Represents the percentage of operating surplus distributed to common, subordinated and general partner unitholders.

No definition available.

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Namespace Prefix:	exlp_
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- Definition

Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

+ Details

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

- Definition

Amount of cash distribution paid to unit-holder of limited partnership (LP).

+ References

+ Details

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

- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

+ References

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

+ References

+ Details

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- Details

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- Details

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Cash Distributions (Details) (USD $)	0 Months Ended							3 Months Ended		9 Months Ended
Cash Distributions (Details) (USD $)	Oct. 29, 2013	Aug. 14, 2013	May 15, 2013	Feb. 14, 2013	Nov. 14, 2012	Aug. 14, 2012	May 15, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)		$ 0.5225	$ 0.5175	$ 0.5125	$ 0.5075	$ 0.5025	$ 0.4975	$ 0.5225	$ 0.5025	$ 1.5525	$ 1.4925
Total Distribution		$ 27,900,000	$ 27,600,000	$ 23,300,000	$ 23,000,000	$ 22,800,000	$ 22,500,000			$ 78,856,000	$ 64,822,000
Cash distribution declared (in dollars per unit)	$ 0.5275
Cash distribution amount declared	$ 28,300,000
Common unitholders \| First order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										98.00%
Common unitholders \| Second order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										98.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.4025
Common unitholders \| Third order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										85.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.4375
Common unitholders \| Fourth order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										75.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.525
Common unitholders \| Thereafter order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										50.00%
General partner \| First order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										2.00%
General partner \| Second order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										2.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.4025
General partner \| Third order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										15.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.4375
General partner \| Fourth order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										25.00%
Summary of distributions per unit
Distribution per Limited Partner Unit (in dollars per unit)										$ 0.525
General partner \| Thereafter order of cash distribution
Cash Distributions
Percentage of operating surplus distributed to unitholders										50.00%