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Transactions with Related Parties, textual (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Due to related parties, current	$ 745		$ 484
Income / (loss) from Investments	(198)	$ (86)
Cash dividends on preferred stock	2,884	2,884
Altair Travel Agency S.A. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	827	395
Due to related parties, current	256		54
Steamship Shipbroking Enterprises Inc [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	1,654	$ 999
Due to related parties, current	$ 0		$ 0

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- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Amount of realized and unrealized gain (loss) on investment.

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