XML 63 R47.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Acquisition - Summary of acquisition by acquisition (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 04, 2022 | Dec. 31, 2022 | Dec. 31, 2023
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 115,847 | $ 116,953
Powerline Plus Companies |  |  |
Business Acquisition [Line Items] |  |  |
Cash paid | $ 114,429 | 114,429 |
Contingent consideration - fair value at acquisition date | 10,608 | 865 |
Net asset and other adjustments | 563 | 84 |
Total consideration, net of estimated net asset adjustments | 125,600 | 115,378 |
Less: Acquired cash | (3,853) | (3,853) |
Total consideration less cash acquired, net of net asset and other adjustments | 121,747 | 111,525 |
Cash paid, Measurement Period Adjustments |  | 0 |
Contingent consideration - fair value at acquisitions date, Measurement Period Adjustments |  | (9,743) |
Net asset and other adjustments, Measurement Period Adjustments |  | (479) |
Total consideration, net of estimated net asset adjustments, Measurement Period Adjustments |  | (10,222) |
Less: Acquired cash, Measurement Period Adjustments |  | 0 |
Total consideration less cash acquired, net of net asset and other adjustments, Measurement Period Adjustment |  | (10,222) |
Cash and cash equivalents | 3,853 | 3,853 |
Accounts receivable | 12,131 | 12,079 |
Contract assets | 12,443 | 12,591 |
Refundable income taxes | 394 | 876 |
Prepaid expenses and other current assets | 1,233 | 1,112 |
Property and equipment | 10,366 | 11,943 |
Operating lease right-of-use assets | 6,631 | 6,120 |
Intangible assets | 0 | 50,246 |
Accounts payable | (8,095) | (8,561) |
Contract liabilities | (1,597) | (1,692) |
Current portion of operating lease obligations | (1,224) | (1,224) |
Current portion of finance lease obligations | (1,492) | (1,492) |
Deferred income tax liabilities | (1,358) | (15,349) |
Operating lease obligations, net of current maturities | (4,897) | (4,897) |
Finance lease obligations, net of current maturities | (3,243) | (3,243) |
Net identifiable assets and liabilities | 25,145 | 62,362 |
Unallocated intangible assets | 56,650 | 0 |
Total acquired assets and liabilities | 81,795 | 62,362 |
Goodwill | $ 43,805 | 53,016 |
Cash and cash equivalents, Measurement Period Adjustments |  | 0 |
Accounts receivable, Measurement Period Adjustments |  | (52) |
Contract assets, Measurement Period Adjustments |  | 148 |
Refundable income taxes, Measurement Period Adjustments |  | 482 |
Prepaid expenses and other current assets, Measurement Period Adjustments |  | (121) |
Property and equipment, Measurement Period Adjustments |  | 1,577 |
Operating lease right-of-use asset, Measurement Period Adjustments |  | (511) |
Intangible assets, Measurement Period Adjustments |  | 50,246 |
Accounts payable, Measurement Period Adjustments |  | (466) |
Contract liabilities, Measurement Period Adjustments |  | (95) |
Current portion of operating lease obligations, Measurement Period Adjustments |  | 0 |
Current portion of finance lease obligations, Measurement Period Adjustments |  | 0 |
Deferred income tax liabilities, Measurement Period Adjustments |  | (13,991) |
Operating lease obligations, net of current maturities |  | 0 |
Finance lease obligations, net of current maturities, Measurement Period Adjustments |  | 0 |
Net identifiable assets and liabilities, Measurement Period Adjustments |  | 37,217 |
Unallocated intangible assets, Measurement Period Adjustments |  | (56,650) |
Total acquired assets and liabilities, Measurement Period Adjustments |  | (19,433) |
Goodwill, Measurement Period Adjustments |  | $ 9,211 |

X
- Definition Business Combination, Consideration Transferred, Less Cash Acquired, Net Of Estimated Net Asset Adjustments + References No definition available. + Details
Name: | myrg_BusinessCombinationConsiderationTransferredLessCashAcquiredNetOfEstimatedNetAssetAdjustments
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Consideration Transferred, Net Of Estimated Net Asset Adjustments + References No definition available. + Details
Name: | myrg_BusinessCombinationConsiderationTransferredNetOfEstimatedNetAssetAdjustments
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of preliminary estimated net asset adjustments consisting of acquisition-date fair value. + References No definition available. + Details
Name: | myrg_BusinessCombinationPreliminaryEstimatedNetAssetAdjustments
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable, Net + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsReceivableNet
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Acquired + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashAcquired
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash and cash equivalents + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashAndCashEquivalents
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred, Less Cash Acquired + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferredLessCashAcquired
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contingent Consideration, Liability + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentContingentConsiderationLiability
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination Provisional Information, Initial Accounting Incomplete, Adjustment, Contract with Customer Asset Net Current + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentContractWithCustomerAssetNetCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contract With Customer Liability, Net Current + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentContractWithCustomerLiabilityNetCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Finance Lease Obligations, Current + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinanceLeaseObligationsCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Finance Lease Obligations, Net Of Current Maturities + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinanceLeaseObligationsNetOfCurrentMaturities
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination Provisional Information Initial Accounting Incomplete Adjustment Goodwill + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Income Taxes Receivable + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIncomeTaxesReceivable
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Operating Lease, Liability, Current + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOperatingLeaseLiabilityCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Operating Lease, Liability, Noncurrent + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOperatingLeaseLiabilityNoncurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Operating Lease Right-Of-Use Assets + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOperatingLeaseRightOfUseAsset
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Payments To Acquire Businesses + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPaymentsToAcquireBusinesses
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination Provisional Information Initial Accounting Incomplete Adjustment Preliminary Estimated Net Asset Adjustments + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPreliminaryEstimatedNetAssetAdjustments
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid Expenses And Other Assets + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPrepaidExpensesAndOtherAssets
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination Provisional Information Initial Accounting Incomplete Adjustment Recognized Identifiable Assets Acquired and Liabilities Assumed Excluding Intangible Asset Net + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedExcludingIntangibleAssetNet
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment Recognized Identifiable Assets Acquired, Intangible Asses Excluding Goodwill, and Liabilities Assumed, Net + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRecognizedIdentifiableAssetsAcquiredIntangibleAssesExcludingGoodwillAndLiabilitiesAssumedNet
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Unallocated Intangible Assets + References No definition available. + Details
Name: | myrg_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentUnallocatedIntangibleAssets
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Contract With Customer Asset, Net Current + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAssetNetCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Income Taxes Receivable + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivable
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Contract With Customer Liability, Net + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomerLiabilityNet
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Finance Lease + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesFinanceLease
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssets
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Finance Lease + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesFinanceLease
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease, Liability, Current + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilityCurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease, Liability, Noncurrent + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilityNoncurrent
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Right-Of-Use Assets + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired, Intangible Assets Excluding Goodwill, And Liabilities Assumed, Net + References No definition available. + Details
Name: | myrg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredIntangibleAssetsExcludingGoodwillAndLiabilitiesAssumedNet
Namespace Prefix: | myrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479668/805-30-25-6 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 35 -Paragraph 1 -Subparagraph (b) -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479613/805-30-35-1 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-4A + Details
Name: | us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-4A + Details
Name: | us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to property, plant, and equipment acquired in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-4A + Details
Name: | us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479303/805-10-55-37 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479303/805-10-55-37 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-12 + Details
Name: | us-gaap_CashAcquiredFromAcquisition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482548/350-20-55-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482598/350-20-45-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=myrg_PowerlinePlusCompaniesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |