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Long-term bank loans - Interest and finance costs (Table) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Debt Disclosure [Abstract] |  |
Interest on financing agreements | $ 24,028 | $ 33,818
Reclassification adjustments of interest rate swap loss/(gain) transferred to Interest and finance costs from Other Comprehensive Income (Note 12) | 998 | (492)
Amortization of debt (loan, lease & notes) issuance costs | 3,606 | 3,663
Other bank and finance charges | 827 | 1,392
Interest and finance costs | $ 29,459 | $ 38,381

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