Intangible Assets and Liabilities - Amortization of Favorable Lease Terms (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization	$ (1,550)	$ (4,220)	$ (3,100)	$ (8,660)
Total	$ (1,550)	$ (4,220)	$ (3,100)	$ (8,660)

The aggregate amortization of the asset/liability arising from the market value of the time charter chartered-out assumed from a vessel acquisition net of any acceleration of intangibles.

No definition available.

Name:	nmm_AmortizationOfFairValueOfIntangibleAssets
Namespace Prefix:	nmm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration