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 ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
Dec. 18, 2013
USD ($)
Mar. 31, 2017
USD ($)
May 31, 2015
USD ($)
Oct. 09, 2013
USD ($)
Investments In And Advances To Affiliates [Line Items]                      
Long-term debt   $ 1,646,270 $ 1,628,896 $ 1,646,270 $ 1,628,896            
Investments in affiliates   189,195 388,772 189,195 388,772   $ 160,071        
Portion of the carrying balance of related party loan   28,727   28,727     23,008        
Equity in net (losses)/earnings of affiliated companies   (3,775) 3,424 1,307 16,376            
Proceeds from long-term loans       29,694 63,008            
Navios Partners                      
Investments In And Advances To Affiliates [Line Items]                      
Line of credit facility maximum borrowing capacity                   $ 60,000  
Equity in net (losses)/earnings of affiliated companies   473 473 946 887            
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   4,372   4,372     4,710 $ 6,763      
Estimated maximum potential loss       23,609     18,268        
Investents in affiliates including accrued interest   8,681   8,681     8,198        
Investments in affiliates   5,998   $ 5,998     5,967 $ 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 (losses)/earnings of affiliated companies   (16) 330 $ 158 669            
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   14,929   14,929     10,070        
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 7,482   7,482     7,953        
Estimated maximum potential loss       20,208     22,287        
Investents in affiliates including accrued interest   8,145   8,145     7,944        
Investments in affiliates 6,650 5,289   $ 5,289     5,894        
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 (losses)/earnings of affiliated companies   169 $ (73) $ 200 $ 16            
Number of vessels acquired           14          
Proceeds from long-term loans           $ 145,550          
Navios Europe II | New Junior Loan II                      
Investments In And Advances To Affiliates [Line Items]                      
Debt Instrument Face Amount           182,150          
Loans Payable Fair Value Disclosure           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   12,063   12,063     $ 14,343        
Increase in maximum borrowing capacity                 $ 14,000    
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   $ 43,500   $ 43,500              
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          
Navios Europe II | 14 Vessels | Senior Loan $131.550                      
Investments In And Advances To Affiliates [Line Items]                      
Cash consideration $ 131,550