Intangible Assets and Liabilities - Amortization of Favorable Lease Terms (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Favorable lease terms	$ (13,716)	$ (1,166)	$ (1,166)
Total	$ (13,716)	$ (1,166)	$ (1,166)

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