Vessels, Port Terminals and Other Fixed Assets, Net (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Aug. 31, 2020
May 31, 2020
Feb. 29, 2020
Property Plant And Equipment [Line Items]                  
Impairment loss and gain/(loss) on sale of vessels   $ (8,967)   $ (18,253) $ (20,215) $ (23,784)      
Navios Amitie                  
Property Plant And Equipment [Line Items]                  
Disposal date         Jun. 30, 2020        
Year Built         2005        
Vessel capacity in DWT         75,395 dwt        
Impairment loss and gain/(loss) on sale of vessels         $ (4,478)        
Vessel sale price   $ 6,887     $ 6,887        
Navios Northern Star                  
Property Plant And Equipment [Line Items]                  
Disposal date         Aug. 31, 2020        
Year Built         2005        
Vessel capacity in DWT         75,395 dwt        
Impairment loss and gain/(loss) on sale of vessels         $ (4,489)        
Vessel sale price             $ 6,860    
Navios Star                  
Property Plant And Equipment [Line Items]                  
Disposal date         May 31, 2020        
Year Built         2002        
Vessel capacity in DWT         76,662 dwt        
Impairment loss and gain/(loss) on sale of vessels         $ (5,697)        
Vessel sale price               $ 6,450  
Capitalized Cost, Impairment Loss         $ 258        
Navios Hios and Navios Kypros                  
Property Plant And Equipment [Line Items]                  
Disposal date         Feb. 29, 2020        
Vessel sale price                 $ 16,628
Navios Kypros                  
Property Plant And Equipment [Line Items]                  
Year Built         2003        
Vessel capacity in DWT         55,222 dwt        
Impairment loss and gain/(loss) on sale of vessels         $ (5,551)        
Capitalized Cost, Impairment Loss         $ 404        
Navios Hios                  
Property Plant And Equipment [Line Items]                  
Year Built         2003        
Vessel capacity in DWT         55,180 dwt        
Jupiter N and Rainbow N                  
Property Plant And Equipment [Line Items]                  
Date of delivery         Jun. 30, 2020        
Vessel acquisition cost         $ 24,883        
Jupiter N                  
Property Plant And Equipment [Line Items]                  
Year Built         2011        
Vessel capacity in DWT         93,062 dwt        
Rainbow N                  
Property Plant And Equipment [Line Items]                  
Year Built         2011        
Vessel capacity in DWT         79,642 dwt        
Navios Corali                  
Property Plant And Equipment [Line Items]                  
Date of delivery         Mar. 31, 2020        
Year Built         2015        
Vessel capacity in DWT         181,249 dwt        
Vessel acquisition cost     $ 36,684            
Cash consideration for purchase of vessel     $ 36,684            
Navios Canary                  
Property Plant And Equipment [Line Items]                  
Date of delivery         Jan. 31, 2020        
Year Built         2015        
Vessel capacity in DWT         180,528 dwt        
Vessel acquisition cost $ 35,111                
Cash consideration for purchase of vessel $ 35,111