Investment in affiliate companies and available-for-sale securities - Summarized financial information of the affiliate companies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]            
Revenue $ 159,221   $ 143,624   $ 287,011 $ 260,575
Net income 47,278 $ (5,128) 24,545 $ 1,314 42,150 25,859
Navios Partners [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenue 280,661   152,009   517,278 217,072
Time charter and voyage expenses (21,718)   (5,869)   (38,861) (8,364)
Direct vessel expenses (12,920)   (3,989)   (24,113) (7,143)
Vessel operating expenses (73,989)   (41,771)   (147,161) (64,733)
Net income $ 118,160   $ 99,913   $ 203,825 $ 236,592