Investments in Affiliates and Available-for-Sale Securities - Navios Europe I and Navios Europe II (Details)
$ in Thousands
2 Months Ended 3 Months Ended 6 Months Ended 7 Months Ended 12 Months Ended
Feb. 18, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 18, 2013
USD ($)
Oct. 09, 2013
USD ($)
Investments In And Advances To Affiliates [Line Items]                  
Long-term debt   $ 1,628,896 $ 1,584,023 $ 1,628,896 $ 1,584,023        
Investments in affiliates   388,772 371,405 388,772 371,405 $ 381,746 $ 381,746    
Portion of the carrying balance of related party loan   21,827   21,827   16,474 16,474    
Equity in net earnings of affiliated companies   3,424 17,968 16,376 31,880        
Proceeds from long-term loans       63,008 0        
Navios Europe I                  
Investments In And Advances To Affiliates [Line Items]                  
Difference between carrying amount of investment and underlying equity in net assets of equity method investee   5,048   5,048   5,386 5,386 $ 6,763  
Estimated maximum potential loss       17,011     15,763    
Investments in affiliates   7,564   7,564   6,895 6,895    
Investments in affiliates   5,765   $ 5,765   5,497 5,497 $ 4,750  
Profit Sharing Arrangement       On an ongoing basis, Navios Europe I is required to distribute cash flows (after payment of operating expenses and amounts due pursuant to the terms of the Senior Loans I) according to a defined waterfall calculation.          
Equity in net earnings of affiliated companies   330 399 $ 669 560        
Number of vessels acquired               10  
Navios Europe I | Navios Revolving Loans I                  
Investments In And Advances To Affiliates [Line Items]                  
Portion of the carrying balance of related party loan   9,447   9,447   8,868 8,868    
Navios Europe I | Navios Revolving Loans I | Navios Holdings, Navios Acquisition and Navios Partners                  
Investments In And Advances To Affiliates [Line Items]                  
Line of credit facility maximum borrowing capacity                 $ 24,100
Navios Europe I | 10 vessels | Navios Holdings, Navios Acquisition and Navios Partners                  
Investments In And Advances To Affiliates [Line Items]                  
Long-term debt               $ 10,000  
Navios Europe II                  
Investments In And Advances To Affiliates [Line Items]                  
Difference between carrying amount of investment and underlying equity in net assets of equity method investee $ 9,419 8,424   8,424   8,895 8,895    
Estimated maximum potential loss       21,083     15,858    
Investments in affiliates   7,974   7,974   7,958 7,958    
Investments in affiliates 6,650 6,672   $ 6,672   $ 7,333 7,333    
Profit Sharing Arrangement       On an ongoing basis, Navios Europe II is required to distribute cash flows (after payment of operating expenses, amounts due pursuant to the terms of the Senior Loans II) according to a defined waterfall calculation.          
Equity in net earnings of affiliated companies   (73) $ 33 $ 16 $ 33        
Number of vessels acquired           14      
Proceeds from long-term loans           $ 131,550      
Navios Europe II | New Junior Loan II                  
Investments In And Advances To Affiliates [Line Items]                  
Debt Instrument Face Amount           182,150 182,150    
Loans Payable Fair Value Disclosure           99,147 99,147    
Navios Europe II | Navios Revolving Loans II                  
Investments In And Advances To Affiliates [Line Items]                  
Portion of the carrying balance of related party loan   13,109   13,109   7,900 7,900    
Navios Europe II | Navios Revolving Loans II | Navios Holdings, Navios Acquisition and Navios Partners                  
Investments In And Advances To Affiliates [Line Items]                  
Line of credit facility maximum borrowing capacity   $ 38,500   $ 38,500          
Navios Europe II | 14 Vessels | Navios Holdings, Navios Acquisition and Navios Partners                  
Investments In And Advances To Affiliates [Line Items]                  
Long-term debt           $ 14,000 $ 14,000    
Navios Europe II | 14 Vessels | Senior Loan $131.550                  
Investments In And Advances To Affiliates [Line Items]                  
Cash consideration $ 145,550