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Investment in Affiliates - Navios Midstream (Details)
6 Months Ended 9 Months Ended 11 Months Ended
Jun. 18, 2018
shares
Oct. 13, 2014
Dec. 13, 2018
shares
Nov. 16, 2017
shares
Common Stock | Merger Agreement with Navios Midstream        
Investments In And Advances To Affiliates [Line Items]        
Stock for units exchange ratio     0.42  
Business Acquisition, Number of shares issued     3,683,284  
Navios Midstream        
Investments In And Advances To Affiliates [Line Items]        
General partner interest   2.00%    
Navios Midstream | Subordinated Units        
Investments In And Advances To Affiliates [Line Items]        
Partners' Capital Account, Units, Converted       9,342,692
Conversion ratio       1
Navios Midstream | Subordinated Series A Units        
Investments In And Advances To Affiliates [Line Items]        
Partners' Capital Account, Units, Converted 1,592,920      
Conversion ratio 1