Vessels, Port Terminals and Other Fixed Assets, Net (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 12, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jul. 13, 2017
USD ($)
Jun. 30, 2017
EUR (€)
Jun. 16, 2017
USD ($)
May 19, 2017
USD ($)
May 18, 2017
USD ($)
Feb. 28, 2017
USD ($)
Jun. 03, 2016
USD ($)
Mar. 31, 2016
USD ($)
Property Plant And Equipment [Line Items]                            
Cash consideration received       $ 5,280 $ 0                  
Cash consideration for purchase of vessel       0 60,115                  
Purchase price obligation   $ 0   0   $ 17,617                
Repayments of obligations under capital leases       12,374 2,094                  
Payments for construction in progress       25,972 44,628                  
Vessels, port terminals and other fixed assets, net   1,889,671   1,889,671   1,821,101                
Vessel impairment loss   5,141 $ 0 14,239 0                  
Vessel sale price             $ 6,548              
Prepaid expenses and other current assets   27,467   27,467   28,896                
Other long term assets   38,450   38,450   40,428                
Vessels, Port Terminals and Other Fixed Assets | Three pushboats                            
Property Plant And Equipment [Line Items]                            
Capitalized interest costs       $ 2,563   1,934                
Navios Sphera                            
Property Plant And Equipment [Line Items]                            
Year Built       2016                    
Date of delivery       Jan. 12, 2016                    
Vessel capacity in DWT       84,872 dwt                    
Vessel acquisition cost $ 34,352                          
Navios Sphera and Navios Mars                            
Property Plant And Equipment [Line Items]                            
Cash consideration for purchase of vessel 49,910                          
Amount transferred to vessels' cost                           $ 29,695
Amount of loan used to finance purchase of vessel 39,900                          
Navios Mars                            
Property Plant And Equipment [Line Items]                            
Year Built       2016                    
Date of delivery       Jan. 12, 2016                    
Vessel capacity in DWT       181,259 dwt                    
Vessel acquisition cost $ 55,458                          
Navios Ionian                            
Property Plant And Equipment [Line Items]                            
Disposal date       Jun. 16, 2017                    
Year Built       2000                    
Vessel capacity in DWT       52,067 dwt                    
Vessel impairment loss       $ 9,098                    
Vessel sale price                 $ 5,280          
Capitalized Cost, Impairment Loss       $ 551                    
Navios Horizon                            
Property Plant And Equipment [Line Items]                            
Disposal date       May 19, 2017                    
Year Built       2001                    
Vessel capacity in DWT       50,346 dwt                    
Vessel impairment loss       $ 5,141                    
Vessel sale price                   $ 6,548        
Capitalized Cost, Impairment Loss       $ 495                    
Navios Logistics | Ferni H                            
Property Plant And Equipment [Line Items]                            
Vessel capacity in DWT       16,871 dwt                    
Navios Logistics | San San H                            
Property Plant And Equipment [Line Items]                            
Vessel capacity in DWT       16,871 dwt                    
Navios Logistics | Ferni H and San San H                            
Property Plant And Equipment [Line Items]                            
Date of delivery       May 18, 2017                    
Repayments of obligations under capital leases         $ 3,032                  
Vessel acquisition cost                     $ 11,239      
Navios Logistics | Three new pushboats, price per each                            
Property Plant And Equipment [Line Items]                            
Total purchase price                         $ 7,344  
Payments for construction in progress       $ 24,239   16,156                
Date of expected delivery       Q3 2017                    
Navios Logistics | River and estuary tanker                            
Property Plant And Equipment [Line Items]                            
Total purchase price   14,178   $ 14,178       € 12,400            
Payments for construction in progress       $ 2,880                    
Date of expected delivery       Q1 2018                    
Capitalized interest costs       $ 44                    
Line of credit facility maximum borrowing capacity   7,074   7,074       € 6,200            
Navios Logistics | Expansion of its dry port                            
Property Plant And Equipment [Line Items]                            
Payments for construction in progress           120,735                
Capitalized interest costs       9,971   $ 6,862                
Vessels, port terminals and other fixed assets, net   137,357   137,357                    
Navios Logistics | Formosa and San Lorenzo                            
Property Plant And Equipment [Line Items]                            
Vessel sale price                       $ 1,109    
Prepaid expenses and other current assets   315   315                    
Other long term assets   $ 594   $ 594