Date the finance lease liability terminates, in CCYY-MM-DD format.

No definition available.

Name:	NMM_FinanceLeaseLiabilityMaturityDate
Namespace Prefix:	NMM_
Data Type:	xbrli:dateItemType
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 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

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of the monthly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77913982&loc=d3e50796-112755

+ Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=NMM_FinancialLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=NMM_ConsecutiveAverageMonthlyInstallmentsEqual69Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=NMM_ConsecutiveAverageMonthlyInstallmentsEqual60Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=NMM_ConsecutiveAverageMonthlyInstallmentsEqual120Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=NMM_ConsecutiveAverageMonthlyInstallmentsEqual36Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=NMM_ConsecutiveAverageMonthlyInstallmentsEqual132Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=NMM_MaturityDateOption1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=NMM_MaturityDateOption2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Borrowings - Financial Liabilities (Details) $ in Thousands	3 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
Borrowings - Financial Liabilities (Details) $ in Thousands	Apr. 11, 2019 USD ($)	Jun. 28, 2019 USD ($)	Jul. 24, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 02, 2019 USD ($)	Jul. 02, 2019 USD ($)	Jun. 07, 2019 USD ($)	Apr. 05, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 10, 2018 USD ($)
Debt Instrument [Line Items]
Financial liability				$ 90,086					$ 24,842
Navios Sol
Debt Instrument [Line Items]
Financial liability				$ 19,193				$ 20,000
Vessel capacity in DWT				180,274
Vessel year built				2009
Vessel type				Capesize
Amount drawn down	$ 20,000
Purchase Obligation				$ 6,300
Navios Sagittarius
Debt Instrument [Line Items]
Financial liability				$ 6,505			$ 7,500
Vessel capacity in DWT				75,756
Vessel year built				2006
Vessel type				Panamax
Amount drawn down		$ 7,500
Purchase Obligation				$ 2,000
Navios Ace
Debt Instrument [Line Items]
Financial liability				$ 21,456		$ 22,000
Vessel capacity in DWT				179,016
Vessel year built				2011
Vessel type				Capesize
Amount drawn down			$ 22,000
Purchase Obligation				$ 6,300
Financial Liabilities \| Navios Fantastiks and Navios Beaufiks
Debt Instrument [Line Items]
Financial liability				22,897						$ 25,000
Purchase Obligation				6,300
Financial Liabilities \| Navios Fantastiks and Navios Beaufiks \| 69 consecutive monthly payments
Debt Instrument [Line Items]
Sale Lease back Transaction Monthly Rental Payments				$ 161
Finance Lease Liability, Maturity Date				Sep. 30, 2024
Financial Liabilities \| Navios Fantastiks and Navios Beaufiks \| 60 consecutive monthly payments
Debt Instrument [Line Items]
Sale Lease back Transaction Monthly Rental Payments				$ 155
Finance Lease Liability, Maturity Date				Dec. 31, 2023
Financial Liabilities \| Navios Sol \| 120 consecutive monthly payments
Debt Instrument [Line Items]
Sale Lease back Transaction Monthly Rental Payments				$ 190
Finance Lease Liability, Maturity Date				Jun. 30, 2029
Financial Liabilities \| Navios Sagittarius \| 36 consecutive monthly payments
Debt Instrument [Line Items]
Sale Lease back Transaction Monthly Rental Payments				$ 178
Finance Lease Liability, Maturity Date				Jun. 30, 2022
Financial Liabilities \| Navios Ace \| 132 consecutive monthly payments
Debt Instrument [Line Items]
Sale Lease back Transaction Monthly Rental Payments				$ 198
Finance Lease Liability, Maturity Date				Sep. 30, 2030
Financial Liabilities \| Five containerships acquired upon the liquidation of Navios Europe I
Debt Instrument [Line Items]
Financial liability					$ 25,508
Debt instrument term				5 years
Interest rate description				LIBOR plus 365 bps
Interest rate percentage				3.65%
Financial Liabilities \| Five containerships acquired upon the liquidation of Navios Europe I \| First maturity date
Debt Instrument [Line Items]
Finance Lease Liability, Maturity Date				Apr. 30, 2024
Financial Liabilities \| Five containerships acquired upon the liquidation of Navios Europe I \| Second maturity date
Debt Instrument [Line Items]
Finance Lease Liability, Maturity Date				Apr. 30, 2025