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:	srt-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:	srt-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

Leased area representing summation of fractional ownership working interest to whole on which oil and gas wells have not been drilled or completed that would permit production of economic quantities of oil and gas. Excludes area of undrilled acreage held by production under terms of lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
-Paragraph (b)

Name:	srt_GasAndOilAreaUndevelopedNet
Namespace Prefix:	srt_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

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