Summary of Significant Accounting Policies - Basis Of Presentation, Subsidiaries, Affiliates and Restricted Cash (Details) - USD ($)
$ / shares in Units, $ in Thousands
 11 Months Ended 12 Months Ended
Jan. 03, 2019
Dec. 06, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Feb. 29, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Nov. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Stockholders' equity, Reverse stock split one-for-ten reverse stock split                  
Common stock shares outstanding     13,360,356 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     $ 736 $ 12,892            
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          
Retention Accounts                    
Restricted Cash And Cash Equivalents Items [Line Items]                    
Restricted cash     726 $ 4,315            
Amount Held as Security                    
Restricted Cash And Cash Equivalents Items [Line Items]                    
Restricted cash     $ 10 1,577            
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 Partners and its subsidiaries                    
Schedule Of Equity Method Investments [Line Items]                    
Economic interest     18.50%              
Navios Acquisition and its subsidiaries                    
Schedule Of Equity Method Investments [Line Items]                    
Economic interest     31.00%              
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%              
Acropolis Chartering and Shipping Inc. ("Acropolis")                    
Schedule Of Equity Method Investments [Line Items]                    
Ownership percentage of Navios Holdings   50.00%                
Economic interest   35.00%                
Navios Containers                    
Schedule Of Equity Method Investments [Line Items]                    
Ownership percentage of Navios Holdings     3.70%              
2022 Notes                    
Restricted Cash And Cash Equivalents Items [Line Items]                    
Fixed interest rate     7.375%              
Restricted cash       $ 7,000   $ 5,971 $ 10,129 $ 7,410 $ 14,000