No definition available.

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- Definition

The price per unit of units sold in a public offering. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

No definition available.

+ Details

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- Definition

The number of units distributed to affiliates of the entity. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (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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- Definition

The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ 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 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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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

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_OwnershipAxis=ahgp_AllianceCoalMember
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ORGANIZATION AND PRESENTATION - IPO and Concurrent Transactions (Details) - $ / shares				12 Months Ended
	Jul. 28, 2017	Apr. 26, 2007	May 15, 2006	Dec. 31, 2017
MGP
Ownership interests
Subsidiaries holding percentage				100.00%
Alliance Coal
Ownership interests
Ownership percentage by general partners	0.001%			0.001%
ARLP
Ownership interests
Units owned by parent	87,188,338			87,188,338
IPO Concurrent Transactions \| MGP
Ownership interests
Subsidiaries holding percentage			100.00%
IPO Concurrent Transactions \| Alliance Coal
Ownership interests
Ownership percentage by general partners			0.001%
IPO Concurrent Transactions \| ARLP
Ownership interests
Units owned by parent			31,101,256
IPO Concurrent Transactions \| MGP \| Alliance Coal
Ownership interests
Ownership percentage by general partners		0.001%
Limited Partners' Capital
Ownership interests
Partnership units sold			12,500,000
Price of partnership units sold (in dollars per unit)			$ 25.00
Limited Partners' Capital \| IPO Concurrent Transactions \| AMH
Ownership interests
Units distributed to affiliates			6,863,470
Limited Partners' Capital \| IPO Concurrent Transactions \| AMH II
Ownership interests
Units distributed to affiliates			19,858,362
Limited Partners' Capital \| IPO Concurrent Transactions \| SGP
Ownership interests
Units distributed to affiliates			20,641,168