Borrowings - Loan Facilities Navios Holdings (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]          
Amount outstanding   $ 1,612,718 $ 1,581,756    
Gain/ (Loss) on bond and debt extinguishment   7,047 47,430 $ 6,464  
(Repayment of)/proceeds from loan payable to affiliate company   $ (50,000) (13,420) 0  
Redemption price percentage   110.75%      
Proceeds from long-term loans   $ 81,625 129,022 56,919  
Accrued interest   55,650 35,926    
Sale and leaseback transaction, net proceeds financing activities   $ 66,862      
Construction of six liquid barges          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Dec. 31, 2020      
Maximum borrowing capacity   $ 13,475      
Number of loan tranches   6      
Number of vessels financed   6      
Number of repayment installments   20      
Repayment frequency   quarterly      
Amount outstanding   $ 11,047      
Fixed interest rate   8.50%      
Proceeds from Debt, Net of Issuance Costs   $ 11,229      
Interest Expense Debt   $ 176      
2024 Notes          
Debt Instrument [Line Items]          
Redemption price percentage   100.00%      
Secured debt          
Debt Instrument [Line Items]          
Repayments Of Secured Debt   $ 28,582      
NSM Loan          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Aug. 29, 2019      
Amount outstanding   $ 78,901 130,538    
Face amount at issuance date   141,795      
Repayment of loan payable to affiliate companies   50,000 13,420    
Accrued interest   526      
Two Navios Containers' credit facilities          
Debt Instrument [Line Items]          
Repayments Of Secured Debt   $ 38,556      
$50.0 million NSM Loan          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Jun. 30, 2020      
Number of repayment installments   18      
Amount outstanding   $ 50,326 0    
Face amount at issuance date   50,000      
Accrued interest   $ 326      
Navios Logistics Term Loan B Facility | Navios Logistics          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Nov. 03, 2017      
Interest rate   LIBOR plus 475 basis points      
Loan margin percentage   4.75%      
Amount outstanding   $ 0 98,000    
Face amount at issuance date   100,000      
Repayment of debt   97,500      
Gain/ (Loss) on bond and debt extinguishment   $ (1,496)      
Series H Depositary Shares | 2024 Notes          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Mar. 21, 2019      
Face amount at issuance date   $ 4,747      
Fixed interest rate   9.75%      
Number of shares repurchased | shares   10,930      
Series G Depositary Shares | 2024 Notes          
Debt Instrument [Line Items]          
Issuance date/Date of agreement   Apr. 21, 2019      
Face amount at issuance date   $ 3,879      
Number of shares repurchased | shares   8,841      
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      
Interest rate description   LIBOR plus 275 basis points      
Loan margin percentage   2.75%      
Amount outstanding       0  
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      
Interest rate description   LIBOR plus 275 basis points      
Loan margin percentage   2.75%      
Number of repayment installments   5      
Repayment frequency   semi-annual      
Repayment installment   $ 750      
Balloon payment on the last repayment date   8,850      
Amount outstanding   $ 11,100 12,600    
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      
Interest rate description   LIBOR plus 325 basis points      
Loan margin percentage   3.25%      
Number of repayment installments   3      
Repayment frequency   semi-annual      
Repayment installment   $ 750      
Balloon payment on the last repayment date   9,150      
Amount outstanding   $ 11,400 12,900    
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      
Interest rate description   LIBOR plus 300 basis points      
Loan margin percentage   3.00%      
Amount outstanding       0  
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      
Interest rate description   LIBOR plus 280 basis points      
Loan margin percentage   2.80%      
Amount outstanding     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      
Hamburg Commercial Bank AG ($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      
Interest rate description   LIBOR plus 300 basis points      
Loan margin percentage   3.00%      
Number of repayment installments   3      
Repayment frequency   quarterly      
Repayment installment   $ 383      
Balloon payment on the last repayment date   8,798      
Amount outstanding   $ 9,945 11,475    
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      
Interest rate description   LIBOR plus 293 basis points      
Loan margin percentage   2.93%      
Amount outstanding   $ 4,504 41,073    
Maturity date   Jun. 30, 2021      
Repayment of debt   $ 33,003      
Loan Facility DVB Bank SE ($72,000) | Tranche A          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 26,000      
Number of vessels financed   1      
Loan Facility DVB Bank SE ($72,000) | Tranche B          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 16,000      
Number of vessels financed   1      
Number of repayment installments   2      
Repayment frequency   quarterly      
Repayment installment   $ 268      
Balloon payment on the last repayment date   $ 3,968      
Loan Facility DVB Bank SE ($72,000) | New Tranche June 2014          
Debt Instrument [Line Items]          
Line of credit facility issuance date   Jun. 27, 2014      
Maximum borrowing capacity   $ 30,000      
Number of vessels financed   1      
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      
Interest rate description   LIBOR plus 325 basis points      
Loan margin percentage   3.25%      
Amount outstanding   $ 0 5,556    
Maturity date   Sep. 30, 2021      
Repayment of debt $ 5,556        
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      
Interest rate description   LIBOR plus 255 basis points      
Loan margin percentage   2.55%      
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      
Interest rate description   LIBOR plus 300 basis points      
Loan margin percentage   3.00%      
Number of repayment installments   8      
Repayment frequency   quarterly      
Repayment installment   $ 450      
Balloon payment on the last repayment date   16,600      
Amount outstanding   $ 20,200 22,000    
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      
Interest rate description   LIBOR plus 300 basis points      
Loan margin percentage   3.00%      
Number of repayment installments   8      
Repayment frequency   quarterly      
Repayment installment   $ 275      
Balloon payment on the last repayment date   10,725      
Amount outstanding   12,925 14,025    
Sale and Leaseback Agreements          
Debt Instrument [Line Items]          
Amount outstanding   62,934 $ 0    
Finance lease liability   $ 68,000      
Number of repayment installments   144      
Sale and Leaseback Agreements | Capesize Vessel A          
Debt Instrument [Line Items]          
Sale and leaseback transaction, monthly rental payments   $ 224      
Finance Lease Liability, Maturity Date   Dec. 31, 2031      
Finance Lease Liability Periodic Payment Terms Balloon Payment To Be Paid   $ 750      
Sale and Leaseback Agreements | Capesize Vessel B          
Debt Instrument [Line Items]          
Sale and leaseback transaction, monthly rental payments   $ 238      
Finance Lease Liability, Maturity Date   Mar. 31, 2032      
Finance Lease Liability Periodic Payment Terms Balloon Payment To Be Paid   $ 750