Vessels, Port Terminals and Other Fixed Assets - Impairment Loss/ Loss on Sale of Vessels, Net 2019 (Details) - USD ($)
$ in Thousands
 2 Months Ended 11 Months Ended 12 Months Ended
Feb. 28, 2018
Nov. 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jan. 31, 2020
Sep. 30, 2019
Aug. 30, 2019
Jul. 31, 2019
Jun. 30, 2019
May 31, 2019
Mar. 31, 2019
Property Plant And Equipment [Line Items]                        
Impairment loss and gain/(loss) on sale of vessels     $ (88,367) $ (156,106) $ (200,657)              
Two dry bulk vessels held and used                        
Property Plant And Equipment [Line Items]                        
Impairment loss     $ 52,820 $ 84,584                
Navios Hios                        
Property Plant And Equipment [Line Items]                        
Disposal date       Jan. 31, 2020                
Year Built       2003                
Vessel capacity in DWT       55,180 dwt                
Vessel sale price           $ 7,497            
Impairment loss and gain/(loss) on sale of vessels       $ (7,429)                
Capitalized Cost, Impairment Loss       $ 611                
Navios Primavera                        
Property Plant And Equipment [Line Items]                        
Disposal date       Sep. 30, 2019                
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                    
Vessel sale price             $ 9,891          
Impairment loss and gain/(loss) on sale of vessels       $ (1,673)                
Navios Mercator                        
Property Plant And Equipment [Line Items]                        
Disposal date       Aug. 30, 2019                
Year Built       2002                
Vessel capacity in DWT       53,553 dwt                
Vessel sale price               $ 6,664        
Impairment loss and gain/(loss) on sale of vessels       $ (4,849)                
Capitalized Cost, Impairment Loss       $ 490                
Navios Arc                        
Property Plant And Equipment [Line Items]                        
Disposal date       Jul. 31, 2019                
Year Built       2003                
Vessel capacity in DWT       53,514 dwt                
Vessel sale price                 $ 7,105      
Impairment loss and gain/(loss) on sale of vessels       $ (5,149)                
Capitalized Cost, Impairment Loss       $ 685                
Navios Vector                        
Property Plant And Equipment [Line Items]                        
Disposal date       Jun. 30, 2019                
Year Built       2002                
Vessel capacity in DWT       50,296 dwt                
Vessel sale price                   $ 6,860    
Impairment loss and gain/(loss) on sale of vessels       $ (10,039)                
Capitalized Cost, Impairment Loss       $ 673                
Navios Equator Prosper                        
Property Plant And Equipment [Line Items]                        
Disposal date       May 31, 2019                
Year Built       2000                
Vessel capacity in DWT       171,191 dwt                
Vessel acquisition cost $ 10,255                      
Cash consideration for purchase of vessel $ 10,255                      
Vessel sale price                     $ 11,520  
Impairment loss and gain/(loss) on sale of vessels       $ 1,784                
Navios Meridian                        
Property Plant And Equipment [Line Items]                        
Disposal date       Mar. 31, 2019                
Year Built       2002                
Vessel capacity in DWT       50,316 dwt                
Vessel sale price                       $ 6,790
Impairment loss and gain/(loss) on sale of vessels       $ (5,531)                
Capitalized Cost, Impairment Loss       $ 778