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Fair Value Measurements and Hedging - Derivative instruments effect on statement of operations (Table) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Interest and finance costs |  |
Reclassification adjustments of interest rate swap loss/(gain) transferred to Interest and finance costs from Other comprehensive income/(loss) (Note 7) | $ (998) | $ 492
Total Gain/(loss) recognized | (998) | 492
Gain/(loss) on forward freight agreements and bunker swaps, net |  |
Total Gain/(loss) recognized | (1,537) | 19,532
Forward Freight Agreements [Member] |  |
Gain/(loss) on forward freight agreements and bunker swaps, net |  |
Realized gain/(loss) on forward freight agreements and freight options | (39) | 11,635
Unrealized gain/(loss) on forward freight agreements and freight options | (1,560) | (12,555)
Bunker Swaps [Member] |  |
Gain/(loss) on forward freight agreements and bunker swaps, net |  |
Realized gain/(loss) on bunker swaps | 58 | 7,957
Unrealized gain/(loss) on bunker swaps | $ 4 | $ 12,495

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- Definition The realized gain / (loss) of bunker swaps agreements, held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
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