Vessels, Port Terminals and Other Fixed Assets, Net (Details) - USD ($)
$ in Thousands
 2 Months Ended 11 Months Ended 12 Months Ended
Jan. 12, 2016
Feb. 28, 2018
Nov. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Aug. 31, 2018
Jul. 31, 2018
Mar. 31, 2018
Jul. 13, 2017
Jun. 16, 2017
Property Plant And Equipment [Line Items]                      
Cash consideration for purchase of vessel       $ 46,395 $ 0 $ 60,115          
Impairment loss       200,657 50,565 0          
Four dry bulk vessels held and used                      
Property Plant And Equipment [Line Items]                      
Impairment loss       $ 179,186              
Navios Magellan                      
Property Plant And Equipment [Line Items]                      
Disposal date       Dec. 31, 2018              
Year Built       2000              
Vessel capacity in DWT       74,333 dwt              
Vessel sale price       $ 6,950              
Vessel impairment loss       5,402              
Capitalized Cost, Impairment Loss       $ 726              
Navios Mars                      
Property Plant And Equipment [Line Items]                      
Date of delivery       Jan. 12, 2016              
Year Built       2016              
Vessel capacity in DWT       181,259 dwt              
Vessel acquisition cost $ 55,458                    
Navios Sphera                      
Property Plant And Equipment [Line Items]                      
Date of delivery       Jan. 12, 2016              
Year Built       2016              
Vessel capacity in DWT       84,872 dwt              
Vessel acquisition cost 34,352                    
Navios Mars and Navios Sphera                      
Property Plant And Equipment [Line Items]                      
Disposal date       Aug. 31, 2018              
Cash consideration for purchase of vessel 49,910                    
Amount of loan used to finance purchase of vessel $ 39,900                    
Amount transferred to vessels' cost           $ 29,695          
Vessel sale price             $ 79,000        
Vessel impairment loss       $ 2,759              
Navios Achilles                      
Property Plant And Equipment [Line Items]                      
Disposal date       Jul. 31, 2018              
Year Built       2001              
Vessel capacity in DWT       52,063 dwt              
Vessel sale price               $ 8,085      
Vessel impairment loss       $ 6,595              
Capitalized Cost, Impairment Loss       $ 584              
Navios Herakles                      
Property Plant And Equipment [Line Items]                      
Disposal date       Mar. 31, 2018              
Year Built       2001              
Vessel capacity in DWT       52,061 dwt              
Vessel sale price                 $ 7,682    
Vessel impairment loss       $ 6,715              
Capitalized Cost, Impairment Loss       $ 481              
One dry bulk vessel held and used                      
Property Plant And Equipment [Line Items]                      
Impairment loss         $ 32,930            
Navios Ionian                      
Property Plant And Equipment [Line Items]                      
Disposal date       Jun. 16, 2017              
Year Built       2000              
Vessel capacity in DWT       52,067 dwt              
Vessel sale price                     $ 5,280
Vessel impairment loss       $ 9,098              
Capitalized Cost, Impairment Loss       $ 551              
Navios Horizon                      
Property Plant And Equipment [Line Items]                      
Disposal date       Jul. 13, 2017              
Year Built       2001              
Vessel capacity in DWT       50,346 dwt              
Vessel sale price                   $ 6,548  
Vessel impairment loss       $ 5,141              
Capitalized Cost, Impairment Loss       $ 495              
Navios Primavera                      
Property Plant And Equipment [Line Items]                      
Date of delivery       Nov. 30, 2018              
Year Built       2007              
Vessel capacity in DWT       53,464 dwt              
Vessel acquisition cost     $ 12,130                
Cash consideration for purchase of vessel     $ 10,980                
Navios Equator Prosper                      
Property Plant And Equipment [Line Items]                      
Year Built       2000              
Vessel capacity in DWT       171,971 dwt              
Vessel acquisition cost   $ 10,255                  
Cash consideration for purchase of vessel   $ 10,255