Loss Per Common Share (Table) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Numerator:      
Net loss attributable to Navios Holdings common stockholders $ (192,110) $ (268,718) $ (165,910)
Declared and undeclared dividend on preferred stock and on unvested restricted shares (7,178) (10,241) (10,421)
Tender Offer - Redemption of preferred stock Series G and H including $16,863 and $972 of undeclared preferred dividend cancelled for the year ended December 31, 2019 and December 31, 2017, respectively 45,680 0 1,033
Loss attributable to Navios Holdings common stockholders, basic and diluted $ (153,608) $ (278,959) $ (175,298)
Denominator:      
Denominator for basic and diluted net loss per share attributable to Navios Holdings common stockholders - adjusted weighted shares 12,356,024 11,958,959 11,667,346
Basic and diluted net loss per share attributable to Navios Holdings common stockholders $ (12.43) $ (23.33) $ (15.02)