Transactions with Related Parties - Statements of Operations (Table) (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Related Party Transaction [Line Items]
Voyage expenses	$ 93,045	$ 115,072
Consultancy fees	(267)	(327)
Directors compensation	(91)	(87)
General and administrative expenses	(17,427)	(14,991)
Management fees	(9,605)	(9,202)
Charter - in hire expenses	(7,342)	(14,053)
Interchart [Member]
Related Party Transaction [Line Items]
Voyage expenses	(1,890)	(1,890)
Augustea Technoservices Ltd and affiliates [Members]
Related Party Transaction [Line Items]
Voyage expenses	(165)	(0)
Management fees	(3,258)	(3,276)
Hartree Marine Fuels LLC [Member]
Related Party Transaction [Line Items]
Voyage expenses	(4,576)	(0)
Combine Marine Ltd. and Alma Properties [Member]
Related Party Transaction [Line Items]
Office rent	(21)	(19)
Oceanbulk Maritime and its affiliates [Member]
Related Party Transaction [Line Items]
General and administrative expenses	(101)	(143)
AOM [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	(4,054)	(1,654)
Sydelle [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	0	(540)
Coromel [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	$ 0	$ (249)

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

No definition available.

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- Definition

Expenditures for compensation for non executive officers.Examples include, but not limited to, Board of Director's attendance fees.

+ References

No definition available.

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- Definition

Costs relating to the voyages performed by the vessels and may include port, canal, bunker expenses, commissions and other.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

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- Definition

Professional and contract service expense includes cost reimbursements for support services related to contracted projects, outsourced management, technical and staff support.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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