Transactions with related parties - Income Statements (Table) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Direct Operating Costs	$ (266,225)	$ (253,843)	$ (286,534)
General and Administrative Expense	(70,778)	(54,413)	(56,826)
Income (Loss) from Equity Method Investments	(4)	60	109
Interchart [Member]
Related Party Transaction [Line Items]
Direct Operating Costs	(4,140)	(4,140)	(4,140)
Income (Loss) from Equity Method Investments	(19)	31	59
Management and Directors fees [Member]
Related Party Transaction [Line Items]
Consultancy fees	(789)	(569)	(543)
Directors compensation	(172)	(201)	(185)
Combine Marine Ltd. and Alma Properties [Member]
Related Party Transaction [Line Items]
Operating Lease, Expense	(38)	(38)	(37)
Oceanbulk Maritime and its affiliates [Member]
Related Party Transaction [Line Items]
General and Administrative Expense	(130)	(176)	(179)
Augustea Technoservices Ltd. and affiliates [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	0	0	(1,250)
Iblea Ship Management Limited and its affiliates [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	(2,575)	(2,728)	(3,264)
Starocean [Member]
Related Party Transaction [Line Items]
Income (Loss) from Equity Method Investments	$ 15	$ 29	$ 50

The fees related to receiving management consultancy services during the reporting period.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of operating lease expense. Excludes sublease income.

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Amount of transactions with related party during the financial reporting period.

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