XML 40 R42.htm IDEA: XBRL DOCUMENT
v3.20.1

Debt - Summary of total debt (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
Total debt | $ 161,384 | $ 165,824
Less: current portion of long-term debt | (8,127) | (8,737)
Long-term debt | 153,257 | 157,087
Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | $ 59,827 | 62,004
Revolving Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Term (years) | 5 years |
Total debt | $ 101,557 | 103,820
Equipment Note One [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 4.16% |
Term (years) | 5 years |
Total debt | $ 9,697 | 10,643
Equipment Note Two [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 4.23% |
Term (years) | 7 years |
Total debt | $ 10,643 | 11,200
Equipment Note Three [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 3.97% |
Term (years) | 5 years |
Total debt | $ 1,953 | 1,953
Equipment Note Four [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 4.02% |
Term (years) | 7 years |
Total debt | $ 2,108 | 2,108
Equipment Note Five [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 4.01% |
Term (years) | 7 years |
Total debt | $ 1,751 | 1,751
Equipment Note Six [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 2.89% |
Term (years) | 7 years |
Total debt | $ 14,286 | 14,286
Equipment Note Seven [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 3.09% |
Term (years) | 5 years |
Total debt | $ 8,359 | 9,033
Equipment Note Eight [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 2.75% |
Term (years) | 5 years |
Total debt | $ 6,496 | 6,496
Equipment Note Nine [Member] | Notes Payable to Banks [Member] |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate (per annum) | 3.01% |
Term (years) | 7 years |
Total debt | $ 4,534 | $ 4,534

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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 No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableToBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=myrg_EquipmentNoteNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |