Name:	egl_CommitmentToReinvestNetCashProceedsOfNonOrdinaryCourseAssetSalesOrOtherNonOrdinaryCourseDispositionsOfPropertyOrCertainCasualtyEventsPeriod
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Debt instrument covenant compliance net first lien secured leverage ratio requirement one.

No definition available.

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Debt instrument covenant compliance net first lien secured leverage ratio requirement two.

No definition available.

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Debt Instrument, Covenant Compliance, Net Leverage Ratio

No definition available.

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Debt instrument maturity year.

No definition available.

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Debt instrument maximum secured Debt to EBITDA ratio.

No definition available.

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Debt instrument percentage redeemable with cash proceeds of equity offerings.

No definition available.

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Debt instrument periodic payment principal quarterly percentage.

No definition available.

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Balance Type:	na
Period Type:	duration

Debt instrument prepayment premium percentage.

No definition available.

Name:	egl_DebtInstrumentPrepaymentPremiumPercentage
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Debt instrument redemption period.

No definition available.

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Debt instrument redemption price to be offered as percentage of face amount of notes.

No definition available.

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First lien secured leverage ratio.

No definition available.

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Interest payments term.

No definition available.

Name:	egl_InterestPaymentsTerm
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Line of credit facility, additional commitments aggregate principal amount.

No definition available.

Name:	egl_LineOfCreditFacilityAdditionalCommitmentsAggregatePrincipalAmount
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Data Type:	xbrli:monetaryItemType
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Line of credit facility termination charge.

No definition available.

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Percentage of aggregate principal amount of Notes holders should own to declare Notes immediately payable if default occurs.

No definition available.

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Percentage of aggregate principal amount of notes that should be outstanding after redemption.

No definition available.

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Percentage of annual excess cash flow for prepayment of loan.

No definition available.

Name:	egl_PercentageOfAnnualExcessCashFlowForPrepaymentOfLoan
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Prepayment of debt.

No definition available.

Name:	egl_PrepaymentOfDebt
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Prepayment of outstanding term loan as percentage of net cash proceeds of non-ordinary course asset sales or other non-ordinary course dispositions of property or certain casualty events.

No definition available.

Name:	egl_PrepaymentOfOutstandingTermLoanAsPercentageOfNetCashProceedsOfNonOrdinaryCourseAssetSalesOrOtherNonOrdinaryCourseDispositionsOfPropertyOrCertainCasualtyEvents
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Prepayment of outstanding term loan percentage of net cash proceeds from issuance of debt except twenty sixteen credit facility.

No definition available.

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Rate at which additional interest accrues.

No definition available.

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Required investment period of net cash proceeds of non-ordinary course asset sales or other non-ordinary course dispositions of property or certain casualty events.

No definition available.

Name:	egl_RequiredInvestmentPeriodOfNetCashProceedsOfNonOrdinaryCourseAssetSalesOrOtherNonOrdinaryCourseDispositionsOfPropertyOrCertainCasualtyEvents
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Variable rate floor.

No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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Incremental percentage increase (decrease) in the stated rate on a debt instrument.

No definition available.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Balance Type:	na
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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.

No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Start date of debt instrument redemption period, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Percentage of principal amount of debt redeemed.

No definition available.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Gross amount of debt extinguished.

No definition available.

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Describe the approximate term of the guarantee or each group of similar guarantees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Name:	us-gaap_LineOfCredit
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Balance Type:	credit
Period Type:	instant

Average amount borrowed under the credit facility during the period.

No definition available.

Name:	us-gaap_LineOfCreditFacilityAverageOutstandingAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

No definition available.

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
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Data Type:	num:percentItemType
Balance Type:	na
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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
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Balance Type:	credit
Period Type:	instant

The effective interest rate during the reporting period.

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Balance Type:	credit
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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

No definition available.

Name:	us-gaap_RepaymentsOfDebt
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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Name:	dei_LegalEntityAxis=us-gaap_GuarantorSubsidiariesMember
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Data Type:	na
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Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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Data Type:	na
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Name:	us-gaap_StatementScenarioAxis=egl_ScenarioOneMember
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Data Type:	na
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