XML 17 R6.htm IDEA: XBRL DOCUMENT v3.23.3

Consolidated Statements of Partners' Capital (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Allocation to unitholders	$ 2,936	$ 5,000	$ 6,700	$ 7,500	$ 7,500	$ 7,500
Limited Partner [Member]
Allocation to unitholders	2,900	4,900	6,500	7,400	7,400	7,400
General Partner [Member]
Allocation to unitholders	$ 100	$ 100	$ 100	$ 200	$ 200	$ 200

X

- Definition

Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Allocated to Preferred Unit Holders

+ References

No definition available.

+ Details

Name:	nrp_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHolders
Namespace Prefix:	nrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_LimitedPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: