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 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 type of vessel.

+ References

No definition available.

+ Details

Name:	nmm_VesselType
Namespace Prefix:	nmm_
Data Type:	xbrli:stringItemType
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

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

Name:	srt_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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 increase (decrease) during the reporting period in monies given as security or collateral for items acquired or borrowed on a temporary basis. Deposits may also be paid as initial payment of the cost of acquisition or for the right to enter into a contract or agreement.

+ References

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

+ Details

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

- Definition

Description of lessee's operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=nmm_InitialCommonUnitRepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=nmm_NewCommonUnitRepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=nmm_AggregateCommonUnitRepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_TwoThousandEightBuiltVesselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_TwoThousandNineBuiltVesselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_TwoThousandNineAndTwoThousandEightBuiltVesselMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_NaveAnthosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_NewbuildingScrubber-FittedVLCCTankerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nmm_JapaneseNewbuildingScrubber-FittedCapesizeVesselMember
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)	Aug. 27, 2026 USD ($) Capacity	Jul. 31, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Sep. 30, 2026 USD ($)	Aug. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Subsequent Event [Line Items]
Property, Plant and Equipment, Net			$ 4,575,031,000		$ 4,575,031,000				$ 4,389,868,000
Aggregate gain on sale of vessels			$ 32,952,000	$ 5,601,000	$ 41,536,000	$ (329,000)
Forecast [Member] \| Initial Common Unit Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount								$ 100,000,000
Forecast [Member] \| Maximum [Member] \| New Common Unit Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount							$ 200,000,000
Forecast [Member] \| Maximum [Member] \| Aggregate Common Unit Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount								$ 207,381,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate gain on sale of vessels	$ 47,222,000
2008-built [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vessel year built	2008
Vessel type	containership
Vessel capacity in TEU \| Capacity	4,730
Date of expected delivery of vessel	second half of 2027
2009-built [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vessel year built	2009
Vessel type	capesize
Vessel capacity in DWT \| Capacity	180,727
Date of expected delivery of vessel	second half of 2026
2008-2029 built [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Property, Plant and Equipment, Net	$ 65,250,000
Nave Anthos [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vessel year built	2026
Vessel type	Aframax/LR2
Vessel capacity in DWT \| Capacity	117,012
Newbuilding Scrubber-fitted VLCC Tanker [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Date of expected delivery of vessel		second half of 2029
Additions		$ 120,500,000
Japanese Newbuilding Scrubber-fitted Capesize Vessel [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Date of expected delivery of vessel		second half of 2029
Bareboat-in contract term		ten-year
Deposits for acquisition/ option to acquire vessel		$ (5,500,000)