Other information: Supplemental Cash Flow Information [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. Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Letter of credit Letter of Credit [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Shares vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Contract retainages, net, Change Increase (Decrease) In Contract Receivable Retainage The increase (decrease) during the reporting period of the amount of contract receivable retainage. Increase (decrease) in net income Net income Net Income (Loss) Attributable to Parent Entity Emerging Growth Company Entity Emerging Growth Company Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Range [Domain] Statistical Measurement [Domain] Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Entity Address, Address Line One Entity Address, Address Line One Accrued self insurance Increase (Decrease) in Self Insurance Reserve Schedule of remaining principal payments for long term obligations Schedule of Maturities of Long-term Debt [Table Text Block] Contract assets, net Changes in contract assets, net, Change Contract assets, net, Change Increase (Decrease) in Contract with Customer, Asset Non-employee Directors Share-based Payment Arrangement, Nonemployee [Member] Employees Employees [Member] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Schedule of contract assets and liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Additional paid-in capital Additional Paid in Capital, Common Stock Entity Filer Category Entity Filer Category Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Insurance program obligations Insurance Program Obligations [Member] Insurance Program Obligations Other assets Other Assets, Noncurrent 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. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Segments [Axis] Segments [Axis] Contract liabilities, Change Increase (Decrease) in Payables to Customers Net increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 2023 Long-Term Debt, Maturity, Year Two Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Remainder of 2021 Long-Term Debt, Maturity, Remainder of Fiscal Year 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. Document Fiscal Year Focus Document Fiscal Year Focus Subsequent Event Type [Domain] Subsequent Event Type [Domain] Revolving loans and letters of credit Revolving Loans And Letters Of Credit [Member] Revolving Loans And Letters Of Credit Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] 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, 2021 and December 31, 2020 Preferred Stock, Value, Outstanding Variable lease costs Variable Lease, Cost Antidilutive securities excluded from computation of earnings (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Revenues recognized during period Contract with Customer, Liability, Revenue Recognized Liability Class [Axis] Liability Class [Axis] Subsequent Events [Abstract] Number of equity compensation plans (plan) Number Of Equity Stock Based Compensation Plans Represents the number of equity stock based compensation plans. 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 Letter of credit facility commitment percentage Line of Credit Facility, Commitment Fee Percentage Relationship to Entity [Domain] Title of Individual [Domain] Equity Award [Domain] Award Type [Domain] Credit Facility [Domain] Credit Facility [Domain] ASSETS Assets [Abstract] 2024 Long-Term Debt, Maturity, Year Three Shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Concentration risk, Percent Concentration Risk, Percentage Contract retainages, net Construction Contractor, Receivable, Retainage Entity Address, City or Town Entity Address, City or Town Retained Earnings Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Non-current Liabilities, Noncurrent [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Related Party [Axis] Related Party [Axis] Shares repurchased Stock Repurchased and Retired During Period, Value Secured Debt Secured Debt [Member] Accounts receivable, net Increase (Decrease) in Accounts Receivable Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Right-of-use asset obtained in exchange for new operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Payment of principal obligations under finance leases Finance Lease, Principal Payments Entity Interactive Data Current Entity Interactive Data Current Deferred revenue, Change Increase (Decrease) in Deferred Revenue Organization Consolidation and Presentation of Financial Statements [Table] Organization Consolidation and Presentation of Financial Statements [Table] Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Revenue Recognition Revenue from Contract with Customer [Text Block] Increase (decrease) in consolidated gross margin Cost Estimate Revision Gross Margin Increase Decrease Percentage Percentage of increase (decrease) cost estimate revision gross margin. Document Type Document Type 2022 Long-Term Debt, Maturity, Year One Schedule of revenue by contract and market type Disaggregation of Revenue [Table Text Block] 2026 Long-Term Debt, Maturity, Year Five Entity Current Reporting Status Entity Current Reporting Status Cumulative Effect Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Operating cash flows from operating leases Operating Lease, Payments Other non-cash items Other Noncash Income (Expense) 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 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Plan Name [Axis] Plan Name [Axis] Electrical construction Market Type Electrical Construction [Member] Total future principal payments Long-term Debt Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Document Transition Report Document Transition Report Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Operating Lease Obligations Lessee, Operating Lease, Liability, Payment, Due [Abstract] Base Rate Base Rate [Member] Total liabilities and stockholders’ equity Liabilities and Equity 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. Contract liabilities Contract liabilities Contract liabilities Contract with Customer, Liability, Current 2026 Lessee, Operating Lease, Liability, to be Paid, Year Five Receivable for insurance claims in excess of deductibles Increase (Decrease) in Insurance Settlements Receivable 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 Accounts payable Increase (Decrease) in Accounts Payable Earnings Per Share Earnings Per Share [Text Block] Thereafter Long-Term Debt, Maturity, after Year Five Minimum Minimum [Member] Refundable income taxes Income Taxes Receivable, Current 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. Gross profit Gross Profit Debt outstanding under facility Long-term Line of Credit 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Selling, general and administrative expenses Selling, General and Administrative Expense Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Unrecognized tax benefits Unrecognized Tax Benefits Number of equipment notes (equipment note) Debt Instrument Number Of Debt Instruments The number of debt instruments. Subsidiaries Subsidiaries [Member] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Lease Obligations Lessee, Finance Leases [Text Block] Trading Symbol Trading Symbol Operating And Finance Leases [Line Items] Operating And Finance Leases [Line Items] n/a Current liabilities: Current Liabilities, Current [Abstract] 2025 Long-Term Debt, Maturity, Year Four Debt Debt Disclosure [Text Block] Balance, beginning of period (in shares) Balance, end of period (in shares) Shares, Outstanding Stock-Based Compensation Share-based Payment Arrangement [Text Block] Property and equipment, accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Number of business segments (segment) Number of business segments (segment) Number of Reportable Segments 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. Letters of credit outstanding Letters of Credit Outstanding, Amount Net present value of minimum lease payments Operating Lease, Liability Foreign currency gains (losses) Foreign Currency Transaction Gain (Loss), before Tax Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,867,470 and 16,734,239 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Performance Awards Performance Shares [Member] Commitments and contingencies Commitments and Contingencies Long-Term Incentive Plan Longterm Incentive Plan [Member] Subsequent Event [Table] Subsequent Event [Table] Lease Obligations Lessee, Operating Leases [Text Block] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Purchase orders outstanding, term Purchase Commitment Remaining Term The terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations. Remainder of 2021 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Organization Consolidation and Presentation of Financial Statements [Line Items] Organization Consolidation and Presentation of Financial Statements [Line Items] Other Commitments [Table] Other Commitments [Table] Product concentration risk Product Concentration Risk [Member] Net Period [Axis] Net Period [Axis] Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Document Period End Date Document Period End Date Non-performance letters of credit Nonperformance Letters Of Credit [Member] Contract performance obligations Contract Performance Obligations [Member] Entity Registrant Name Entity Registrant Name 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 Financing component Lessee, Operating Lease, Liability, Undiscounted Excess Amount Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract] Contract revenues Contract revenues: Revenue from Contract with Customer, Excluding Assessed Tax Performance Guarantee Performance Guarantee [Member] Stock Options Share-based Payment Arrangement, Option [Member] Consolidation Items [Domain] Consolidation Items [Domain] Common Stock Common Stock [Member] Interest income Investment Income, Interest Variable Rate [Axis] Variable Rate [Axis] Segment Information Segment Reporting Disclosure [Text Block] Weighted-average remaining lease term - finance leases Finance Lease, Weighted Average Remaining Lease Term Income from operations Increase (decrease) in operating income Income from operations: Operating Income (Loss) Current portion of operating lease obligations Operating lease obligations Less: current portion of finance and operating lease obligations Operating Lease, Liability, Current Organization, Business and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Variable Rate [Domain] Variable Rate [Domain] Total non-current obligations Lease Obligation Noncurrent Represent the lease obligation noncurrent. Additional Paid-In Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Equipment Note 7 Equipment Note Seven [Member] Equipment note seven member. Depreciation and amortization of property and equipment Depreciation Distribution Market Type Distribution [Member] Receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Noncurrent 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. Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Joint Ventures and Noncontrolling Interests Equity Method Investments [Policy Text Block] Contingencies Excluding Wildfire and Health Insurance Contingencies Excluding Wildfire And Health Insurance [Member] Contingencies Excluding Wildfire and Health Insurance [Member] Other income (expense), net Other Nonoperating Income (Expense) Other liabilities Increase (Decrease) in Other Operating Liabilities Shares repurchased (in shares) Stock Repurchased and Retired During Period, Shares Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Other current liabilities Other Liabilities, Current Distributions to partners Partners' Capital Account, Distributions Maximum Maximum [Member] Huen Electric Inc Huen Electric Inc [Member] Huen Electric Inc Member Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Unit price Unit Price Contract [Member] Total liabilities Liabilities Legal Entity [Axis] Legal Entity [Axis] Award Type [Axis] Award Type [Axis] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] 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. Schedule of future minimum operating lease payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Total stockholders’ equity attributable to MYR Group Inc. Stockholders' Equity Attributable to Parent Common stock, shares issued (in shares) Common Stock, Shares, Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Net repayments under revolving lines of credit Proceeds from (Repayments of) Lines of Credit Credit Agreement Credit Agreement [Member] Credit Agreement [Member]. Repurchase of common shares Payments for Repurchase of Common Stock Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Operating lease obligations, net of current maturities Operating lease obligations Operating Lease, Liability, Noncurrent Outstanding finance lease obligations Finance Lease, Liability, Payment, Due Interest expense Interest Expense Prepayment of equipment note Proceeds from (Repayments of) Notes Payable 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. Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] City Area Code City Area Code Contract assets, allowance Allowance for doubtful accounts associated with contract assets Contract with Customer, Asset, Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Operating Segments Operating Segments [Member] Commitment fee on unused capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Current portion of accrued self-insurance Self Insurance Reserve, Current T&D Transmission And Distribution [Member] Income Statement [Abstract] Income Statement [Abstract] Amendment Flag Amendment Flag 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. Proceeds from exercise of stock options Proceeds from Stock Options Exercised Income tax expense Income Tax Expense (Benefit) Total stockholders’ equity Balance, beginning of period Adjustment to adopt ASC 326 Balance, end of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Accounts receivable, net of allowances of $1,980 and $1,696, respectively Accounts Receivable, after Allowance for Credit Loss, Current Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total current assets Assets, Current Concentration Risk Type [Domain] Concentration Risk Type [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Minimum lease payments required Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Schedule of segment's internal financial reports Schedule of Segment Reporting Information, by Segment [Table Text Block] Lease amortization period Lessee Operating Lease Amortization Period It represents Lessee Operating Lease Amortization Period. Entity File Number Entity File Number Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Contracts Accounted for under Percentage of Completion Contracts Accounted for under Percentage of Completion [Member] Fair Value Measurements Fair Value Measurement, Policy [Policy 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 Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Small Business Entity Small Business Grantee Status [Axis] Grantee Status [Axis] Equipment Note 9 Equipment Note Nine [Member] Represents the information pertaining to equipment note 9. Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Revenue benchmark Revenue Benchmark [Member] Equity Component [Domain] Equity Component [Domain] Stock issued under compensation plans, net (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Notes payable to banks Notes Payable to Banks [Member] C&I Commercial And Industrial [Member] Statement [Line Items] Statement [Line Items] Property and equipment, net of accumulated depreciation of $307,911 and $294,366, respectively Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Contract liabilities Contract liabilities, Change Increase (Decrease) in Contract with Customer, Liability Grantee Status [Domain] Grantee Status [Domain] 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 Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Stock issued under compensation plans, net Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities Liabilities [Abstract] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Debt Disclosure [Abstract] Debt Disclosure [Abstract] Entity Address, State or Province Entity Address, State or Province Current portion of finance lease obligations Finance lease obligations Finance Lease, Liability, Current Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Accrued self-insurance Self Insurance Reserve, Noncurrent Corporate, Non-Segment Corporate, Non-Segment [Member] Schedule of Contractors [Table] Schedule of Contractors [Table] n/a Segment Reporting [Abstract] Segment Reporting [Abstract] Entity [Domain] Entity [Domain] 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. Interest on lease liabilities Finance Lease, Interest Expense Use of Estimates Use of Estimates, Policy [Policy Text Block] 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] Health Insurance Health Insurance [Member] Health Insurance [Member] Entity Shell Company Entity Shell Company Local Phone Number Local Phone Number Net contract assets (liabilities) Net Contract Assets (Liabilities) The amount of net contract assets (liabilities) as at balance sheet period. Total assets Assets Deferred income taxes Deferred Income Taxes and Tax Credits Plan Name [Domain] Plan Name [Domain] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Numerator: Net Income (Loss) Attributable to Parent [Abstract] Title of Individual [Axis] Title of Individual [Axis] Payment of principal obligations under equipment notes Repayments of Notes Payable Estimated remaining costs for bonded projects Guarantor Obligations Expected Costs Its represents the guarantor obligations expected costs. Effect of exchange rate changes on cash Effect of Exchange Rate on Cash Noncontrolling Interest Noncontrolling Interest [Member] Stated Interest Rate (per annum) Debt Instrument, Interest Rate, Stated Percentage Capital contributions to joint venture Partners' Capital Account, Contributions Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] T&E Te Contract [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Performance letters of credit Performance Letters Of Credit [Member] Revolving loans Revolving Credit Facility [Member] Remaining performance obligation, term Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Net cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities Contractors [Line Items] Contractors [Line Items] n/a Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Schedule of lease costs Lease, Cost [Table Text Block] Entity Tax Identification Number Entity Tax Identification Number Assets Servicing Asset [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change Net Period Change [Member] Contract Assets and Liabilities Long-term Contracts or Programs Disclosure [Text Block] Basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Increase (decrease) in diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Weighted average dilutive securities (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Investment in joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Accounting Standards Update [Extensible Enumeration] Accounting Standards Update [Extensible Enumeration] Subsequent Event Subsequent Events [Text Block] Lease cost: Lease, Cost [Abstract] Unbilled revenue, net Unbilled revenue Unbilled Contracts Receivable Intangible assets, net of accumulated amortization of $15,623 and $14,467, respectively Intangible Assets, Net (Excluding Goodwill) Fixed price Fixed-price Contract [Member] Net cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities Weighted average number of common shares and potential common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Interest and penalties of unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Fair Value Measurements Fair Value Disclosures [Text Block] Accounts payable Accounts Payable, Current Concentration Risk Type [Axis] Concentration Risk Type [Axis] MYR Group Inc. Stockholders' Equity Parent [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding 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. Contract costs Cost of Goods and Services Sold Equipment Note 6 Equipment Note Six [Member] Equipment note six member. Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] 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] Total lease cost Lease, Cost Term (years) Debt instrument term Debt Instrument, Term Other liabilities Other Liabilities, Noncurrent Employees Share-based Payment Arrangement, Employee [Member] Schedule of total debt Schedule of Long-term Debt Instruments [Table Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Total current obligations Lease Obligation Current Represents the lease obligation, current Document Quarterly Report Document Quarterly Report Other assets Increase (Decrease) in Other Operating Assets Less: billings to date Billings To Date Represents the billings to date on uncompleted contracts accounted for under the percentage-of-completion method. Other Commitments [Line Items] Other Commitments [Line Items] Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Long-term debt Long-term principal obligations Long-term Debt, Excluding Current Maturities Stock issued - other Stock Issued During Period, Value, Other Accrued loss provision Provision for Loss on Contracts Income per common share: Earnings Per Share, Basic and Diluted [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Effective tax rate Effective Income Tax Rate Reconciliation, Percent Insurance coverage deductible Loss Contingency Insurance Policy Deductible amount of Deductible Insurance Policy for Loss Contingency Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Wildfire Wildfire [Member] Wildfire [Member] Stock issued - other (in shares) Stock Issued During Period, Shares, Other Gain on sale of property and equipment Gain on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Beginning of period End of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Contract assets, net of allowances of $339 and $359, respectively Contract assets, net Contract assets, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Transmission Market Type Transmission [Member] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Net Period [Domain] Net Period [Domain] Bonds outstanding Guarantor Obligations, Maximum Exposure, Undiscounted Current assets: Assets, Current [Abstract] Other financing activities Proceeds from (Payments for) Other Financing Activities Leases [Abstract] Leases [Abstract] Entity Central Index Key Entity Central Index Key London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Security Exchange Name Security Exchange Name Shares exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Diluted (in shares) Weighted average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Schedule of Operating And Finance Leases, Disclosure [Table] Schedule of Operating And Finance Leases, Disclosure [Table] n/a Other comprehensive income (loss): Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Income Taxes Income Tax Disclosure [Text Block] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Interest rate margin Debt Instrument, Basis Spread on Variable Rate Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] 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. Schedule of shared excluded from calculation of dilute securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Remaining lease term Lessee Operating and Finance Leases Remaining Contract Term Lessee operating and finance leases remaining contract term. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Other income (expense): Nonoperating Income (Expense) [Abstract] Schedule of net asset position for contracts in process Long-Term Contract or Program Disclosure [Table Text Block] Credit Facility [Axis] Credit Facility [Axis] Net cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Deferred debt issuance costs Debt Issuance Costs, Line of Credit Arrangements, Net Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] 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 Interim Consolidated Financial Information Consolidation, Policy [Policy Text Block] Other Other Contract [Member] Purchase orders outstanding Purchase Commitment, Remaining Minimum Amount Committed Total current liabilities Liabilities, Current Leverage coverage ratio Leverage Coverage Ratio The Company has the option to expand the debt coverage ratio in the event of an acquisition. Cash paid for amounts included in the measurement of lease liabilities Cash Flow, Operating Activities, Lessee [Abstract] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Debt instrument restricted maximum liquidity Debt Instrument Restricted Maximum Liquidity Amount of company's consolidated liquidity restricted. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Title of 12(b) Security Title of 12(b) Security Statement [Table] Statement [Table] Other current assets Other Assets, Current Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Interest coverage ratio Debt Instrument Covenant Interest Coverage Ratio Represent the minimum interest coverage ratio under the credit agreement. Statistical Measurement [Axis] Statistical Measurement [Axis] Subsequent Event Subsequent Event [Member] Cover [Abstract] Cover [Abstract] Preferred Stock Preferred Stock [Member] 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. Goodwill Goodwill Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest 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. 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] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Operating lease cost Operating Lease, Cost Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Accrued loss provision, Change Increase Decrease In Accrued loss provision The increase (decrease) during the reporting period of the amount of accrued loss provision. Current portion of receivable for insurance claims in excess of deductibles Insurance Settlements Receivable, Current Option to terminate leases, period Lessee Operating and Finance Leases Option to Terminate Period Lessee, operating and finance leases, option to terminate, period. Accounting Standards Update 2016-13 [Member]