Represents the ratio of total debt to EBITDA to be maintained under the financial covenants.

No definition available.

Name:	exlp_DebtInstrumentCovenantTotalDebtToEBITDARatio
Namespace Prefix:	exlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ratio of total debt to EBITDA to be maintained under the financial covenants, on occurrence of certain events specified in the senior secured credit agreement.

+ References

No definition available.

+ Details

Name:	exlp_DebtInstrumentCovenantTotalDebtToEBITDARatioOnOccurrenceOfCertainEvents
Namespace Prefix:	exlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the maximum ratio of total debt to EBITDA required during the period under the terms of the partnership credit agreement.

+ References

No definition available.

+ Details

Name:	exlp_DebtInstrumentFinancialCovenantTotalDebtToEbitdaRatio
Namespace Prefix:	exlp_
Data Type:	xbrli:pureItemType
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) and considering any amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	exlp_LineOfCreditFacilityCurrentAvailableBorrowingCapacity
Namespace Prefix:	exlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of increase (decrease) in maximum borrowing capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	exlp_LineOfCreditFacilityMaximumBorrowingCapacityIncreaseDecrease
Namespace Prefix:	exlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

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

- Definition

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.

+ 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_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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 210.5-02.22)

-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

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=exlp_RevolvingCreditFacilityDueMay2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=exlp_TermLoanFacilityDueMay2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Details 2) (USD $)	3 Months Ended	9 Months Ended	1 Months Ended
Long-Term Debt (Details 2) (USD $)	Mar. 31, 2015	Mar. 31, 2015	Feb. 28, 2015	Dec. 31, 2014
Long-Term Debt
Long-term debt	$ 1,342,581,000us-gaap_LongTermDebtNoncurrent	1,342,581,000us-gaap_LongTermDebtNoncurrent		$ 1,300,295,000us-gaap_LongTermDebtNoncurrent
Revolving credit facility and term loan facility
Long-Term Debt
Transaction costs	1,300,000
Ratio of total debt to EBITDA on occurrence of certain events	550.00%
Maximum total debt to EBITDA ratio required in period		5.5
Revolving credit facility and term loan facility \| Pro Forma
Long-Term Debt
Maximum total debt to EBITDA ratio required in period	5.25
Revolving credit facility and term loan facility \| Maximum
Long-Term Debt
Ratio of total debt to EBITDA	525.00%
Revolving credit facility due May 2018
Long-Term Debt
Increase in borrowing capacity			250,000,000
Maximum borrowing capacity			900,000,000
Long-term debt	502,000,000	502,000,000		460,000,000
Undrawn capacity under revolving credit facility	398,000,000	398,000,000
Available borrowings under revolving credit facility	354,700,000	354,700,000
Revolving credit facility due May 2018 \| Pro Forma
Long-Term Debt
Available borrowings under revolving credit facility	277,500,000	277,500,000
Term loan facility due May 2018
Long-Term Debt
Long-term debt	$ 150,000,000	150,000,000	$ 150,000,000	$ 150,000,000