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INTANGIBLE ASSETS (Details)	Jun. 30, 2013
INTANGIBLE ASSETS [Abstract]
Weighted average useful life of favorable lease terms charter-out	7.7

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- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	NMM_WeightedAverageUsefulLifeOfFavorableLeaseTermsCharterOut
Namespace Prefix:	NMM_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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