Borrowings - Senior and Ship Mortgage Notes Navios Holdings and Navios Logistics (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 10 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Oct. 31, 2016
Dec. 31, 2017
Debt Instrument [Line Items]            
Amount used for repayment of debt     $ 19,342      
Gain/ (Loss) on bond and debt extinguishment $ 0 $ 1,715 0 $ 1,715    
Navios Logistics            
Debt Instrument [Line Items]            
Face amount at issuance date 162,715   $ 162,715      
Navios Logistics | Minimum            
Debt Instrument [Line Items]            
Maturity date     Sep. 30, 2021      
Navios Logistics | Maximum            
Debt Instrument [Line Items]            
Maturity date     Nov. 30, 2024      
2022 Senior Secured Notes            
Debt Instrument [Line Items]            
Face amount at issuance date $ 305,000   $ 305,000      
Issuance date/Date of agreement     Nov. 21, 2017      
Debt instrument, issuance price percentage     97.00%      
Fixed interest rate 11.25%   11.25%      
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   $ 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   $ 650,000      
Issuance date/Date of agreement     Nov. 29, 2013      
Amount oustanding $ 650,000   $ 650,000     $ 650,000
Fixed interest rate 7.375%   7.375%      
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            
Debt Instrument [Line Items]            
Amount oustanding $ 375,000   $ 375,000     $ 375,000
2022 Logistics Senior Notes | Navios Logistics            
Debt Instrument [Line Items]            
Face amount at issuance date $ 375,000   $ 375,000      
Issuance date/Date of agreement     Apr. 22, 2014      
Fixed interest rate 7.25%   7.25%      
Maturity date     May 01, 2022      
Maximum dividend percentage     6.00%      
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%