Name:	ede_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrentGross
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the portion of long-term debt and capital lease obligations which are due in one year or less in the future and the amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsCurrentObligationsAndUnamortizedDiscount
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due within the next twelve months following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueCurrent
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due in year five following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueInFiveYears
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due in year four following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueInFourYears
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due in year three following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueInThreeYears
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due in year two following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueInTwoYears
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of long-term debt and capital lease obligations including current obligations and unamortized discount due after year five following the date of the latest balance sheet presented in the financial statements.

No definition available.

Name:	ede_LongTermDebtAndCapitalLeaseObligationsFutureMinimumPaymentsDueThereafter
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section H