XML 107 R82.htm IDEA: XBRL DOCUMENT v3.20.4

PARTNERS' CAPITAL - Distributions (Details) - $ / shares	3 Months Ended									12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020
PARTNERS' CAPITAL
Period following quarter end for distribution of available cash										45 days
Quarterly distribution paid (in dollars per unit)	$ 0.400	$ 0.540	$ 0.540	$ 0.535	$ 0.530	$ 0.525	$ 0.520	$ 0.515	$ 0.510

X

- Definition

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

+ References

No definition available.

+ Details

Name:	arlp_DistributionMadeDistributionsPaidPerUnit
Namespace Prefix:	arlp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	arlp_DistributionsMadeToMemberOrLimitedPartnerPeriodForDistribution
Namespace Prefix:	arlp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_PartnersCapitalNotesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration