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SEGMENT INFORMATION - General (Details)	6 Months Ended
	Jun. 30, 2024 segment
SEGMENT INFORMATION
Number of reportable segments	4
Number Of Coal Reportable Segments	2
Number Of Mining Complex	7
Percentage of coal sold by coal operations' mines leased from coal royalties entities	63.00%

X

- Definition

Number of coal reportable segments.

+ References

No definition available.

+ Details

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Namespace Prefix:	arlp_
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- Definition

Number of mining complex.

+ References

No definition available.

+ Details

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Namespace Prefix:	arlp_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Represents the percentage of coal sold by coal operations' mines leased from Coal Royalties entities.

+ References

No definition available.

+ Details

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Namespace Prefix:	arlp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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- References

No definition available.

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