Name:	eepl_DiscountRateStandardizedMeasure
Namespace Prefix:	eepl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Average adjusted crude oil price used in the estimation of proved reserves.

No definition available.

Name:	eepl_EstimateOfProvedReservesCrudeOilPrice
Namespace Prefix:	eepl_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

Average adjusted natural gas price used in the estimation of proved reserves.

No definition available.

Name:	eepl_EstimateOfProvedReservesNaturalGasPrice
Namespace Prefix:	eepl_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

Net carrying cost of proved undeveloped acreage that is included in the Company's proved properties.

No definition available.

Name:	eepl_ProvedUndevelopedCarryingCost
Namespace Prefix:	eepl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62038-109447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447

Name:	us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Fractional interest owned based on working interests or other economic arrangements of lease area on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such area contains proved reserves.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
-Paragraph (b)