Line Of Credit Facility Increase To Current Borrowing Capacity

No definition available.

Name:	epl_LineOfCreditFacilityIncreaseToCurrentBorrowingCapacity
Namespace Prefix:	epl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Definition

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.

+ References

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 210.5-02.19(b),22(b))

-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 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

+ References

No definition available.

+ Details

Name:	us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Organization and Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Jan. 15, 2014 Nexen Acquisition [Member]	Sep. 26, 2013 West Delta 29 Acquisition [Member]	May 15, 2012 South Timbalier Acquisition [Member]	Oct. 31, 2012 Hilcorp Acquisition [Member]	Oct. 31, 2012 Hilcorp Acquisition [Member]	Feb. 14, 2011 ASOP Acquisition [Member]	Nov. 17, 2011 Main Pass Acquisition [Member]	Apr. 02, 2013 Non-Operated Bay Marchand Field Disposition [Member]	Jan. 17, 2014 Revolving Credit Facility [Member]	Nov. 26, 2013 Revolving Credit Facility [Member]	Oct. 31, 2012 Revolving Credit Facility [Member]	May 01, 2012 Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Line of Credit Facility, Current Borrowing Capacity									$ 475.0	$ 425.0	$ 425.0	$ 200.0
Line Of Credit Facility Increase To Current Borrowing Capacity									50.0
Acquired certain interests in producing oil and natural gas assets	70.4	21.8	32.4	550.0	550.0	200.7	38.6
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds		$ 16.5						$ 62.8