The element refers to the expected date of delivery of vessels, bareboats and other significant assets.

No definition available.

Name:	nmm_DateExpectedDelivery
Namespace Prefix:	nmm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of vessels.

+ References

No definition available.

+ Details

Name:	nmm_NumberOfVessels
Namespace Prefix:	nmm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The vessels' capacity in deadweight tonnage (DWT).

+ References

No definition available.

+ Details

Name:	nmm_VesselCapacity
Namespace Prefix:	nmm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The vessels' capacity in Twenty- foot Equivalent Unit (TEU).

+ References

No definition available.

+ Details

Name:	nmm_VesselCapacityInTEU
Namespace Prefix:	nmm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The year that the vessel was built.

+ References

No definition available.

+ Details

Name:	nmm_VesselYearBuilt
Namespace Prefix:	nmm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Vessels chartered-out additional period.

+ References

No definition available.

+ Details

Name:	nmm_VesselsChartered-OutAdditionalPeriod
Namespace Prefix:	nmm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Vessels chartered-out additional year, net per day.

+ References

No definition available.

+ Details

Name:	nmm_VesselsChartered-OutAdditionalYearNetPerDay
Namespace Prefix:	nmm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Vessels chartered-out, net per day.

+ References

No definition available.

+ Details

Name:	nmm_VesselsChartered-OutNetPerDay
Namespace Prefix:	nmm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Vessels chartered-out period.

+ References

No definition available.

+ Details

Name:	nmm_VesselsChartered-OutPeriod
Namespace Prefix:	nmm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 360
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478451/942-360-50-1

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorPropertyClassAxis=nmm_TwoThousandFiveBuiltPanamaxVesselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorPropertyClassAxis=nmm_TwoThousandSevenBuiltMR2ProductTankerVesselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_FourTEUNewbuildingMethanol-ReadyAndScrubber-FittedContainershipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=nmm_VesselsDeliveredPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=nmm_VesselsDeliveredPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details Narrative)		1 Months Ended	3 Months Ended		6 Months Ended
Subsequent Events (Details Narrative)	Sep. 08, 2025 USD ($) Vessel Capacity	Aug. 31, 2025 USD ($) Capacity	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) Capacity	Jun. 30, 2024 USD ($) Capacity	Dec. 31, 2024 USD ($)
Subsequent Event [Line Items]
Vessel year built					2025	2024
Vessel capacity in DWT \| Capacity					7,700	5,300
Aggregate gross sale price			$ 4,552,275,000		$ 4,552,275,000		$ 4,241,292,000
Aggregate gross sale proceeds					33,717,000	$ 91,400,000
Aggregate gain on sale of vessels			$ 5,601,000	$ 7,256,000	$ (329,000)	$ 9,133,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate gross sale price		$ 22,550,000
Aggregate gain on sale of vessels		$ 20,891,000
Subsequent Event [Member] \| 2005-built Panamax [Member]
Subsequent Event [Line Items]
Vessel year built		2005
Vessel capacity in DWT \| Capacity		75,397
Subsequent Event [Member] \| 2007-built MR2 Product Tanker Vessel [Member]
Subsequent Event [Line Items]
Vessel year built		2007
Vessel capacity in DWT \| Capacity		50,922
Four TEU Newbuilding Methanol-ready And Scrubber-fitted Containerships [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vessel capacity in TEU \| Capacity	8,850
Property, Plant and Equipment, Additions	$ 115,095,000
Number of vessels \| Vessel	4
Vessels chartered-out, net per day	$ 44,100
Vessels chartered-out period	5 years 2 months 12 days
Vessels chartered-out additional period	1 year
Vessels chartered-out additional year, net per day	$ 41,600
Four TEU Newbuilding Methanol-ready And Scrubber-fitted Containerships [Member] \| Subsequent Event [Member] \| Vessels Delivered Period One [Member]
Subsequent Event [Line Items]
Date of expected delivery of vessel	second half of 2027
Four TEU Newbuilding Methanol-ready And Scrubber-fitted Containerships [Member] \| Subsequent Event [Member] \| Vessels Delivered Period Two [Member]
Subsequent Event [Line Items]
Date of expected delivery of vessel	first quarter of 2028