DISTRIBUTIONS OF AVAILABLE CASH - Narrative (Details)	12 Months Ended
Dec. 31, 2016 shares
Distribution Made to Member or Limited Partner
Percentage of available cash distributed	100.00%
Period following quarter end for distribution of available cash	50 days
ARLP
Distribution Made to Member or Limited Partner
Subsidiaries general partner interest percentage	1.98%
Units owned by parent	31,088,338
Common units percentage	41.80%
MGP
Distribution Made to Member or Limited Partner
Subsidiaries holding percentage	100.00%
Alliance Coal
Distribution Made to Member or Limited Partner
Subsidiaries holding percentage	0.001%

The percentage of common units of the subsidiary held by the limited partnership.

No definition available.

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- Definition

Represents the percentage of available cash distributed to members or limited partners of an LLC or LP.

+ References

No definition available.

+ Details

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- Definition

Represents the period following each quarter end within which cash distributions are made to the members or limited partners of an LLC or LP.

+ References

No definition available.

+ Details

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- Definition

The percentage of the general partner interest in the subsidiary held by the limited partnership.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010

+ Details

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- Details

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- Details

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- Details

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