Investments in Affiliates (Details) - USD ($)
$ in Thousands
2 Months Ended 8 Months Ended 10 Months Ended 12 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Sep. 30, 2013
Oct. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule Of Equity Method Investments [Line Items]              
Payments to acquire common stock         $ 22,846 $ 2,233 $ 167,919
Equity in net earnings of affiliated companies         61,484 57,751 19,344
Investments in affiliates         381,746 344,453 335,303
Dividends received         $ 18,244 $ 14,595 10,126
Navios Partners              
Schedule Of Equity Method Investments [Line Items]              
Common Units issued in public offering 4,600,000 6,325,000 10,925,000        
Proceeds From Issuance Of Common Limited Partners Units $ 60,214            
Proceeds from private placement of units to Navios Holdings $ 14,967            
Navios Partners | Private placement | Common units              
Schedule Of Equity Method Investments [Line Items]              
Private placement of units to Navios Holdings 1,120,547            
Navios Partners | Private placement | General partner units              
Schedule Of Equity Method Investments [Line Items]              
Private placement of units to Navios Holdings 22,868            
Navios Acquisition              
Schedule Of Equity Method Investments [Line Items]              
Number of shares issued-common stock   14,950,000          
Navios Partners              
Schedule Of Equity Method Investments [Line Items]              
General partner interest of Navios Holdings         2.00%    
Payments to acquire common stock   $ 2,233 $ 3,168        
Gain / (Loss) from the sale of shares by the equity method   $ 11,230 $ 15,991        
General Partner units held by Navios Holdings         1,695,509  
Common units held by Navios Holdings         15,344,310    
Difference between carrying amount of investment and underlying equity in net assets of equity method investee         $ 32,300 $ 35,745  
Equity in net earnings of affiliated companies         15,462 36,959 39,738
Investments in affiliates         115,432 114,387  
Dividends received         $ 27,993 30,043 29,461
Ownership percentage of Navios Holdings         20.10%    
Market value of the investment         $ 51,460    
Acropolis              
Schedule Of Equity Method Investments [Line Items]              
Investments in affiliates         175 525  
Dividends received         $ 454 271 433
Ownership percentage of Navios Holdings         35.00%    
Ownership Interest         50.00%    
Profit Sharing Arrangement         Navios Holdings has a 50% interest in Acropolis, a brokerage firm for freight and shipping charters. Although Navios Holdings owns 50% of Acropolis' stock, Navios Holdings agreed with the other shareholder that the earnings and amounts declared by way of dividends will be allocated 35% to the Company with the balance to the other shareholder.    
Navios Acquisition              
Schedule Of Equity Method Investments [Line Items]              
Number of shares issued-common stock     94,097,529        
Gain / (Loss) from the sale of shares by the equity method         $ 0 4,675  
Difference between carrying amount of investment and underlying equity in net assets of equity method investee         1,480 1,293  
Equity in net earnings of affiliated companies         43,299 19,513 (20,759)
Investments in affiliates         253,286 224,582  
Dividends received         $ 18,244 $ 14,595 10,126
Ownership percentage of Navios Holdings         46.60%    
Percentage of voting stock of Navios Holdings in Navios Acquisition         43.60%    
Shares vested from the outstanding restricted stock       699,994      
Market value of the investment         $ 219,661    
Navios Acquisition | Private placement              
Schedule Of Equity Method Investments [Line Items]              
Gain / (Loss) from the sale of shares by the equity method             $ (6,171)
Navios Acquisition | Private placement | Common units              
Schedule Of Equity Method Investments [Line Items]              
Payments to acquire common stock     $ 160,001        
Private placement of units to Navios Holdings     46,969,669