| Document And Entity Information | Nov. 03, 2022 |
| Document Information [Line Items] | |
| Entity, Registrant Name | NATURAL RESOURCE PARTNERS LP |
| Document, Type | 8-K |
| Document, Period End Date | Nov. 03, 2022 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-31465 |
| Entity, Tax Identification Number | 35-2164875 |
| Entity, Address, Address Line One | 1415 Louisiana Street, |
| Entity, Address, Address Line Two | Suite 2400 |
| Entity, Address, City or Town | Houston |
| Entity, Address, State or Province | TX |
| Entity, Address, Postal Zip Code | 77002 |
| City Area Code | 713 |
| Local Phone Number | 751-7507 |
| Title of 12(b) Security | Common Units representing limited partner interests |
| Trading Symbol | NRP |
| Security Exchange Name | NYSE |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001171486 |
