Loss Per Common Share (Table) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Numerator:        
Net loss attributable to Navios Holdings common stockholders $ (37,258) $ (26,416) $ (85,977) $ (33,881)
Less:        
Declared and undeclared dividend on preferred stock and on unvested restricted shares (2,660) (3,971) (5,304) (7,941)
Plus        
Tender Offer – Redemption of preferred stock Series G and Series H including $270 of undeclared preferred dividend cancelled 504 0 504 0
Loss available to Navios Holdings common stockholders, basic and diluted $ (39,414) $ (30,387) $ (90,777) $ (41,822)
Denominator:        
Denominator for basic and diluted net loss per share attributable to Navios Holdings common stockholders - weighted average shares 116,051,809 106,009,049 115,612,780 106,022,826
Basic and diluted net losses per share attributable to Navios Holdings common stockholders $ (0.34) $ (0.29) $ (0.79) $ (0.39)