| Document and Entity Information | Feb. 01, 2021 |
| Document - Document and Entity Information | |
| Document Type | 8-K |
| Document Period End Date | Feb. 1, 2021 |
| Entity File Number | 0-26823 |
| Entity Registrant Name | ALLIANCE RESOURCE PARTNERS LP |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 73-1564280 |
| Entity Address, Address Line One | 1717 South Boulder Avenue |
| Entity Address, Adress Line Two | Suite 400 |
| Entity Address, State or Province | OK |
| Entity Address, City or Town | Tulsa |
| Entity Address, Postal Zip Code | 74119 |
| City Area Code | 918 |
| Local Phone Number | 295-7600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Units |
| Trading Symbol | ARLP |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001086600 |
| Amendment Flag | false |
