Borrowings - Senior and Ship Mortgage Notes Navios Holdings and Navios Logistics (Details)
€ in Thousands, $ in Thousands
9 Months Ended 10 Months Ended 11 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Oct. 31, 2016
USD ($)
Nov. 29, 2013
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2018
EUR (€)
Debt Instrument [Line Items]              
Gain/ (Loss) on bond and debt extinguishment       $ 6,464 $ (981) $ 29,187  
Restricted cash       12,892 $ 6,558 $ 5,386  
2022 Senior Secured Notes              
Debt Instrument [Line Items]              
Face amount at issuance date       $ 305,000      
Issuance date/Date of agreement       Nov. 21, 2017      
Debt instrument, issuance price percentage       97.00%      
Fixed interest rate       11.25%     11.25%
Gain/ (Loss) on bond and debt extinguishment       $ (2,695)      
2022 Senior Secured Notes | On or after November 21, 2017              
Debt Instrument [Line Items]              
Redemption price percentage       108.438%      
Senior Notes due 2019              
Debt Instrument [Line Items]              
Face amount at issuance date       $ 350,000      
Issuance date/Date of agreement       Jan. 28, 2011      
Fixed interest rate       8.125%     8.125%
Repurchase of notes   $ 58,906          
Repurchase of senior notes - cash consideration   30,671          
Gain/ (Loss) on bond and debt extinguishment   $ 27,670          
2022 Notes              
Debt Instrument [Line Items]              
Face amount at issuance date       $ 650,000      
Issuance date/Date of agreement       Nov. 29, 2013      
Fixed interest rate       7.375%     7.375%
Repurchase of notes $ 35,661            
Repurchase of senior notes - cash consideration 28,796            
Gain/ (Loss) on bond and debt extinguishment $ 6,464            
Restricted cash       $ 7,000      
Debt Instrument Collateral     23 dry bulk vessels        
2022 Notes | On or after January 15, 2017              
Debt Instrument [Line Items]              
Redemption price percentage       105.531%      
2022 Notes | Upon occurrence of certain change of control events              
Debt Instrument [Line Items]              
Redemption price percentage       101.00%      
2022 Logistics Senior Notes | Navios Logistics              
Debt Instrument [Line Items]              
Face amount at issuance date       $ 375,000      
Issuance date/Date of agreement       Apr. 22, 2014      
Fixed interest rate       7.25%     7.25%
Maturity date       May 01, 2022      
2022 Logistics Senior Notes | Navios Logistics | On or after May 1, 2017              
Debt Instrument [Line Items]              
Redemption price percentage       105.438%      
2022 Logistics Senior Notes | Navios Logistics | Upon occurrence of certain change of control events              
Debt Instrument [Line Items]              
Redemption price percentage       101.00%      
Navios Logistics BBVA Loan Facility              
Debt Instrument [Line Items]              
Issuance date/Date of agreement       Dec. 15, 2016      
Line of credit facility maximum borrowing capacity       $ 25,000      
Loan margin percentage       3.25%      
Interest rate       LIBOR (180 days) plus 325 basis points      
Number of repayment installments       20      
Repayment frequency       quarterly      
Navios Logistics Alpha Bank Loan              
Debt Instrument [Line Items]              
Issuance date/Date of agreement       May 18, 2017      
Line of credit facility maximum borrowing capacity       $ 14,000      
Number of vessels financed       2     2
Interest rate       LIBOR (90 days) plus 315 basis points      
Fixed interest rate       3.15%     3.15%
Number of repayment installments       20      
Repayment frequency       quarterly      
Balloon payment on the last repayment date       $ 7,000      
Navios Logistics Credit agreement              
Debt Instrument [Line Items]              
Line of credit facility issuance date       Aug. 17, 2018      
Line of credit facility maximum borrowing capacity       $ 7,091     € 6,200
Fixed interest rate       6.75%     6.75%
Maturity date       Aug. 17, 2020      
Number of repayment installments       24      
Repayment frequency       monthly      
Navios Logistics Term Loan B Facility              
Debt Instrument [Line Items]              
Line of credit facility issuance date       Nov. 03, 2017      
Line of credit facility maximum borrowing capacity       $ 100,000      
Interest rate       LIBOR plus 475 basis points      
Fixed interest rate       4.75%     4.75%
Duration of loan       4 years      
Debt amortization percentage       1.00%      
Debt Instrument Collateral       5 tanker vessels