Summary of Significant Accounting Policies - Subsidiaries (Table) (Details)
 12 Months Ended
Dec. 31, 2020
Navios Maritime Holdings Inc.  
Entity Information [Line Items]  
Nature Holding Company
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios South American Logistics Inc.  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 63.80%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Maritime Containers L.P.  
Entity Information [Line Items]  
Nature Holding Company
Ownership Interest 3.70%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 8/29
2018 11/30 - 12/31
Navios Corporation  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios International Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navimax Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Handybulk Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Hestia Shipping Ltd.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Malta
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Anemos Maritime Holdings Inc.  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Shipmanagement Inc.  
Entity Information [Line Items]  
Nature Management Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 12/31
2018 1/1 - 12/31
NAV Holdings Limited  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Malta
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Kleimar N.V.  
Entity Information [Line Items]  
Nature Operating Company/Vessel Owning Company/Management Company
Ownership Interest 100.00%
Country of Incorporation Belgium
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Kleimar Ltd.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 8/29
2018 1/1 - 12/31
Bulkinvest S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Luxembourg
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Primavera Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Ginger Services Co.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Aquis Marine Corp.  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Tankers Management Inc.  
Entity Information [Line Items]  
Nature Management Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 8/29
2018 1/1 - 12/31
Astra Maritime Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Achilles Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Apollon Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Herakles Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Hios Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Ionian Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Kypros Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Meridian Shipping Enterprises Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Mercator Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Arc Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Horizon Shipping Enterprises Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Magellan Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Aegean Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Star Maritime Enterprises Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Corsair Shipping Ltd.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Rowboat Marine Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Rondine Management Corp.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 9/30
2019 3/22 - 12/31
Vernazza Shiptrade Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 9/25 - 12/31
Navios Corporation Management Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 7/4 - 8/29
Beaufiks Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Nostos Shipmanagement Corp.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Portorosa Marine Corp.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Shikhar Ventures S.A.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Liberia
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Sizzling Ventures Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Liberia
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Rheia Associates Co.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Taharqa Spirit Corp.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Rumer Holding Ltd.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Pharos Navigation S.A.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Pueblo Holdings Ltd.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Quena Shipmanagement Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Aramis Navigation Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
White Narcissus Marine S.A.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Panama
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios GP L.L.C.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Red Rose Shipping Corp.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Highbird Management Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Ducale Marine Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Vector Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Faith Marine Ltd.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Liberia
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Maritime Finance (US) Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Delaware
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Maritime Finance II (US) Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Delaware
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Tulsi Shipmanagement Co.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Cinthara Shipping Ltd.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Rawlin Services Company  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Mauve International S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Serenity Shipping Enterprises Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Mandora Shipping Ltd  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Solange Shipping Ltd.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Diesis Ship Management Ltd.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Holdings Europe Finance Inc.  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Navios Asia LLC  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 12/31
2018 1/1 - 12/31
Iris Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Jasmine Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Emery Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Lavender Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Esmeralda Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2018 1/1 - 8/30
Triangle Shipping Corporation  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2018 1/1 - 8/30
Roselite Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Smaltite Shipping Corporation  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 12/31
2018 1/1 - 12/31
Motiva Trading Ltd.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Alpha Merit Corporation  
Entity Information [Line Items]  
Nature Sub-Holding Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Thalassa Marine S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/1 - 12/31
Asteroid Shipping S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/12 - 12/31
Cloud Atlas Marine S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 1/15 - 12/31
Heodor Shipping Inc.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 2/13 - 12/31
Navios Maritime Containers GP LLC  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 8/29
2018 9/11 - 12/31
Navios Containers Management Inc.  
Entity Information [Line Items]  
Nature Management Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2019 1/1 - 8/29
2018 1/1 - 12/31
Pacifico Navigation Corp.  
Entity Information [Line Items]  
Nature Vessel Owning Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 11/7 - 12/31
Rider Shipmanagement Inc.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 12/4 - 12/31
Talia Shiptrade S.A.  
Entity Information [Line Items]  
Nature Operating Company
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 1/1 - 12/31
2019 1/1 - 12/31
2018 10/11 - 12/31
Moonstone Shipping Corporation  
Entity Information [Line Items]  
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 6/30 – 12/31
Opal Shipping Corporation  
Entity Information [Line Items]  
Ownership Interest 100.00%
Country of Incorporation Marshall Is.
Statement of Operations  
2020 6/30 – 12/31