| Loss per share, basic and diluted |
| | | | | | | | | | | | | | Year ended December 31, 2017 | | | Year ended December 31, 2016 | | | Year ended December 31, 2015 | Numerator: | | | | | | | | | | | | Net loss attributable to Navios Holdings common stockholders | | $ | (165,910) | | | $ | (303,823) | | | $ | (134,112) | Declared and undeclared dividend on preferred stock and on unvested restricted shares | | | (10,421) | | | | (15,909) | | | | (16,202) | Tender Offer – Redemption of preferred stock Series G and H including $972 and $5,063 of undeclared preferred dividend cancelled for the year ended December 31, 2017 and December 31, 2016, respectively | | | 1,033 | | | | 46,627 | | | | — | Loss available to Navios Holdings common stockholders, basic and diluted | | $ | (175,298) | | | $ | (273,105) | | | $ | (150,314) | | | | | | | Denominator: | | | | | | | | | | | | Denominator for basic and diluted net loss per share attributable to Navios Holdings stockholders — adjusted weighted shares | | | 116,673,459 | | | | 107,366,783 | | | | 105,896,235 | | | | | | | | | | | | | Basic and diluted net loss per share attributable to Navios Holdings stockholders | | $ | (1.50) | | | $ | (2.54) | | | $ | (1.42) | | | | | | | | | | | | |
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