XML 50 R38.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Revenue from Contracts with Customers - Schedule of Revenue. Remaining Performance Obligation, Expected Timing of Satisfaction (Details) $ in Thousands | Mar. 31, 2018 USD ($)
--- | ---
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | $ 3,603,743
UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 3,444,838
United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 1,133,811
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 1,822,381
United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 424,196
United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 64,450
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 158,905
Within One Year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 2,931,668
Within One Year | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 2,833,565
Within One Year | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 932,331
Within One Year | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 1,434,719
Within One Year | United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 402,065
Within One Year | United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 64,450
Within One Year | United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 98,103
Greater Than One Year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 672,075
Greater Than One Year | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 611,273
Greater Than One Year | United States Electrical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 201,480
Greater Than One Year | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 387,662
Greater Than One Year | United States Building Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 22,131
Greater Than One Year | United States Industrial Services [Member] | UNITED STATES |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | 0
Greater Than One Year | United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Remaining performance obligations | $ 60,802

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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_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: | us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eme_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTimeAxis=eme_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionWithinOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eme_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTimeAxis=eme_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionGreaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |