Intangible Assets - Amortization Expense (Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INTANGIBLE ASSETS [Abstract]
Favorable lease terms	$ (23,287)	$ (37,869)	$ (37,295)
Acceleration of favorable lease terms	(22,063)NMM_AccelerationIntangibleAssets	(3,205)NMM_AccelerationIntangibleAssets	0NMM_AccelerationIntangibleAssets
Total	$ (45,350)	$ (41,074)	$ (37,295)

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