Intangible Assets - Total Favorable Lease Terms (Table) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
INTANGIBLE ASSETS [Abstract]
Favorable lease terms charter-out	$ (4,655)	$ (9,614)	$ (13,976)	$ (19,226)
Acceleration of favorable lease term	0	(3,205)	(22,063)	(3,205)
Total	$ (4,655)	$ (12,819)	$ (36,039)	$ (22,431)

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