Document and Entity Information [Abstract] Document and Entity Information Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Public Float Entity Voluntary Filers Entity Well-known Seasoned Issuer Trading Symbol Entity Interactive Data Current Entity Common Stock, Shares Outstanding Entity Emerging Growth Company Entity Small Business Entity Current Reporting Status Entity Shell Company UNAUDITED CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets Cash and Cash Equivalents, at Carrying Value End of period Beginning of period Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net Accounts receivable, net of allowances of $3,364 and $1,331, respectively Contract with Customer, Asset, Net, Current Contract assets Contract assets Insurance Settlements Receivable, Current Current portion of receivable for insurance claims in excess of deductibles Income Taxes Receivable, Current Refundable income taxes Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Total property and equipment, net Property and equipment, net of accumulated depreciation of $272,865 and $253,495, respectively Additional right of use lease assets Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Goodwill Goodwill, Net Carrying Amount Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible assets, net of accumulated amortization of $10,880 and $7,031, respectively Total intangible assets, Net Carrying Amount Insurance Settlements Receivable, Noncurrent Receivable for insurance claims in excess of deductibles Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment in joint venture Other Assets, Noncurrent Other assets Assets Identifiable assets Total assets Liabilities [Abstract] Liabilities LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current Current liabilities Long-term Debt, Current Maturities Less: current portion of equipment notes Less: current portion of long-term debt Current portion of long-term debt Operating Lease, Liability, Current Less: current portion of finance and operating lease obligations Current portion of operating lease obligations Operating lease obligations Finance Lease, Liability, Current Less: current portion of finance and operating lease obligations Current portion of finance lease obligations Finance lease obligation Accounts Payable, Current Accounts payable Contract with Customer, Liability, Current Contract liabilities Contract liabilities Contract liabilities Self Insurance Reserve, Current Current portion of accrued self-insurance Other Liabilities, Current Total other current liabilities Other current liabilities Liabilities, Current Total current liabilities Deferred Income Tax Liabilities, Net Deferred income tax liabilities Long-term Debt, Excluding Current Maturities Long-term principal obligations Long-term debt Long-term debt Self Insurance Reserve, Noncurrent Accrued self-insurance Additional operating lease liabilities Operating Lease, Liability, Noncurrent Operating lease obligations Operating lease obligations, net of current maturities Long-term finance and operating lease obligations Long-term finance and operating lease obligations Finance Lease, Liability, Noncurrent Finance lease obligations, net of current maturities Finance lease obligations Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity Preferred Stock, Value, Outstanding Preferred stock-$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at December 31, 2019 and December 31,2018 Common Stock, Value, Issued Common stock-$0.01 par value per share; 100,000,000 authorized shares; 16,648,616 and 16,564,961 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Total stockholders' equity attributable to MYR Group Inc. Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Allowance for Doubtful Accounts Receivable, Current Less: Allowance for doubtful accounts Allowance for doubtful accounts receivable Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation and amortization Property and equipment, accumulated depreciation Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, accumulated amortization Amortizable Intangible Assets, Accumulated Amortization Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME Contract revenues Revenue from Contract with Customer, Excluding Assessed Tax Contract revenues Amount Revenues Contract revenues Cost of Goods and Services Sold Contract costs Gross Profit Gross profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Amortization of Intangible Assets Intangible asset amortization Amortization of intangible assets Gain (Loss) on Disposition of Property Plant Equipment Gain on sale of property and equipment Gain on sale of property and equipment Operating Income (Loss) Income from operations Income from operations Increase (decrease) in operating income Nonoperating Income (Expense) [Abstract] Other income (expense): Investment Income, Interest Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other income (expense), net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income tax expense Income before income taxes Income tax expense Income Tax Expense (Benefit) Income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income Net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest. Less: net income (loss) attributable to noncontrolling interest Less: net income (loss) attributable to noncontrolling interest Net income attributable to MYR Group Inc. Net Income (Loss) Attributable to Parent Net income attributable to MYR Group Net income attributable to MYR Group Inc. Increase (decrease) in net income Earnings Per Share. Net income per share attributable to MYR Group Inc.: Income per common share attributable to MYR Group Inc.: Earnings Per Share, Basic Basic earnings per share attributable to MYR Group (in dollars per share) Basic (in dollars per share) Basic (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Diluted earnings per share attributable to MYR Group (in dollars per share) Increase (decrease) in diluted earnings per common share (in dollars per share) Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of common shares and potential common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted average common shares outstanding, diluted (in shares) Diluted (in shares) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income attributable to MYR Group Inc. Statement of Stockholders' Equity Statement [Table] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock [Member] Preferred Stock [Member] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-In Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings [Member] Parent [Member] MYR Group Inc. Stockholders' Equity [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Shares, Outstanding Balance (in shares) Balance (in shares) Cumulative Effect of New Accounting Principle in Period of Adoption Adjustment to adopt new accounting principle Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock issued under compensation plans, net Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock issued under compensation plans, net (in shares) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Stock Repurchased and Retired During Period, Value Shares repurchased Stock Repurchased and Retired During Period, Shares Shares repurchased (in shares) Noncontrolling Interest, Increase from Subsidiary Equity Issuance Noncontrolling interest acquired Stock Issued During Period, Value, Other Stock issued-other Stock Issued During Period, Shares, Other Stock issued - other (in shares) UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash flows provided by (used in) operating activities: Depreciation Depreciation and amortization expense Depreciation and amortization of property and equipment Share-based Compensation Stock-based compensation expense Deferred Income Taxes and Tax Credits Deferred income taxes Other Noncash Income (Expense), Total Other non-cash items Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Contract with Customer, Asset Contract assets Changes in contract assets Changes in contract assets Increase (Decrease) in Insurance Settlements Receivable Receivable for insurance claims in excess of deductibles Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Contract with Customer, Liability Changes in contract liabilities Contract liabilities Increase (Decrease) in Self Insurance Reserve Accrued self-insurance Increase (Decrease) in Other Operating Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities Net cash flows provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment The cash outflow associated with the acquisition of a assets, net of the cash acquired from the purchase. Payments To Acquire Assets Net Of Cash Acquired Cash paid for acquisitions, net of cash acquired Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities Net cash flows used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from (Repayments of) Lines of Credit Net borrowings (repayments) under revolving lines of credit Repayments of Notes Payable Payment of principal obligations under equipment notes Finance Lease, Principal Payments Payment of principal obligations under finance leases Proceeds from Notes Payable Borrowings under equipment notes Proceeds from Stock Options Exercised Proceeds from exercise of stock options Payments of Debt Restructuring Costs Debt refinancing costs Payments for Repurchase of Common Stock Repurchase of common shares Proceeds from (Payments for) Other Financing Activities Other financing activities Net Cash Provided by (Used in) Financing Activities Net cash flows provided by financing activities Effect of Exchange Rate on Cash Effect of exchange rate changes on cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Cash and cash equivalents: Supplemental Cash Flow Information [Abstract] Other information: Supplemental Cash Flow Information: No definition available. Interest and Income Taxes Paid [Abstract] Cash paid during the period for: Income Taxes Paid Income taxes payments Interest Paid, Excluding Capitalized Interest, Operating Activities Interest payments Noncash Investing Activities Abstract Noncash Investing Activities [Abstract] Noncash investing activities: Capital Expenditures Incurred but Not yet Paid Acquisition of property and equipment for which payment is pending Organization, Business and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Organization, Business and Significant Accounting Policies Acquisitions Business Combination Disclosure [Text Block] Acquisitions Contract Assets and Liabilities Long-term Contracts or Programs Disclosure [Text Block] Contract Assets and Liabilities Lease Obligations The entire disclosure for lessee, operating and finance leases. Lessee Operating And Finance Leases [Text Block] Lease Obligations Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Liabilities Debt Debt Disclosure [Text Block] Debt Revenue Recognition Revenue from Contract with Customer [Text Block] Revenue Recognition Income Taxes Income Tax Disclosure [Text Block] Income Taxes Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Commitments and Contingencies Stock-Based Compensation