Transactions with Related Parties (Details)
€ in Thousands, $ in Thousands
3 Months Ended 4 Months Ended 5 Months Ended 6 Months Ended 10 Months Ended 11 Months Ended 12 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Apr. 30, 2016
USD ($)
Jun. 05, 2015
May 31, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2016
EUR (€)
Jun. 30, 2015
USD ($)
Nov. 11, 2014
USD ($)
Nov. 18, 2014
Dec. 13, 2013
Dec. 31, 2015
USD ($)
Dec. 31, 2014
Aug. 31, 2016
USD ($)
Feb. 04, 2015
Dec. 31, 2013
USD ($)
Dividends received           $ 0   $ 7,298                
General and administrative expenses $ 6,392 $ 8,668       12,830   15,479                
Due from affiliate, total 16,183         16,183           $ 8,887        
Due from affiliate, current 17,461         17,461           12,669        
Due to affiliate, current 24,365         24,365           17,791        
Due to affiliate non-current 6,430         6,430           0        
Deferred gain recognized in Statement of Comprehensive Income 3,424 17,968       16,376   31,880                
Credit facility outstanding amount 254,956         254,956           233,136        
Loan receivable from affiliate companies - Book Value 21,827         21,827           16,474        
Goldland Anonymos Eteria                                
Annual lease payments of office           1,052 € 943                  
Acropolis                                
Commissions paid 0 2       0   6                
Dividends received 85 0       85   0                
Trade accounts payable 76         76           76        
Navios Partners                                
Unamortized deferred gain for vessels and rights sold 12,793         12,793           13,680        
Deferred gain recognized in Statement of Comprehensive Income 473 735       887   1,470                
Maximum borrowing capacity         $ 60,000                      
Amount drawn down     $ 21,000                          
Credit facility outstanding amount 0         $ 0                    
Interest rate description         LIBOR plus 300 basis points                      
Loan margin percentage         3.00%                      
Credit facility maturity date         Jan. 02, 2017                      
Navios Acquisition                                
Credit facility termination date           Apr. 14, 2016 Apr. 14, 2016                  
Maximum borrowing capacity 50,000         $ 50,000     $ 200,000     40,000        
Line Credit Facility Arrangement Fees                 $ 4,000              
Credit facility outstanding amount 0         $ 0           $ 40,000        
Interest rate description           LIBOR plus 300 basis points LIBOR plus 300 basis points         LIBOR plus 300 basis points        
Loan margin percentage           3.00% 3.00%         3.00%        
Fixed interest rate                 6.00%              
Credit facility maturity date           Dec. 31, 2018 Dec. 31, 2018         Dec. 31, 2015 Dec. 29, 2014      
Navios Midstream                                
Description of the option to acquire Navios Midstream           Navios Holdings entered into an option agreement, with Navios Acquisition under which Navios Acquisition, which owns and controls Navios Midstream GP LLC ('Midstream General Partner'), granted Navios Holdings the option to acquire a minimum of 25% of the outstanding membership interests in Navios Maritime Midstream GP LLC and the incentive distribution rights in Navios Midstream representing the right to receive an increasing percentage of the quarterly distributions when certain conditions are met. The option shall expire on November 18, 2024. The purchase price for the acquisition for all or part of the option interest shall be an amount equal to its fair market value. As of June 30, 2016, Navios Holdings had not exercised any part of that option. Navios Holdings entered into an option agreement, with Navios Acquisition under which Navios Acquisition, which owns and controls Navios Midstream GP LLC ('Midstream General Partner'), granted Navios Holdings the option to acquire a minimum of 25% of the outstanding membership interests in Navios Maritime Midstream GP LLC and the incentive distribution rights in Navios Midstream representing the right to receive an increasing percentage of the quarterly distributions when certain conditions are met. The option shall expire on November 18, 2024. The purchase price for the acquisition for all or part of the option interest shall be an amount equal to its fair market value. As of June 30, 2016, Navios Holdings had not exercised any part of that option.                  
Affiliates excluding Navios Europe I & Navios Europe II                                
Due from affiliate, total 16,183         $ 16,183           $ 8,887        
Due to affiliate, current 24,313         24,313           17,791        
Due to affiliate non-current 6,430         6,430           0        
Navios Partners Agreement                                
Maximum payout of company under Navios Partner's guarantee                               $ 20,000
Amount of future charter payments covered by guarantee 19,445         19,445                    
General and administrative expenses 1,938 1,505       3,876   3,105                
Navios Acquisition Agreement                                
General and administrative expenses 2,375 1,935       4,768   3,861                
Navios Logistics Agreement                                
General and administrative expenses 250 190       500   380                
Navios Europe I Agreement                                
General and administrative expenses 323 201       646   397                
Administrative services agreement term in years                     6 years          
Navios Midstream Agreement                                
General and administrative expenses 375 214       750   414                
Administrative services agreement term in years                   5 years            
Navios Europe II Agreement                                
General and administrative expenses 453 27       $ 906   27                
Administrative services agreement term in years       6 years                        
Minimum | Navios Midstream                                
Option agreement percentage interests           25.00% 25.00%                  
Minimum | Share purchase agreement with Navios Partners                                
Ownership percentage of Navios Holdings                             20.00%  
Navios Partners                                
Dividends received 0 8,124       $ 0   16,248                
Deferred gain recognized in Statement of Comprehensive Income $ (2,421) $ 4,097       $ (1,467)   $ 8,170                
Ownership percentage of Navios Holdings 20.10%         20.10%                    
Navios Europe I                                
Due from affiliate, total $ 1,747         $ 1,747           1,609        
Due from affiliate, current 52         52           211        
Due from affiliate, non current $ 1,799         $ 1,799           1,398        
Ownership percentage of Navios Holdings 47.50%         47.50%                    
Navios Europe I | Navios Revolving Loans I                                
Preferred Distribution Percentage           12.70% 12.70%                  
Loan receivable from affiliate companies - Book Value $ 7,125         $ 7,125           7,125        
Navios Europe I | Navios Revolving Loans I | Navios Holdings, Navios Acquisitions,Navios Partners                                
Available amount of loan facility 9,100         9,100                    
Navios Europe II                                
Due from affiliate, total 2,580         2,580           4,196        
Due from affiliate, current 1,278         1,278           3,571        
Due from affiliate, non current $ 1,302         $ 1,302           625        
Ownership percentage of Navios Holdings 47.50%         47.50%                    
Navios Europe II | Navios Revolving Loans II                                
Preferred Distribution Percentage           18.00% 18.00%                  
Loan receivable from affiliate companies - Book Value $ 11,602         $ 11,602           $ 7,327        
Funding Commitment | Navios Europe I | Navios Revolving Loans I                                
Available amount of loan facility 9,100         9,100               $ 4,323    
Funding Commitment | Navios Europe II | Navios Revolving Loans II                                
Available amount of loan facility $ 14,075         $ 14,075               $ 6,686