ORGANIZATION AND PRESENTATION (Details)		6 Months Ended
Jun. 16, 2014 shares	Jun. 30, 2015 shares
Ownership interests
Ownership percentage by limited partners		100.00%
ARLP
Ownership interests
Unit split ratio	2
Units issued due to split	37,000,000
Additional units issued to parent	15,544,169
Total units owned by parent	31,088,338	31,088,338
ARLP \| SGP
Ownership interests
Ownership percentage by noncontrolling owners		0.01%
MGP
Ownership interests
Subsidiaries holding percentage		100.00%
Intermediate Partnership \| SGP
Ownership interests
Ownership percentage by noncontrolling owners		0.01%

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- Definition

Represents the number of additional units issued to parent under the unit split by the limited partnership.

+ References

No definition available.

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Change in the number of units for each class of partners' capital accounts during the year due to unit split. Partners include general, limited and preferred partners.

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Represents the number of units held in the subsidiary by the limited partnership.

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The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

Reference 1: 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

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 4

-Subparagraph (SAB TOPIC 4.C)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Stock Split

-URI http://asc.fasb.org/extlink&oid=6525746

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

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