XML 47 R35.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 1,953,886	$ 1,895,937	$ 3,854,274	$ 3,787,669
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		1,848,379	1,816,779	3,641,877	3,629,493
United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		479,542	449,222	934,294	892,238
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		740,657	741,817	1,439,504	1,412,946
United States Building Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		461,033	438,264	915,785	878,294
United States Industrial Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		167,147	187,476	352,294	446,015
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		105,507	$ 79,158	212,397	$ 158,176
Operating Segments [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		481,011		936,793
Operating Segments [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		743,641		1,445,713
Intersegment Eliminations [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		(1,469)		(2,499)
Intersegment Eliminations [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		(2,984)		(6,209)
Commercial Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 199,283		$ 383,665
Percent of total segment		41.00%		41.00%
Commercial Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 263,660		$ 495,511
Percent of total segment		35.00%		34.00%
Institutional Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 31,060		$ 59,068
Percent of total segment		6.00%		6.00%
Institutional Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 78,079		$ 143,706
Percent of total segment		11.00%		10.00%
Hospitality Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 7,289		$ 12,805
Percent of total segment		2.00%		1.00%
Hospitality Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 21,191		$ 47,718
Percent of total segment		3.00%		3.00%
Manufacturing Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 94,018		$ 179,812
Percent of total segment		20.00%		19.00%
Manufacturing Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 99,047		$ 198,923
Percent of total segment		13.00%		14.00%
Healthcare Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 36,679		$ 75,186
Percent of total segment		8.00%		8.00%
Healthcare Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 60,006		$ 126,120
Percent of total segment		8.00%		9.00%
Transportation Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 72,511		$ 143,775
Percent of total segment		15.00%		16.00%
Transportation Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 4,724		$ 9,930
Percent of total segment		1.00%		1.00%
Water and Wastewater Market Sector [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 6,140		$ 10,753
Percent of total segment		1.00%		1.00%
Water and Wastewater Market Sector [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 42,519		$ 79,270
Percent of total segment		6.00%		5.00%
Short Duration Projects [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation	[1]	$ 25,195		$ 54,725
Percent of total segment		5.00%		6.00%
Short Duration Projects [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation	[1]	$ 76,114		$ 160,009
Percent of total segment		10.00%		11.00%
Service Work [Member] | United States Electrical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 8,836		$ 17,004
Percent of total segment		2.00%		2.00%
Service Work [Member] | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 98,301		$ 184,526
Percent of total segment		13.00%		13.00%
Service Work [Member] | United Kingdom Building Services [Member] [Member] | UNITED KINGDOM
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 54,998		$ 110,273
Percent of total segment		52.00%		52.00%
Commercial Site-Based Services [Member] | United States Building Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 119,043		$ 265,804
Percent of total segment		26.00%		29.00%
Government Site-Based Services [Member] | United States Building Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 55,147		$ 110,556
Percent of total segment		12.00%		12.00%
Mechanical Services [Member] | United States Building Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 260,249		$ 487,591
Percent of total segment		56.00%		53.00%
Energy Services [Member] | United States Building Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 26,594		$ 51,834
Percent of total segment		6.00%		6.00%
Field Services [Member] | United States Industrial Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 125,527		$ 273,617
Percent of total segment		75.00%		78.00%
Shop Services [Member] | United States Industrial Services [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 41,620		$ 78,677
Percent of total segment		25.00%		22.00%
Projects & Extras [Member] | United Kingdom Building Services [Member] [Member] | UNITED KINGDOM
Disaggregation of Revenue [Line Items]
Revenues, disaggregation		$ 50,509		$ 102,124
Percent of total segment		48.00%		48.00%
[1] Represents those projects which generally are completed within three months or less.

X

- Definition

The percentage of total segment revenues.

+ References

No definition available.

+ Details

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

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

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

+ Details

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

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

X

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_CommercialMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_InstitutionalMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_HospitalityMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_ManufacturingMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_HealthcareMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_TransportationMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_WaterandWastewaterMarketSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_ShortDurationProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_ServiceWorkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_CommercialSiteBasedServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_GovernmentSiteBasedServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_MechanicalServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_EnergyServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_FieldServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_ShopServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	eme_CategoriesAxis=eme_ProjectsExtrasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: