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v2.4.1.9

Income Taxes (Details 1) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Differences between the U.S. federal statutory rate and the Company's effective tax rate for continuing operations |  |  |
U.S federal statutory rate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of U.S. federal income tax expense | 3.60%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 3.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 3.80%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Provision to return adjustments, net | 0.20%myrg_EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustmentsNet | (0.30%)myrg_EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustmentsNet | (0.20%)myrg_EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustmentsNet
Domestic production/manufacturing deduction | (2.30%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities | (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities | (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
Non-deductible meals and entertainment | 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment | 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment | 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment
Research and development credit | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Other, net | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 0.50%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective rate | 36.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 36.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 37.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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- Definition The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate attributable to provision to return adjustments. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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