XML 86 R61.htm IDEA: XBRL DOCUMENT v3.20.4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Advance Royalties (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Advance Royalties
Advance royalties, net, affiliates	$ 48,389	$ 41,216
Advance royalties, net, third-parties	12,570	12,685
Total advance royalties, net	$ 60,959	$ 53,901

X

- Definition

Carrying amount as of the balance sheet date of capitalized amounts paid for mineral royalties.

+ References

No definition available.

+ Details

Name:	arlp_PrepaidMineralRoyaltiesCurrentAndNoncurrent
Namespace Prefix:	arlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Carrying amount as of the balance sheet date of capitalized amounts paid to affiliates for mineral royalties.

+ References

No definition available.

+ Details

Name:	arlp_PrepaidMineralRoyaltiesCurrentAndNoncurrentAffiliates
Namespace Prefix:	arlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Carrying amount as of the balance sheet date of capitalized amounts paid to third parties for mineral royalties.

+ References

No definition available.

+ Details

Name:	arlp_PrepaidMineralRoyaltiesCurrentAndNoncurrentThirdParties
Namespace Prefix:	arlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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