XML 55 R40.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Retirement Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Retirement Benefits [Abstract] |
Schedule of Changes in Benefit Obligations and Assets | The change in benefit obligations and assets of the UK Plan for the years ended December 31, 2017 and 2016 consisted of the following components (in thousands):
| 2017 |  | 2016
Change in pension benefit obligation |  |  |
Benefit obligation at beginning of year | $ | 306,731 |  |  | $ | 295,825 |
Interest cost | 8,622 |  |  | 10,320 |
Actuarial loss | 2,058 |  |  | 67,329 |
Benefits paid | (13,709 | ) |  | (12,044 | )
Foreign currency exchange rate changes | 28,916 |  |  | (54,699 | )
Benefit obligation at end of year | 332,618 |  |  | 306,731 |
Change in pension plan assets |  |  |  |  |
Fair value of plan assets at beginning of year | 257,236 |  |  | 263,555 |
Actual return on plan assets | 22,899 |  |  | 47,728 |
Employer contributions | 4,727 |  |  | 4,906 |
Benefits paid | (13,709 | ) |  | (12,044 | )
Foreign currency exchange rate changes | 24,815 |  |  | (46,909 | )
Fair value of plan assets at end of year | 295,968 |  |  | 257,236 |
Funded status at end of year | $ | (36,650 | ) |  | $ | (49,495 | )
Schedule of Net Periodic Benefit Cost Not yet Recognized | Amounts not yet reflected in net periodic pension cost and included in accumulated other comprehensive loss (in thousands):
| 2017 |  | 2016
Unrecognized losses | $ | 102,054 |  |  | $ | 102,943 |
Schedule of Weighted Average Assumptions Used Calculating Benefit Obligation | The weighted average assumptions used to determine benefit obligations as of December 31, 2017 and 2016 were as follows:
| 2017 |  | 2016
Discount rate | 2.5 | % |  | 2.7 | %
Schedule of Weighted Average Assumptions Used Calculate Net Periodic Pension Cost | The weighted average assumptions used to determine net periodic pension cost for the years ended December 31, 2017, 2016 and 2015 were as follows:
| 2017 |  | 2016 |  | 2015
Discount rate | 2.7 | % |  | 3.8 | % |  | 3.6 | %
Annual rate of return on plan assets | 5.3 | % |  | 6.2 | % |  | 6.3 | %
Components Of Net Periodic Pension Cost | The components of net periodic pension cost of the UK Plan for the years ended December 31, 2017, 2016 and 2015 were as follows (in thousands):
| 2017 |  | 2016 |  | 2015
Interest cost | $ | 8,622 |  |  | $ | 10,320 |  |  | $ | 11,603 |
Expected return on plan assets | (13,508 | ) |  | (14,227 | ) |  | (16,181 | )
Amortization of unrecognized loss | 2,942 |  |  | 2,047 |  |  | 2,526 |
Net periodic pension cost (income) | $ | (1,944 | ) |  | $ | (1,860 | ) |  | $ | (2,052 | )
Schedule of Weighted Average Asset Allocations and Weighted Average Target Allocations | The weighted average asset allocations and weighted average target allocations at December 31, 2017 and 2016 were as follows:
Asset Category | Target Asset Allocation |  | December 31, 2017 |  | December 31, 2016
Equity securities | 15.0 | % |  | 14.1 | % |  | 44.9 | %
Debt securities | 65.0 | % |  | 77.3 | % |  | 55.0 | %
Cash | 10.0 | % |  | 8.6 | % |  | 0.1 | %
Property | 10.0 | % |  | — | % |  | — | %
Total | 100.0 | % |  | 100.0 | % |  | 100.0 | %
Schedule of Plan Assets Fair Value Hierarchy | The following tables set forth by level, within the fair value hierarchy discussed in Note 10 - Fair Value Measurements, the fair value of assets of the UK Plan as of December 31, 2017 and 2016 (in thousands):
| Assets at Fair Value as of December 31, 2017
Asset Category | Level 1 |  | Level 2 |  | Level 3 |  | Total
Equity and equity like investments | $ | — |  |  | $ | 41,684 |  |  | $ | — |  |  | $ | 41,684 |
Corporate debt securities | — |  |  | 69,630 |  |  | 103,945 |  |  | 173,575 |
Government bonds | — |  |  | 55,207 |  |  | — |  |  | 55,207 |
Cash | 25,502 |  |  | — |  |  | — |  |  | 25,502 |
Total | $ | 25,502 |  |  | $ | 166,521 |  |  | $ | 103,945 |  |  | $ | 295,968 |
| Assets at Fair Value as of December 31, 2016
Asset Category | Level 1 |  | Level 2 |  | Level 3 |  | Total
Equity and equity like investments | $ | — |  |  | $ | 115,416 |  |  | $ | — |  |  | $ | 115,416 |
Corporate debt securities | — |  |  | 103,912 |  |  | — |  |  | 103,912 |
Government bonds | — |  |  | 37,473 |  |  | — |  |  | 37,473 |
Cash | 435 |  |  | — |  |  | — |  |  | 435 |
Total | $ | 435 |  |  | $ | 256,801 |  |  | $ | — |  |  | $ | 257,236 |
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets | The table below sets forth a summary of changes in the fair value of the UK Plan’s Level 3 assets for the year ended December 31, 2017 (in thousands):
Corporate Debt Securities | 2017
Start of year balance | $ | — |
Actual return on plan assets, relating to assets still held at reporting date | 1,858 |
Purchases, sales and settlements, net | 98,633 |
Change due to exchange rate changes | 3,454 |
End of year balance | $ | 103,945 |
Schedule of Expected Benefit Payments | The following estimated benefit payments are expected to be paid in the following years (in thousands):
| Pension Benefits
2018 | $ | 14,599 |
2019 | $ | 15,031 |
2020 | $ | 15,474 |
2021 | $ | 15,930 |
2022 | $ | 16,401 |
Succeeding five years | $ | 89,566 |
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets | The following table shows certain information for the UK Plan where the accumulated benefit obligation is in excess of plan assets as of December 31, 2017 and 2016 (in thousands):
| 2017 |  | 2016
Projected benefit obligation | $ | 332,618 |  |  | $ | 306,731 |
Accumulated benefit obligation | $ | 332,618 |  |  | $ | 306,731 |
Fair value of plan assets | $ | 295,968 |  |  | $ | 257,236 |
Schedule of Multiemployer Plans | The following table lists all domestic MEPPs to which our contributions exceeded $2.0 million in 2017. Additionally, this table also lists all domestic MEPPs to which we contributed in 2017 in excess of $0.5 million for MEPPs in the critical status, “red zone”, and $1.0 million in the endangered status, “orange or yellow zones”, as defined by the PPA (in thousands):
Pension Fund |  | EIN/Pension Plan Number |  | PPA Zone Status (1) |  | FIP/RP Status |  | Contributions |  | Contributions greater than 5% of total plan contributions (2) |  | Expiration date of CBA
| 2017 |  | 2016 |  |  | 2017 |  | 2016 |  | 2015 |
National Automatic Sprinkler Industry Pension Fund |  | 52-6054620 001 |  | Red |  | Red |  | Implemented |  | $ | 14,228 |  |  | $ | 11,075 |  |  | $ | 6,697 |  |  | No |  | May 2018 to March 2021
Sheet Metal Workers National Pension Fund |  | 52-6112463 001 |  | Yellow |  | Yellow |  | Implemented |  | 12,895 |  |  | 11,280 |  |  | 10,891 |  |  | No |  | May 2018 to July 2020
Plumbers & Pipefitters National Pension Fund |  | 52-6152779 001 |  | Yellow |  | Yellow |  | Implemented |  | 12,550 |  |  | 12,034 |  |  | 12,021 |  |  | No |  | April 2018 to May 2023
National Electrical Benefit Fund |  | 53-0181657 001 |  | Green |  | Green |  | N/A |  | 11,572 |  |  | 10,328 |  |  | 8,513 |  |  | No |  | February 2018 to May 2022
Pension, Hospitalization & Benefit Plan of the Electrical Industry- Pension Trust Account |  | 13-6123601 001 |  | Green |  | Green |  | N/A |  | 9,489 |  |  | 9,687 |  |  | 7,543 |  |  | No |  | April 2019 to June 2020
Plumbers Pipefitters & Mechanical Equipment Service Local Union 392 Pension Plan |  | 31-0655223 001 |  | Red |  | Red |  | Implemented |  | 6,084 |  |  | 5,202 |  |  | 5,554 |  |  | Yes |  | June 2019
Central Pension Fund of the IUOE & Participating Employers |  | 36-6052390 001 |  | Green |  | Green |  | N/A |  | 6,070 |  |  | 6,211 |  |  | 6,465 |  |  | No |  | February 2018 to June 2020
Sheet Metal Workers Pension Plan of Northern California |  | 51-6115939 001 |  | Red |  | Red |  | Implemented |  | 6,023 |  |  | 5,164 |  |  | 4,851 |  |  | No |  | June 2018 to June 2019
Electrical Contractors Association of the City of Chicago Local Union 134, IBEW Joint Pension Trust of Chicago Pension Plan 2 |  | 51-6030753 002 |  | Green |  | Green |  | N/A |  | 5,537 |  |  | 5,518 |  |  | 5,759 |  |  | No |  | June 2018
Pension Fund |  | EIN/Pension Plan Number |  | PPA Zone Status (1) |  | FIP/RP Status |  | Contributions |  | Contributions greater than 5% of total plan contributions (2) |  | Expiration date of CBA
| 2017 |  | 2016 |  |  | 2017 |  | 2016 |  | 2015 |
Electrical Workers Local No. 26 Pension Trust Fund |  | 52-6117919 001 |  | Green |  | Green |  | N/A |  | 4,441 |  |  | 3,390 |  |  | 2,620 |  |  | Yes |  | January 2018 to June 2019
Pipefitters Union Local 537 Pension Fund |  | 51-6030859 001 |  | Green |  | Green |  | N/A |  | 4,057 |  |  | 3,970 |  |  | 3,939 |  |  | Yes |  | Februray 2018 to August 2021
Southern California Pipe Trades Retirement Fund |  | 51-6108443 001 |  | Green |  | Green |  | N/A |  | 3,907 |  |  | 4,371 |  |  | 2,743 |  |  | No |  | June 2018 to August 2019
Eighth District Electrical Pension Fund |  | 84-6100393 001 |  | Green |  | Green |  | N/A |  | 3,786 |  |  | 3,444 |  |  | 3,411 |  |  | Yes |  | February 2018 to May 2022
Southern California IBEW-NECA Pension Trust Fund |  | 95-6392774 001 |  | Red |  | Red |  | Pending (3) |  | 3,669 |  |  | 3,289 |  |  | 2,894 |  |  | No |  | June 2019 to May 2020
Sheet Metal Workers Pension Plan of Southern California, Arizona & Nevada |  | 95-6052257 001 |  | Yellow |  | Yellow |  | Implemented |  | 3,268 |  |  | 2,946 |  |  | 2,310 |  |  | No |  | June 2018 to June 2020
U.A. Plumbers Local 24 Pension Fund |  | 22-6042823 001 |  | Green |  | Green |  | N/A |  | 3,092 |  |  | 3,147 |  |  | 2,431 |  |  | Yes |  | April 2020
NECA-IBEW Pension Trust Fund |  | 51-6029903 001 |  | Green |  | Green |  | N/A |  | 3,060 |  |  | 3,752 |  |  | 1,498 |  |  | No |  | May 2018 to May 2020
Northern California Pipe Trades Pension Plan |  | 94-3190386 001 |  | Green |  | Green |  | N/A |  | 2,963 |  |  | 6,495 |  |  | 3,544 |  |  | Yes |  | June 2018
San Diego Electrical Pension Plan |  | 95-6101801 001 |  | Green |  | Green |  | N/A |  | 2,862 |  |  | 2,216 |  |  | 2,109 |  |  | Yes |  | May 2019 to May 2020
Heating, Piping & Refrigeration Pension Fund |  | 52-1058013 001 |  | Green |  | Green |  | N/A |  | 2,437 |  |  | 2,402 |  |  | 1,948 |  |  | No |  | July 2019
U.A. Local 38 Defined Benefit Pension Plan |  | 94-1285319 001 |  | Green |  | Yellow |  | N/A |  | 2,097 |  |  | 1,521 |  |  | 1,526 |  |  | No |  | June 2018 to June 2023
Plumbing & Pipe Fitting Local 219 Pension Fund |  | 34-6682376 001 |  | Red |  | Red |  | Implemented |  | 1,335 |  |  | 838 |  |  | 1,262 |  |  | Yes |  | May 2020
Boilermaker-Blacksmith National Pension Trust |  | 48-6168020 001 |  | Red |  | Yellow |  | Pending (3) |  | 1,083 |  |  | 1,710 |  |  | 1,367 |  |  | No |  | May 2018 to September 2020
Steamfitters Local Union No. 420 Pension Plan |  | 23-2004424 001 |  | Red |  | Red |  | Implemented |  | 687 |  |  | 709 |  |  | 845 |  |  | No |  | May 2020
South Florida Electrical Workers Pension Plan and Trust |  | 59-6230530 001 |  | Red |  | Yellow |  | Implemented |  | 503 |  |  | 263 |  |  | 116 |  |  | No |  | August 2018
Other Multiemployer Pension Plans |  |  |  |  |  |  |  |  |  | 50,720 |  |  | 45,622 |  |  | 43,834 |  |  |  |  | Various
Total Contributions |  |  |  |  |  |  |  |  |  | $ | 179,216 |  |  | $ | 167,297 |  |  | $ | 147,056 |  |  |  |  |
_________________
(1) | The zone status represents the most recent available information for the respective MEPP, which may be 2016 or earlier for the 2017 year and 2015 or earlier for the 2016 year.
(2) | This information was obtained from the respective plan’s Form 5500 (“Forms”) for the most current available filing. These dates may not correspond with our fiscal year contributions. The above noted percentages of contributions are based upon disclosures contained in the plans’ Forms. Those Forms, among other things, disclose the names of individual participating employers whose annual contributions account for more than 5% of the aggregate annual amount contributed by all participating employers for a plan year. Accordingly, if the annual contribution of two or more of our subsidiaries each accounted for less than 5% of such contributions, but in the aggregate accounted for in excess of 5% of such contributions, that greater percentage is not available and accordingly is not disclosed.
(3) | For these respective plans, a funding surcharge was in effect during 2017.

X
- Definition Schedule of Fair Value Measurement Defined Benefit Plan Assets [Table Text Block] + References No definition available. + Details
Name: | eme_ScheduleOfFairValueMeasurementDefinedBenefitPlanAssetsTableTextBlock
Namespace Prefix: | eme_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Weighted Average Asset Allocations and Weighted Average Target Allocations [Table Text Block] + References No definition available. + Details
Name: | eme_ScheduleOfWeightedAverageAssetAllocationsAndWeightedAverageTargetAllocationsTableTextBlock
Namespace Prefix: | eme_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Weighted Average Assumptions Used Calculate Net Periodic Pension Cost [Table Text Block] + References No definition available. + Details
Name: | eme_ScheduleOfWeightedAverageAssumptionsUsedCalculateNetPeriodicPensionCostTableTextBlock
Namespace Prefix: | eme_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Weighted Average Assumptions Used Calculating Benefit Obligation [Table Text Block] + References No definition available. + Details
Name: | eme_ScheduleOfWeightedAverageAssumptionsUsedCalculatingBenefitObligationTableTextBlock
Namespace Prefix: | eme_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 + Details
Name: | us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets of pension plans and/or other employee benefit plans for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the quantitative and qualitative information related to multiemployer plans in which the employer participates. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
Name: | us-gaap_ScheduleOfMultiemployerPlansTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of net funded status of pension plans and/or other employee benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetFundedStatusTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income or loss that have not yet been recognized as components of net periodic benefit cost, such as the net gain (loss), net prior service cost or credit, and net transition asset or obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration