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Advances for vessels under construction and acquisition of vessels (Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Advances for vessels under construction and acquisition of vessels [Abstract]
Balance, period start	$ 59,900	$ 48,574
Additions	96,671	129,749
OCC Vessels shares acquisition	0	42,962
Capitalized interest	1,018	1,753
Transfers to Vessel cost	(157,589)	(163,138)
Balance, period end	$ 0	$ 59,900

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Value of stock issued in lieu of cash for the acquisition of three newbuilding Newcastlemax dry bulk vessels, from Oceanbulk Container Carriers LLC contributed to the entity.

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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Amount of interest capitalized during the period.

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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