XML 49 R37.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue from Contracts with Customers - Schedule of Revenue, Remaining Performance Obligation (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 3,673,131
Remaining performance obligations, percent	100.00%
UNITED STATES
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 3,542,789
Remaining performance obligations, percent	96.00%
UNITED STATES | United States Electrical Construction And Facilities Services [Member]
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 1,037,796
Remaining performance obligations, percent	28.00%
UNITED STATES | United States Mechanical Construction And Facilities Services [Member]
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 1,970,393
Remaining performance obligations, percent	54.00%
UNITED STATES | United States Building Services [Member]
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 451,960
Remaining performance obligations, percent	12.00%
UNITED STATES | United States Industrial Services [Member]
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 82,640
Remaining performance obligations, percent	2.00%
UNITED KINGDOM | United Kingdom Building Services [Member] [Member]
Schedule of Remaining Performance Obligations [Line Items]
Remaining performance obligations	$ 130,342
Remaining performance obligations, percent	4.00%

X

- Definition

The percentage of remaining performance obligations to total remaining performance obligations as of the balance sheet date by reportable segment.

+ References

No definition available.

+ Details

Name:	eme_PercentageOfRevenueRemainingPerformanceObligations
Namespace Prefix:	eme_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

[Line Items] for Schedule of Remaining Performance Obligations [Table]

+ References

No definition available.

+ Details

Name:	eme_ScheduleofRemainingPerformanceObligationsLineItems
Namespace Prefix:	eme_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	srt_StatementGeographicalAxis=country_GB
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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