Summary of Significant Accounting Policies - Basis Of Presentation, Subsidiaries, Affiliates and Restricted Cash (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 21, 2018
Dec. 31, 2017
Dec. 31, 2016
Nov. 30, 2018
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net cash provided by operating activities $ 55,637   $ 48,117 $ 39,826    
Net cash provided by financing activities (66,916)   (12,940) 75,225    
Cash and cash equivalents and restricted cash $ 150,774   $ 134,190 141,378   $ 176,892
Stockholders' equity, Reverse stock split   one-for-ten reverse stock split        
Common stock shares outstanding 12,843,414   12,038,647      
Common stock par value $ 0.0001   $ 0.0001      
Adjustments to Common Stock, Reverse stock split $ (12)   $ (11)      
Adjustments to Additional Paid in Capital, Reverse stock split 12   11      
Restricted Cash And Cash Equivalents Items [Line Items]            
Restricted cash 12,892   6,558 5,386    
Retention Accounts            
Restricted Cash And Cash Equivalents Items [Line Items]            
Restricted cash 4,315   5,968      
Amount Held as Security            
Restricted Cash And Cash Equivalents Items [Line Items]            
Restricted cash 1,577   590      
Effect of Standard Adoption | ASU 2016-18            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net cash provided by operating activities     (2,666) 2,906    
Net cash provided by financing activities     3,839 (11,000)    
Cash and cash equivalents and restricted cash     $ 1,172 $ (8,094)    
Navios Containers            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Common stock shares outstanding         34,603,100  
Navios Containers | Retention Accounts            
Restricted Cash And Cash Equivalents Items [Line Items]            
Restricted cash $ 1,934          
Navios Logistics            
Schedule Of Equity Method Investments [Line Items]            
Ownership percentage of Navios Holdings 63.80%          
Navios Containers            
Schedule Of Equity Method Investments [Line Items]            
Ownership percentage of Navios Holdings 3.70%          
Navios Partners and its subsidiaries            
Schedule Of Equity Method Investments [Line Items]            
Economic interest 20.00%          
General partner interest of Navios Holdings 2.00%          
Navios Acquisition and its subsidiaries            
Schedule Of Equity Method Investments [Line Items]            
Economic interest 35.80%          
Navios Europe I and its subsidiaries            
Schedule Of Equity Method Investments [Line Items]            
Economic interest 47.50%          
Navios Europe II and its subsidiaries            
Schedule Of Equity Method Investments [Line Items]            
Economic interest 47.50%          
Navios Containers and its subsidiaries            
Schedule Of Equity Method Investments [Line Items]            
Economic interest         3.70%  
Before 1-for-10 reverse stock split            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Common stock shares outstanding 128,400,000   120,400,000      
2022 Notes            
Restricted Cash And Cash Equivalents Items [Line Items]            
Fixed interest rate 7.375%          
Restricted cash $ 7,000