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, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2010
Debt Instrument [Line Items]                
Repayment of debt         $ 94,298      
Gain/ (Loss) on bond and debt extinguishment         6,464 $ (981) $ 29,187  
Payments related to installments for the current year         39,969      
Payments related to installments for the next year         54,329      
(Repayment of)/proceeds from loan payable to affiliate company         $ 0 (55,132) 50,000  
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         $ 184 253    
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      
Number of repayment installments         16      
Repayment frequency         semi-annual      
Interest rate         six-month LIBOR      
Debt finance costs         $ 5,949      
Loan Facility Credit Agricole ($40,000) to partially 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      
Number of vessels partially financed         1      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Amount outstanding         $ 0 17,674    
Maturity date         Aug. 31, 2021      
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      
Number of vessels partially financed         1      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Balloon payment on the last repayment date         $ 7,264      
Amount outstanding         $ 12,031 14,074    
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one Panamax vessel | First installment                
Debt Instrument [Line Items]                
Number of 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 7th installment                
Debt Instrument [Line Items]                
Number of repayment installments         6      
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      
Number of vessels partially financed         1      
Loan margin percentage         3.25%      
Interest rate description         LIBOR plus 325 basis points      
Balloon payment on the last repayment date         $ 7,450      
Amount outstanding         $ 12,350 14,450    
Loan Facility Credit Agricole ($23,000) to partially finance the construction of one newbuilding bulk carrier | First installment                
Debt Instrument [Line Items]                
Number of 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 7th installment                
Debt Instrument [Line Items]                
Number of repayment installments         6      
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      
Number of loan tranches         2      
Number of vessels financed         2      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Amount outstanding         $ 0 15,188    
Maturity date         Aug. 31, 2021      
Loan Facility Credit Agricole ($28,745) to repay all amounts outstanding under the facility agreement dated September 2010 and to repay all amounts outstanding under the facility agreement dated December 20, 2013                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Feb. 14, 2018      
Maximum borrowing capacity         $ 28,745      
Number of loan tranches         3      
Loan margin percentage         2.80%      
Interest rate description         LIBOR plus 280 basis points      
Amount outstanding         $ 26,415 0    
Loan Facility Credit Agricole ($28,745) to repay all amounts outstanding under the facility agreement dated September 2010 and to repay all amounts outstanding under the facility agreement dated December 20, 2013 | Tranche A                
Debt Instrument [Line Items]                
Amount drawn down         $ 15,245      
Number of repayment installments         6      
Repayment frequency         semi-annual      
Repayment installment         $ 1,205      
Balloon payment on the last repayment date         6,810      
Loan Facility Credit Agricole ($28,745) to repay all amounts outstanding under the facility agreement dated September 2010 and to repay all amounts outstanding under the facility agreement dated December 20, 2013 | Tranche B                
Debt Instrument [Line Items]                
Amount drawn down         $ 6,750      
Number of repayment installments         6      
Repayment frequency         semi-annual      
Repayment installment         $ 563      
Balloon payment on the last repayment date         2,813      
Loan Facility Credit Agricole ($28,745) to repay all amounts outstanding under the facility agreement dated September 2010 and to repay all amounts outstanding under the facility agreement dated December 20, 2013 | New Tranche June 2014                
Debt Instrument [Line Items]                
Amount drawn down         $ 6,750      
Number of repayment installments         6      
Repayment frequency         semi-annual      
Repayment installment         $ 563      
Balloon payment on the last repayment date         $ 2,813      
Commerzbank A.G. to partially finance the acquisition of one Capesize vessel and the construction of three Capesize vessels                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Jun. 30, 2009      
Maximum borrowing capacity         $ 240,000      
Number of loan tranches         4      
Number of vessels financed         3      
Number of vessels partially financed         1      
Amount of each tranche         $ 60,000      
Number of the cancellated tranches               2
Commerzbank A.G. to partially finance the acquisition of one Capesize vessel and the construction of three Capesize vessels | Tranche A                
Debt Instrument [Line Items]                
Repayment of debt       $ 53,600        
Commerzbank A.G. to partially finance the acquisition of one Capesize vessel and the construction of three Capesize vessels | Tranche B                
Debt Instrument [Line Items]                
Repayment of debt       $ 54,500        
Commerzbank A.G. to partially finance the acquisition of one Capesize vessel and the construction of three Capesize vessels | Tranche C                
Debt Instrument [Line Items]                
Amount outstanding     $ 15,319          
Repayment of debt     13,802          
Gain/ (Loss) on bond and debt extinguishment     $ 1,517          
Commerzbank A.G. to partially finance the acquisition of one Capesize vessel and the construction of three Capesize vessels | Tranche D                
Debt Instrument [Line Items]                
Amount outstanding $ 17,322              
Repayment of debt 15,607              
Gain/ (Loss) on bond and debt extinguishment $ 1,715              
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      
Number of repayment installments         11      
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      
Number of loan tranches         2      
Amount outstanding         $ 45,741 50,140    
Loan Facility DVB Bank SE ($72,000) | Tranche A                
Debt Instrument [Line Items]                
Number of vessels financed         1      
Amount of each tranche         $ 26,000      
Loan margin percentage         2.85%      
Interest rate description         LIBOR plus 285 basis points      
Number of repayment installments         5      
Repayment frequency         quarterly      
Repayment installment         $ 363      
Balloon payment on the last repayment date         $ 14,400      
Loan Facility DVB Bank SE ($72,000) | Tranche B                
Debt Instrument [Line Items]                
Number of vessels financed         1      
Amount of each tranche         $ 16,000      
Loan margin percentage         3.60%      
Interest rate description         LIBOR plus 360 basis points      
Number of repayment installments         6      
Repayment frequency         quarterly      
Repayment installment         $ 269      
Balloon payment on the last repayment date         $ 6,354      
Loan Facility DVB Bank SE ($72,000) | New Tranche June 2014                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Jun. 27, 2014      
Number of vessels financed         1      
Amount of each tranche         $ 30,000      
Loan margin percentage         2.75%      
Interest rate description         LIBOR plus 275 basis points      
Number of repayment installments         6      
Repayment frequency         quarterly      
Repayment installment         $ 469      
Balloon payment on the last repayment date         $ 18,750      
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      
Number of vessels financed         4      
Loan margin percentage         3.25%      
Interest rate description         LIBOR plus 325 basis points      
Number of repayment installments         11      
Repayment frequency         quarterly      
Repayment installment         $ 730      
Balloon payment on the last repayment date         7,302      
Amount outstanding         $ 15,333 18,254    
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      
Number of loan tranches         2      
Number of vessels financed         2      
Loan margin percentage         2.55%      
Interest rate description         LIBOR plus 255 basis points      
Amount outstanding         $ 0 33,816    
Amount drawn down             39,900  
Repayment of debt         $ 31,769      
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      
Number of vessels partially financed         1      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Number of repayment installments         16      
Repayment frequency         quarterly      
Repayment installment         $ 450      
Balloon payment on the last repayment date         16,600      
Amount outstanding         $ 23,800 25,600    
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      
Number of vessels financed         1      
Loan margin percentage         3.00%      
Interest rate description         LIBOR plus 300 basis points      
Number of repayment installments         16      
Repayment frequency         quarterly      
Repayment installment         $ 275      
Balloon payment on the last repayment date         10,725      
Amount outstanding         $ 15,125 $ 16,125    
Navios Acquisition Loan                
Debt Instrument [Line Items]                
Line of credit facility issuance date         Sep. 19, 2016      
Maximum borrowing capacity         $ 70,000      
(Repayment of)/proceeds from loan payable to affiliate company   $ (55,132)         $ 50,000  
Accrued interest   $ 5,132