preferred Stock [Member] Investment in joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 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. Payment of principal obligations under finance leases Finance Lease, Principal Payments Schedule of future minimum finance lease payments Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Accrued self-insurance Increase (Decrease) in Self Insurance Reserve Contingent earn-out consideration Business Combination, Contingent Consideration, Liability Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] All Individuals All Individuals [Member] Other information: Supplemental Cash Flow Information [Abstract] Cash paid for amounts included in the measurement of lease liabilities Cash Flow, Operating Activities, Lessee [Abstract] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other income, net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Repurchase program authorized amount Stock Repurchase Program, Authorized Amount Shares repurchased under repurchase program (in shares) Stock Repurchased During Period, Shares T&D Transmission And Distribution [Member] Unrecognized tax benefits Unrecognized Tax Benefits PEO Name PEO Name Concentration risk, Percent Concentration Risk, Percentage 2025 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. Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Base Rate Base Rate [Member] 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 Share expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding 2027 Finance Lease, Liability, to be Paid, Year Four Net cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Corporate, Non-Segment Corporate, Non-Segment [Member] Product concentration risk Product Concentration Risk [Member] Lease amortization period Lessee Operating Lease Amortization Period It represents Lessee Operating Lease Amortization Period. Stated Interest Rate (per annum) Debt Instrument, Interest Rate, Stated Percentage Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Consolidation Items [Axis] Consolidation Items [Axis] Deferred revenue, Change Increase (Decrease) in Deferred Revenue Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenues recognized during period Contract with Customer, Liability, Revenue Recognized Concentration Risk Type [Axis] Concentration Risk Type [Axis] Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Unbilled revenue, net Unbilled revenue Unbilled Contracts Receivable Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] C&I Commercial And Industrial [Member] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Powerline Plus Companies Powerline Plus Companies [Member] Powerline Plus Companies Entity Emerging Growth Company Entity Emerging Growth Company Deferred debt issuance costs Debt Issuance Costs, Line of Credit Arrangements, Net Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] 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 Intangible assets, net of accumulated amortization of $28,061 and $25,439, respectively Intangible Assets, Net (Excluding Goodwill) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Employees Share-Based Payment Arrangement, Employee [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Antidilutive Securities [Axis] Antidilutive Securities [Axis] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Title Trading Arrangement, Individual Title Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Schedule of Contractors [Table] Schedule of Contractors [Table] n/a Common Stock Common Stock [Member] Individual: Individual [Axis] 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. City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Earnings Per Share Earnings Per Share [Text Block] Health Insurance Health Insurance [Member] Health Insurance [Member] Document Fiscal Year Focus Document Fiscal Year Focus Total shareholders’ equity Balance, beginning of period Balance, end of period Equity, Including Portion Attributable to Noncontrolling Interest Net contract assets Net Contract Assets (Liabilities) The amount of net contract assets (liabilities) as at balance sheet period. Interest and penalties of unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Minimum Minimum [Member] Weighted average number of common shares and potential common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Organization, Business and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Exercise Price Award Exercise Price Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Contingent earn-out consideration payment Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Estimated remaining costs for bonded projects Guarantor Obligations Expected Costs Its represents the guarantor obligations expected costs. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] ASSETS Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Foreign currency gains (losses) Gain (Loss), Foreign Currency Transaction, before Tax Current portion of receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Current Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Payments related to tax withholding for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities Liabilities [Abstract] T&E Te Contract [Member] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net cash flows provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Performance letters of credit Performance Letters Of Credit [Member] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Noncurrent Retained Earnings Retained Earnings [Member] Current portion of long-term debt Less: current portion of long-term debt Less: current portion of equipment notes Long-Term Debt, Current Maturities Contractors [Line Items] Contractors [Line Items] n/a Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Total liabilities and shareholders’ equity Liabilities and Equity Other income (expense): Nonoperating Income (Expense) [Abstract] Other assets Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Change Net Period Change [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Remainder of 2023 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 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's internal financial reports Schedule of Segment Reporting Information, by Segment [Table Text Block] Interim Consolidated Financial Information Consolidation, Policy [Policy Text Block] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Remaining availability to repurchase shares Stock Repurchase Program, Remaining Authorized Repurchase Amount Termination Date Trading Arrangement Termination Date Accounts payable Increase (Decrease) in Accounts Payable Common stock, shares authorized (in shares) Common Stock, Shares Authorized Repayments under revolving lines of credit Repayments of Lines of Credit Contract assets, allowance Allowance for doubtful accounts associated with contract assets Contract with Customer, Asset, Allowance for Credit Loss, Current 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] Liability Class [Axis] Liability Class [Axis] All Trading Arrangements All Trading Arrangements [Member] 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. Other equipment note Other Equipment Note [Member] Other Equipment Note Property and equipment, accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Award Timing Disclosures [Line Items] Relationship to Entity [Domain] Title of Individual [Domain] Compensation Amount Outstanding Recovery Compensation Amount Assets Servicing Asset [Abstract] Net present value of minimum lease payments Lease, Liability Lease, Liability Letters Of Credit, Discretional Letters Of Credit, Discretional [Member] Letters Of Credit, Discretional 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] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Contracts Accounted for under Percentage of Completion Contracts Accounted for under Percentage of Completion [Member] Net present value of minimum lease payments Finance Lease, Liability Joint Ventures and Noncontrolling Interests Equity Method Investments [Policy Text Block] Insider Trading Arrangements [Line Items] 2024 Long-Term Debt, Maturity, Year One Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Related Party [Axis] Related Party, Type [Axis] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Stock issued under compensation plans, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Total current obligations Lease Obligation Current Represents the lease obligation, current Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Other assets Increase (Decrease) in Other Operating Assets Adjustment to Compensation, Amount Adjustment to Compensation Amount Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Change in contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 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. Document Period End Date Document Period End Date Borrowings under revolving lines of credit Proceeds from Lines of Credit Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent 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 Finance lease obligations, net of current maturities Finance Lease, Liability, Noncurrent Entity Central Index Key Entity Central Index Key Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gain on sale of property and equipment Gain on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Income tax expense Income Tax Expense (Benefit) Swingline Loan Swingline Loan [Member] Swingline Loan Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Fair Value Measurements Fair Value Disclosures [Text Block] Revenue benchmark Revenue Benchmark [Member] Name Trading Arrangement, Individual Name Insurance coverage deductible Loss Contingency Insurance Policy Deductible amount of Deductible Insurance Policy for Loss Contingency Schedule of revenue by contract and market type Disaggregation of Revenue [Table Text Block] Wildfire Wildfire [Member] Wildfire [Member] Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Contract revenues Contract revenues: Revenue from Contract with Customer, Excluding Assessed Tax Transmission Market Type Transmission [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Net Period [Domain] Net Period [Domain] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Payment of principal obligations under equipment notes Repayments of Notes Payable Cash paid for acquired business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Credit Facility [Domain] Credit Facility [Domain] 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 Schedule of Operating And Finance Leases, Disclosure [Table] Schedule of Operating And Finance Leases, Disclosure [Table] n/a Interest rate margin Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Long-term debt Long-term principal obligations Long-Term Debt, Excluding Current Maturities Weighted-average remaining lease term - finance leases Finance Lease, Weighted Average Remaining Lease Term Diluted (in shares) Weighted average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Grantee Status [Domain] Grantee Status [Domain] 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. Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Remaining lease term Lessee Operating and Finance Leases Remaining Contract Term Lessee operating and finance leases remaining contract term. Schedule of contract assets and liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Right-of-use asset obtained in exchange for new finance lease obligations Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Financing component Finance Lease, Liability, Undiscounted Excess Amount Revenue Recognition Revenue from Contract with Customer [Text Block] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-In Capital Additional Paid-in Capital [Member] Schedule of net asset position for contracts in process Long-Term Contract or Program Disclosure [Table Text Block] Lease cost: Lease, Cost [Abstract] Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Thereafter Finance Lease, Liability, to be Paid, after Year Five Cover [Abstract] Cover [Abstract] Leverage coverage ratio Leverage Coverage Ratio The Company has the option to expand the debt coverage ratio in the event of an acquisition. Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 2028 Long-Term Debt, Maturity, Year Five Accrued self-insurance Self Insurance Reserve, Noncurrent 2024 Lease, Liability, To Be Paid, One Year Lease, Liability, To Be Paid, One Year Other liabilities Other Liabilities, Noncurrent 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 Non-NEOs Non-NEOs [Member] Minimum lease payments required Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Accrued loss provision Provision for Loss on Contracts Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Segment Information Segment Reporting Disclosure [Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Less: current portion of finance and operating lease obligations Lease, Liability, Current Lease, Liability, Current Secured debt Secured Debt [Member] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Current portion of finance lease obligations Finance lease obligations Current portion of finance lease obligations Finance Lease, Liability, Current Adjustment to Compensation: Adjustment to Compensation [Axis] Interest coverage ratio Debt Instrument Covenant Interest Coverage Ratio Represent the minimum interest coverage ratio under the credit agreement. 2028 Lease, Liability, To Be Paid, Year Five Lease, Liability, To Be Paid, Year Five 2007 Long-Term Incentive Plan 2007 Long-Term Incentive Plan [Member] 2007 Long-Term Incentive Plan Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Thereafter Lease, Liability, To Be Paid, After Year Five Lease, Liability, To Be Paid, After Year Five Basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Concentration Risk Type [Domain] Concentration Risk Type [Domain] Fixed price Fixed-Price Contract [Member] Unamortized deferred debt issuance costs Unamortized Debt Issuance Expense Income from operations Increase (decrease) in operating income Income from operations: Operating Income (Loss) Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] 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. 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. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Commitment fee on unused capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Statement [Line Items] Statement [Line Items] Contract liabilities, Change Increase (Decrease) in Payables to Customers 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] Debt outstanding under facility Long-Term Line of Credit Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Accrued loss provision, Change Increase Decrease In Accrued loss provision The increase (decrease) during the reporting period of the amount of accrued loss provision. Option to terminate leases, period Lessee Operating and Finance Leases Option to Terminate Period Lessee, operating and finance leases, option to terminate, period.