Transactions with Related Parties (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 4 Months Ended 5 Months Ended 10 Months Ended 11 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
shares
Mar. 20, 2017
shares
Mar. 17, 2017
USD ($)
shares
Apr. 30, 2016
USD ($)
Jun. 07, 2017
Jun. 05, 2015
Nov. 11, 2014
USD ($)
Nov. 18, 2014
Dec. 13, 2013
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2010
USD ($)
Sep. 19, 2016
Feb. 04, 2015
Dec. 31, 2012
USD ($)
General and administrative expenses                   $ 27,521   $ 25,295 $ 34,183        
Due from affiliate, current                   4,002   8,548          
Long-term receivable from affiliate companies                   0   11,105          
Due to affiliate, current                   16,749   32,847          
Due to affiliate, non current                   76,872   6,399          
Deferred gain recognized in Statement of Comprehensive Income                   4,399   (202,779) 61,484        
Long-term debt                   1,682,488   1,651,095 1,581,308        
Investments in affiliates                   183,160   160,071 381,746        
Loan receivable from affiliate companies                   30,112   23,008          
Outstanding balance                   0   49,876          
Other long term liabilities and deferred income                   43,382   43,388          
Goldland Anonymos Eteria                                  
Annual lease payments of office                   1,065 € 943            
Acropolis                                  
Commissions paid                   0   0 6        
Trade accounts payable                   $ 76   76          
Navios Partners                                  
Termination date of the administrative services agreement                   December 31, 2022 December 31, 2022            
Long-term receivable from affiliate companies                   $ 0   11,105          
Due to affiliate, current                   8,315   8,664          
Due to affiliate, non current                   14,891   0          
Unamortized deferred gain for vessels and rights sold                   9,955   11,846          
Deferred gain recognized in Statement of Comprehensive Income                   1,892   1,833 2,621        
Maximum borrowing capacity                         $ 60,000        
Credit facility outstanding amount                   $ 0              
Interest rate description                         LIBOR plus 300 basis points        
Loan margin percentage                         3.00%        
Credit facility maturity date                         Jan. 02, 2017        
Loan receivable from affiliate companies                       0          
Amount drawn down       $ 21,000                          
Number of shares issued-common stock | shares   47,795,000                              
Navios Acquisition                                  
Termination date of the administrative services agreement                   May 2020 May 2020            
Long-term receivable from affiliate companies                   $ 0              
Due to affiliate, current                   2,800   19,383          
Due to affiliate, non current                   15,236   6,399          
Line Credit Facility Arrangement Fees             $ 4,000                    
Credit facility outstanding amount                   $ 0   0          
Interest rate description                   LIBOR plus 300 basis points LIBOR plus 300 basis points            
Credit facility maturity date                   Dec. 31, 2015 Dec. 31, 2015            
Navios Midstream                                  
Due to affiliate, current                   $ 990   4,800          
Due to affiliate, non current                   $ 4,554   0          
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 Maritime Midstream Partners GP LLC ("Midstream General Partner"), granted Navios Holdings the option to acquire a minimum of 25% of the outstanding membership interests in Midstream General Partner 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 December 31, 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 Maritime Midstream Partners GP LLC ("Midstream General Partner"), granted Navios Holdings the option to acquire a minimum of 25% of the outstanding membership interests in Midstream General Partner 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 December 31, 2016, Navios Holdings had not exercised any part of that option.            
Navios Containers                                  
Due to affiliate, current                   $ 3,334   0          
Due to affiliate, non current                   7,965   0          
Deferred gain recognized in Statement of Comprehensive Income                   $ 161              
Ownership percentage of Navios Holdings                   3.40%              
Investments in affiliates                   $ 5,161              
Navios Acquisition Loan                                  
Line of credit facility issuance date                   Sep. 19, 2016 Sep. 19, 2016            
Maximum borrowing capacity                   $ 70,000              
Line Credit Facility Arrangement Fees                   700              
Credit facility outstanding amount                   0   51,240          
Navios Acquisition Loan | Navios Logistics                                  
Ownership percentage of Navios Holdings                             78.50%    
Navios Partners Agreement                                  
Maximum payout of company under Navios Partner's guarantee                                 $ 20,000
General and administrative expenses                   8,347   7,751 $ 6,205        
Navios Partners Agreement | Guarantee claim                                  
Other long term liabilities and deferred income                   20,000   19,739          
Navios Acquisition Agreement                                  
General and administrative expenses                   9,000   9,427 7,608        
Navios Logistics Agreement                                  
General and administrative expenses                   1,000   1,000 760        
Termination date of the administrative services agreement       December 2021                          
Navios Europe I Agreement                                  
General and administrative expenses                   1,187   1,300 800        
Administrative services agreement term in years                 6 years                
Navios Midstream Agreement                                  
General and administrative expenses                   1,500   1,500 1,014        
Administrative services agreement term in years               5 years                  
Navios Europe II Agreement                                  
General and administrative expenses                   1,766   1,820 550        
Administrative services agreement term in years           6 years                      
Navios Containers agreement                                  
General and administrative expenses                   $ 1,868              
Administrative services agreement term in years         5 years                        
Navios Containers agreement with automatic extension                                  
Administrative services agreement term in years                   5 years 5 years            
Navios Revolving Loans I Transfer                                  
Due to affiliate, non current                   $ 34,227              
Long-term liability recognized     $ 33,473                            
Proceeds from transfer of debt     4,050                            
Consideration received     33,473                            
Debt instrument unamortized premium     12,089             $ 10,390              
Navios Revolving Loans I Transfer | Navios Partners                                  
Loan receivable from affiliate companies     $ 21,384                            
Number of shares issued-common stock | shares     13,076,923                            
Consideration equity component     $ 29,423                            
Share Repurchase Program                                  
General partnership interests | shares 1,313,399                                
Minimum | Navios Midstream                                  
Ownership percentage of Navios Holdings                   25.00%              
Minimum | Share purchase agreement with Navios Partners                                  
Ownership percentage of Navios Holdings                               20.00%  
Short Term debt | Navios Acquisition                                  
Maximum borrowing capacity                           $ 40,000      
Interest rate description                           LIBOR plus 300 bps      
Loan margin percentage                           3.00%      
Credit facility maturity date                           Jan. 02, 2017      
Navios Holdings debt | Navios Acquisition                                  
Maximum borrowing capacity             $ 200,000                    
Loan margin percentage             6.00%                    
Navios Partners                                  
Deferred gain recognized in Statement of Comprehensive Income                   $ 12,570   (5,979) 15,462        
Ownership percentage of Navios Holdings                   20.80%              
Investments in affiliates                   $ 66,773   24,033          
Navios Europe I                                  
Due from affiliate, total                   7,176   2,376          
Due from affiliate, current                   4,002   145          
Long-term receivable from affiliate companies                   $ 3,174   2,231          
Ownership percentage of Navios Holdings                   47.50%              
Navios Europe I | Navios Revolving Loans I                                  
Preferred Distribution Percentage                   12.70% 12.70%            
Loan receivable from affiliate companies                   $ 11,125   7,125          
Navios Europe I | Navios Revolving Loans I | Navios Holdings, Navios Acquisitions,Navios Partners                                  
Available amount of loan facility                   0              
Navios Europe II                                  
Due from affiliate, total                   2,440   10,453          
Due from affiliate, current                   1,310   8,402          
Long-term receivable from affiliate companies                   $ 3,750   2,051          
Ownership percentage of Navios Holdings                   47.50%              
Navios Europe II | Navios Holdings, Navios Acquisition and Navios Partners                                  
Available amount of loan facility                   $ 15,003              
Navios Europe II | Navios Revolving Loans II                                  
Preferred Distribution Percentage                   18.00% 18.00%            
Loan receivable from affiliate companies                   $ 12,063   11,602          
Navios Europe II | Navios Revolving Loans II | Navios Holdings, Navios Acquisitions,Navios Partners                                  
Line of Credit Facility, Increase $ 14,000                                
Navios Europe II | Navios Revolving Loans II | Maximum | Funding Commitment                                  
Available amount of loan facility                   15,003              
Navios Acquisition                                  
Deferred gain recognized in Statement of Comprehensive Income                   $ (9,875)   29,801 $ 43,299        
Ownership percentage of Navios Holdings                   46.20%              
Investments in affiliates                   $ 99,590   $ 124,062          
Navios Midstream                                  
Ownership percentage of Navios Holdings                   0.00%