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Debt (Schedule Of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Capitalized lease obligations	$ 1,805us-gaap_CapitalLeaseObligations	$ 2,883us-gaap_CapitalLeaseObligations
Other	52us-gaap_OtherBorrowings	57us-gaap_OtherBorrowings
Total debt	329,982us-gaap_DebtAndCapitalLeaseObligations	335,440us-gaap_DebtAndCapitalLeaseObligations
Less: current maturities	18,680eme_CurrentMaturitiesOfLongTermDebtAndCapitalLeaseObligations	19,041eme_CurrentMaturitiesOfLongTermDebtAndCapitalLeaseObligations
Total long-term debt	311,302us-gaap_LongTermDebtAndCapitalLeaseObligations	316,399us-gaap_LongTermDebtAndCapitalLeaseObligations
2013 Term Loan
Debt Instrument [Line Items]
Term Loan	$ 328,125us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = eme_TermLoan2013Member	$ 332,500us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = eme_TermLoan2013Member	$ 350,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = eme_TermLoan2013Member

X

- Definition

Current maturities of long-term debt and capital lease obligations, excluding borrowings under revolving credit facility.

+ References

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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