Description of Business - Related Parties - Navios Europe I and Navios Europe II (Details)
6 Months Ended
Jun. 30, 2018
Feb. 18, 2015
Oct. 09, 2013
Navios Europe I      
Related Party Transaction [Line Items]      
Percentage of ownership 47.50%    
Navios Europe I | Navios Holdings      
Related Party Transaction [Line Items]      
Percentage of ownership     47.50%
Percentage of voting stock held 50.00%    
Navios Europe I | Navios Acquisition      
Related Party Transaction [Line Items]      
Percentage of ownership     47.50%
Percentage of voting stock held 50.00%    
Navios Europe I | Navios Partners      
Related Party Transaction [Line Items]      
Percentage of ownership     5.00%
Percentage of voting stock held 0.00%    
Navios Europe II      
Related Party Transaction [Line Items]      
Percentage of ownership 47.50%    
Navios Europe II | Navios Holdings      
Related Party Transaction [Line Items]      
Percentage of ownership   47.50%  
Percentage of voting stock held 50.00%    
Navios Europe II | Navios Acquisition      
Related Party Transaction [Line Items]      
Percentage of ownership   47.50%  
Percentage of voting stock held 50.00%    
Navios Europe II | Navios Partners      
Related Party Transaction [Line Items]      
Percentage of ownership   5.00%  
Percentage of voting stock held 0.00%    
Dry bulkers vessels | Navios Europe II      
Related Party Transaction [Line Items]      
Number of vessels 7    
Container vessels | Navios Europe I      
Related Party Transaction [Line Items]      
Number of vessels 5    
Container vessels | Navios Europe II      
Related Party Transaction [Line Items]      
Number of vessels 7    
Tanker vessels | Navios Europe I      
Related Party Transaction [Line Items]      
Number of vessels 5