Document and Entity Information [Abstract] Document and Entity Information [Abstract] 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 Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Trading Symbol Entity Common Stock, Shares Outstanding Entity Shell Company Entity Emerging Growth Company Entity Small Business Statement of Financial Position [Abstract] Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Statement [Line Items] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Beginning of period End of period Accounts Receivable, Net, Current Accounts receivable, net of allowances of $1,331 and $605, respectively Accounts receivable, net current Contract with Customer, Asset, Net, Current Contract assets Contract with Customer, Asset, Net, Current 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 Property and equipment, net of accumulated depreciation of $253,495 and $231,391, respectively Property, Plant and Equipment, Net Goodwill Goodwill Goodwill net carrying amount Intangible Assets, Net (Excluding Goodwill) Intangible assets, net of accumulated amortization of $7,031 and $5,183, respectively 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 Total assets Liabilities [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Deferred Income Tax Liabilities, Net Deferred income tax liabilities Long-term Debt, Excluding Current Maturities Long-term debt Long-term debt Long-term principal obligations Self Insurance Reserve, Noncurrent Accrued self-insurance Capital Lease Obligations, Noncurrent Capital lease obligations, net of current maturities Long-term capital lease obligations Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest Stockholders' Equity Attributable to Parent Total stockholders' equity attributable to MYR Group Inc. Preferred Stock, Value, Outstanding Preferred stock – $0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at December 31, 2018 and December 31, 2017 Common Stock, Value, Issued Common stock – $0.01 par value per share; 100,000,000 authorized shares; 16,564,961 and 16,464,757 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive income (loss) Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total stockholders' equity Balance Balance Liabilities and Equity Total liabilities and stockholders' equity Liabilities, Current [Abstract] Current liabilities Self Insurance Reserve, Current Current portion of accrued self-insurance Other Liabilities, Current Other current liabilities Other current liabilities, total Liabilities, Current Total current liabilities Capital Lease Obligations, Current Current portion of capital lease obligations Less: Current portion of capital lease obligations Accounts Payable, Current Accounts payable Contract with Customer, Liability, Current Contract liabilities Contract liabilities Contract liabilities Long-term Debt, Current Maturities Current portion of long-term debt Less: Current Portion of long-term debt Less: Current portion of equipment notes Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts receivable Less: Allowance for doubtful accounts Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, accumulated depreciation Less: Accumulated depreciation and amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, accumulated amortization 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) Income Statement [Abstract] Legal Entity [Axis] Entity [Domain] Revenue from Contract with Customer, Excluding Assessed Tax Contract revenues Revenues recognized Contract revenues 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 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 Revenues Income from operations 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 Equity Method Investments, Income Taxes, Noncontrolling Interest Income before provision for income taxes Income Tax Expense (Benefit) Income tax expense Income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income Earnings Per Share [Abstract] Income per common share attributable to MYR Group Inc.: Net income per share attributable to MYR Group Inc.: Earnings Per Share, Basic - Basic (in dollars per share) Basic Basic earnings per share attributable to MYR Group Earnings Per Share, Diluted - Diluted (in dollars per share) Diluted earnings per share attributable to MYR Group (in dollars per share) Diluted Diluted earnings per share attributable to MYR Group 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 Weighted Average Number of Shares Outstanding, Diluted - Diluted (in shares) Weighted average common shares outstanding, diluted 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 Net Income (Loss) Attributable to Parent Net income attributable to MYR Group Inc. Net income Net income attributable to MYR Group Inc. Net income attributable to MYR Group Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Less: net income – noncontrolling interests Less: net income – noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income attributable to MYR Group Inc. Statement of Stockholders' Equity [Abstract] Shares, Outstanding Balance (in shares) Balance (in shares) 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) Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Tax benefit from stock-based awards 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) Stock Issued During Period, Value, Other Stock issued – other Stock Issued During Period, Shares, Other Stock issued - other (in shares) Cumulative Effect of New Accounting Principle in Period of Adoption Adjustment to adopt ASU No. 2016-09 New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Adjustment to adopt ASC 606 Noncontrolling Interest, Increase from Subsidiary Equity Issuance Noncontrolling interest acquired Equity Components [Axis] Equity Component [Domain] Preferred Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Parent [Member] MYR Group Inc. Shareholders' Equity [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (loss) [Member] Statement of Cash Flows [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) 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] Supplemental Cash Flow Information: Income Taxes Paid Income taxes payments Interest Paid, Excluding Capitalized Interest, Operating Activities Interest payments Noncash Financing Activities [Abstract] Noncash financing activities: Capital Lease Obligations Incurred Capital lease obligations initiated 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 of property and equipment Depreciation and amortization expense 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 Contract liabilities Changes in 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 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 Payments To Acquire Assets Net Of Cash Acquired Cash paid for acquisitions, net of cash acquired The cash outflow associated with the acquisition of a assets, net of the cash acquired from the purchase. 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 Proceeds from Notes Payable Borrowings under equipment notes Net Cash Provided by (Used in) Financing Activities Net cash flows provided by (used in) financing activities Effect of Exchange Rate on Cash Effect of exchange rate changes on cash Proceeds from (Payments for) Other Financing Activities Other financing activities Repayments of Long-term Capital Lease Obligations Payment of principal obligations under capital leases Proceeds from Stock Options Exercised Proceeds from exercise of stock options Payments for Repurchase of Common Stock Repurchase of common shares Payments for repurchase of common stock Noncash Investing Activities [Abstract] Noncash investing activities: Noncash Investing Activities Abstract Capital Expenditures Incurred but Not yet Paid Acquisition of property and equipment for which payment is pending Acquisition Of Property Under Capital Lease Arrangements Acquisition of property under capital lease arrangements "Its represent amount of acquisition of property under capital lease arrangements. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Organization, Business and Significant Accounting Policies Business Combinations [Abstract] Business Combination Disclosure [Text Block] Acquisitions Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Text Block] Revenue Recognition Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Receivables [Abstract] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Payables and Accruals [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Liabilities Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Commitments and Contingencies Disclosure [Abstract] Commitments Contingencies and Guarantees [Text Block] Commitments and Contingencies Leases [Abstract] Leases of Lessee Disclosure [Text Block] Lease Obligations Disclosure of Compensation Related Costs, Share-based Payments [Abstract]