Investments in affiliates and investments in available-for-sale securities (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Navios Partners      
Balance sheet      
Cash and cash equivalents, including restricted cash $ 61,455 $ 29,933  
Current assets 111,112 60,306  
Non-current assets 1,203,021 1,244,996  
Current liabilities 52,333 54,247  
Long- term debt including current portion, net 507,485 493,463  
Non-current liabilities 485,047 483,345  
Income Statement      
Revenue 231,361 211,652 $ 190,524
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (13,081) (15,090) (52,549)
Net (loss)/ income (13,081) (15,090) (52,549)
Navios Acquisition      
Balance sheet      
Cash and cash equivalents, including restricted cash 46,609 86,458  
Current assets 103,978 119,733  
Non-current assets 1,523,406 1,453,048  
Current liabilities 92,159 74,618  
Long- term debt including current portion, net 1,205,837 1,065,369  
Non-current liabilities 1,154,873 1,035,688  
Income Statement      
Revenue 187,946 227,288 290,245
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (82,233) (75,153) 59,715
Net (loss)/ income (82,233) (75,153) 59,715
Navios Europe I      
Balance sheet      
Cash and cash equivalents, including restricted cash 19,160 19,185  
Current assets 22,732 22,417  
Non-current assets 139,955 145,940  
Current liabilities 83,059 21,284  
Long- term debt including current portion, net 64,818 75,472  
Non-current liabilities 61,035 125,283  
Income Statement      
Revenue 34,885 37,468 40,589
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (22,881) (20,778) (2,174)
Net (loss)/ income (3,197) 9,762 16,137
Navios Europe II      
Balance sheet      
Cash and cash equivalents, including restricted cash 27,544 16,882  
Current assets 33,479 28,403  
Non-current assets 195,805 195,784  
Current liabilities 39,150 25,805  
Long- term debt including current portion, net 99,153 109,223  
Non-current liabilities 168,195 164,276  
Income Statement      
Revenue 49,870 38,633 30,893
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (12,899) 22,749 (25,062)
Net (loss)/ income $ (12,169) (9,086) $ (34,059)
Navios Containers      
Balance sheet      
Cash and cash equivalents, including restricted cash   14,501  
Current assets   21,371  
Non-current assets   245,440  
Current liabilities   49,559  
Long- term debt including current portion, net   119,033  
Non-current liabilities   76,534  
Income Statement      
Revenue   39,188  
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II   2,638  
Net (loss)/ income   $ 2,638