Earnings/(Loss) per Common Share - Earnings/Loss per share, basic and diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Numerator:        
Net income/ (loss) attributable to Navios Holdings common stockholders $ 24,936 $ (35,271) $ 25,099 $ (88,546)
Less:        
Declared and undeclared dividend on preferred stock and on unvested restricted shares (1,284) (1,284) (2,561) (2,578)
Plus:        
Gain from eliminated dividends (preferred stock) due to conversion 0 0 0 166
Income/ (loss) attributable to Navios Holdings common stockholders, basic and diluted $ 23,652 $ (36,555) $ 22,538 $ (90,958)
Denominator:        
Denominator for basic earnings/ (loss) per share attributable to Navios Holdings common stockholders — weighted average shares 13,127,208 12,901,880 13,120,335 12,882,235
Basic earnings/ (loss) per share attributable to Navios Holdings common stockholders $ 1.80 $ (2.83) $ 1.72 $ (7.06)
Denominator for diluted earnings/ (loss) per share attributable to Navios Holdings common stockholders — weighted average shares 13,511,627 12,901,880 13,508,382 12,882,235
Diluted earnings/ (loss) per share attributable to Navios Holdings common stockholders $ 1.75 $ (2.83) $ 1.67 $ (7.06)