XML 42 R26.htm IDEA: XBRL DOCUMENT v2.4.1.9

Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Contract revenues:	$ 244,148us-gaap_SalesRevenueServicesNet	$ 215,638us-gaap_SalesRevenueServicesNet
Income from operations	11,597us-gaap_OperatingIncomeLoss	10,132us-gaap_OperatingIncomeLoss
T&D [Member]
Segment Reporting Information [Line Items]
Contract revenues:	189,223us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = myrg_TdMember	162,044us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = myrg_TdMember
Income from operations	16,834us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = myrg_TdMember	13,962us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = myrg_TdMember
C&I [Member]
Segment Reporting Information [Line Items]
Contract revenues:	54,925us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = myrg_CiMember	53,594us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = myrg_CiMember
Income from operations	2,836us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = myrg_CiMember	3,367us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = myrg_CiMember
General Corporate [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (8,073)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember	$ (7,197)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueServicesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=myrg_CiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=myrg_TdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: