Borrowings - Loan Facilities Navios Holdings (Details)
$ in Thousands
 5 Months Ended 10 Months Ended 12 Months Ended
May 31, 2017
USD ($)
Nov. 03, 2017
USD ($)
Oct. 31, 2016
USD ($)
Oct. 31, 2010
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2010
USD ($)
Debt Instrument [Line Items]                
Gain/ (Loss) on bond and debt extinguishment         $ (981) $ 29,187 $ 0  
Repayment of debt         48,600      
Payments related to installments for the current year         25,707      
Payments related to installments for the next year         7,286      
(Repayment of)/proceeds from loan payable to affiliate company         $ (55,132) 50,000 $ 0  
Other long-term loans | Navios Logistics                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Oct. 29, 2009      
Maximum borrowing capacity         $ 817      
Repayment frequency         monthly      
Repayment installment         $ 6      
Amount outstanding         $ 253 321    
Fixed interest rate         6.00%      
Repayment terms         The loan facility bears interest at a fixed rate of 600 basis points. The loan is repayable in monthly installments of $6 each and the final repayment must occur prior to August 10, 2021.      
Navios Logistics Notes Payable                
Debt Instrument [Line Items]                
Maximum borrowing capacity         $ 41,964      
Repayment installments         16      
Repayment frequency         semi-annual      
Interest Rate         six-month LIBOR      
Debt finance costs         $ 5,949      
Navios Logistics BBVA Loan Facility                
Debt Instrument [Line Items]                
Maximum borrowing capacity         $ 25,000      
Loan margin percentage         3.25%      
Repayment installments         20      
Repayment frequency         quarterly      
Interest Rate         LIBOR (180 days) plus 325 basis points      
One of the secured credit facilities                
Debt Instrument [Line Items]                
Amount outstanding         $ 17,332      
Gain/ (Loss) on bond and debt extinguishment         1,715      
Repayment of debt         $ 15,607      
Loan Facility Credit Agricole Bank ($40,000) to finance the construction of one newbuilding Capesize vessel                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Sep. 30, 2010      
Maximum borrowing capacity         $ 40,000      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Balloon payment on the last repayment date         $ 6,810      
Amount outstanding         $ 17,674 18,880    
Maturity date         Aug. 31, 2021      
Loan Facility Credit Agricole Bank ($40,000) to finance the construction of one newbuilding Capesize vessel | First installment                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 2,411      
Loan Facility Credit Agricole Bank ($40,000) to finance the construction of one newbuilding Capesize vessel | From 2nd to 9th installment                
Debt Instrument [Line Items]                
Repayment installments         7      
Repayment frequency         semi-annual      
Repayment installment         $ 1,205      
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one Panamax vessel                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Aug. 31, 2011      
Maximum borrowing capacity         $ 23,000      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Balloon payment on the last repayment date         $ 7,264      
Amount outstanding         $ 14,074 14,755    
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one Panamax vessel | First installment                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 681      
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one Panamax vessel | From 2nd to 10th installment                
Debt Instrument [Line Items]                
Repayment installments         9      
Repayment frequency         semi-annual      
Repayment installment         $ 681      
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one newbuilding bulk carrier                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Dec. 31, 2011      
Maximum borrowing capacity         $ 23,000      
Loan margin percentage         3.25%      
Interest rate description         LIBOR plus 325 basis points      
Balloon payment on the last repayment date         $ 7,450      
Amount outstanding         $ 14,450 15,150    
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one newbuilding bulk carrier | First installment                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 700      
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one newbuilding bulk carrier | From 2nd to 10th installment                
Debt Instrument [Line Items]                
Repayment installments         9      
Repayment frequency         semi-annual      
Repayment installment         $ 700      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Dec. 20, 2013      
Maximum borrowing capacity         $ 22,500      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Amount outstanding         $ 15,188 16,313    
Number Of Loan Tranches         2      
Maturity date         Aug. 31, 2021      
Debt instrument collateral         1 bulk carrier      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | Tranche A                
Debt Instrument [Line Items]                
Balloon payment on the last repayment date         $ 2,812      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | Tranche B                
Debt Instrument [Line Items]                
Balloon payment on the last repayment date         $ 2,812      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | First installment | Tranche A                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 563      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | First installment | Tranche B                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 1,125      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | From 2nd to 8th installment | Tranche A                
Debt Instrument [Line Items]                
Repayment installments         7      
Repayment frequency         semi-annual      
Repayment installment         $ 563      
Loan Facility Credit Agricole ($22,500) to finance the acquisition of two Panamax Vessels | From 2nd to 8th installment | Tranche B                
Debt Instrument [Line Items]                
Repayment installments         7      
Repayment frequency         semi-annual      
Repayment installment         $ 563      
Commerzbank A.G. to finance acquisition of one Capesize vessel and construction of three Capesize vessels                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Jun. 30, 2009      
Maximum borrowing capacity         $ 240,000      
Amount outstanding         $ 0 19,857    
Number Of Loan Tranches         4      
Amount of each tranche         $ 60,000      
Number of the cancellated tranches               2
Commerzbank A.G. to finance acquisition of one Capesize vessel and construction of three Capesize vessels | Tranche A                
Debt Instrument [Line Items]                
Repayment of debt       $ 53,600        
Commerzbank A.G. to finance acquisition of one Capesize vessel and construction of three Capesize vessels | Tranche B                
Debt Instrument [Line Items]                
Repayment of debt       $ 54,500        
Commerzbank A.G. to finance acquisition of one Capesize vessel and construction of three Capesize vessels | Tranche C                
Debt Instrument [Line Items]                
Amount outstanding     $ 15,319          
Gain/ (Loss) on bond and debt extinguishment           1,517    
Repayment of debt     $ 13,802          
Commerzbank A.G. to finance acquisition of one Capesize vessel and construction of three Capesize vessels | Tranche D                
Debt Instrument [Line Items]                
Amount outstanding $ 17,322              
Gain/ (Loss) on bond and debt extinguishment         $ 1,715      
Repayment of debt $ 15,607              
HSH Nordbank A.G. ($15,300) to partially refinance the 4th tranche of the Commerzbank facility                
Debt Instrument [Line Items]                
Line of credit facility issuance date         May 23, 2017      
Maximum borrowing capacity         $ 15,300      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Repayment installments         15      
Repayment frequency         quarterly      
Repayment installment         $ 383      
Balloon payment on the last repayment date         $ 8,798      
Loan Facility DVB Bank SE ($72,000)                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Mar. 23, 2012      
Maximum borrowing capacity         $ 42,000      
Amount outstanding         $ 50,140 54,540    
Number Of Loan Tranches         2      
Loan Facility DVB Bank SE ($72,000) | Tranche A                
Debt Instrument [Line Items]                
Loan margin percentage         2.85%      
Interest rate description         LIBOR plus 285 basis points      
Repayment installments         9      
Repayment frequency         quarterly      
Repayment installment         $ 362      
Balloon payment on the last repayment date         14,400      
Amount of each tranche         $ 26,000      
Loan Facility DVB Bank SE ($72,000) | Tranche B                
Debt Instrument [Line Items]                
Loan margin percentage         3.60%      
Interest rate description         LIBOR plus 360 basis points      
Repayment installments         10      
Repayment frequency         quarterly      
Repayment installment         $ 269      
Balloon payment on the last repayment date         6,354      
Amount of each tranche         $ 16,000      
Loan Facility DVB Bank SE ($72,000) | New Tranche June 2014                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Jun. 27, 2014      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Repayment installments         10      
Repayment frequency         quarterly      
Repayment installment         $ 469      
Balloon payment on the last repayment date         18,750      
Amount of each tranche         $ 30,000      
Loan Facility DVB Bank SE ($40,000) to finance the acquisition of four Panamax vessels                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Sep. 30, 2013      
Maximum borrowing capacity         $ 40,000      
Loan margin percentage         3.25%      
Interest rate description         LIBOR plus 325 basis points      
Repayment installments         15      
Repayment frequency         quarterly      
Repayment installment         $ 730      
Balloon payment on the last repayment date         7,302      
Amount outstanding         $ 18,254 28,000    
Maturity date         Sep. 30, 2021      
Debt instrument collateral         1 newbuilding Panamax and 1 newbuilding Capesize vessel      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Jan. 31, 2016      
Maximum borrowing capacity         $ 41,000      
Loan margin percentage         2.55%      
Interest rate description         LIBOR plus 255 basis points      
Amount outstanding         $ 33,816 37,293    
Number Of Loan Tranches         2      
Amount drawn down           39,900    
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | Tranche A                
Debt Instrument [Line Items]                
Balloon payment on the last repayment date         $ 14,760      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | Tranche B                
Debt Instrument [Line Items]                
Balloon payment on the last repayment date         $ 8,764      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | First installment | Tranche A                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 492      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | First installment | Tranche B                
Debt Instrument [Line Items]                
Repayment installments         1      
Repayment frequency         quarterly      
Repayment installment         $ 377      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | From 2nd to 17th installment | Tranche A                
Debt Instrument [Line Items]                
Repayment installments         16      
Repayment frequency         quarterly      
Repayment installment         $ 369      
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of one newbuilding Panamax vessel and one newbuilding Capesize vessel | From 2nd to 17th installment | Tranche B                
Debt Instrument [Line Items]                
Repayment installments         16      
Repayment frequency         quarterly      
Repayment installment         $ 220      
Alpha Bank A.E. ($31,000) to finance part of the acquisition of a Capesize vessel                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Nov. 06, 2014      
Maximum borrowing capacity         $ 31,000      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Repayment installments         20      
Repayment frequency         quarterly      
Repayment installment         $ 450      
Balloon payment on the last repayment date         16,600      
Amount outstanding         $ 25,600 27,400    
Alpha Bank A.E. ($16,125) to refinance one Capesize vessel                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Nov. 03, 2016      
Maximum borrowing capacity         $ 16,125      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Balloon payment on the last repayment date         $ 10,725      
Amount outstanding         $ 16,125 16,125    
Alpha Bank A.E. ($16,125) to refinance one Capesize vessel | First 4 installments                
Debt Instrument [Line Items]                
Repayment installments         4      
Repayment frequency         quarterly      
Repayment installment         $ 250      
Alpha Bank A.E. ($16,125) to refinance one Capesize vessel | From 5th to 21rst installments                
Debt Instrument [Line Items]                
Repayment installments         16      
Repayment frequency         quarterly      
Repayment installment         $ 275      
Navios Acquisition Loan                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Sep. 19, 2016      
Maximum borrowing capacity         $ 70,000      
Amount outstanding         $ 0 51,240    
(Repayment of)/proceeds from loan payable to affiliate company   $ (55,132)       $ 50,000    
Accrued interest   $ 5,132