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v3.21.2

Long-term debt, current and non-current, textuals 2 (Details) $ in Thousands |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 21, 2021 USD ($) | May 20, 2021 | Mar. 30, 2015 USD ($) | Jun. 30, 2021 USD ($) installment item | Dec. 31, 2020 USD ($) item
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | LIBOR plus margin |
Number Of Vessels Collateral For Debt | item |  |  |  | 30 | 30
Debt Instrument Collateral Amount |  |  |  | $ 615,327 |
Minimum cash deposits required to be maintained |  |  |  | $ 18,500 | $ 20,000
Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loan Margin Percentage |  |  |  | 2.15% |
Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loan Margin Percentage |  |  |  | 2.50% |
Export-Import Bank of China and DnB NOR Bank ASA [Member] | Secured Debt [Member] | First Tranche [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Issuance Date |  |  |  | Feb. 15, 2012 |
Proceeds From Issuance Of Secured Debt |  |  |  | $ 37,450 |
Debt Instrument, Number of installments | installment |  |  |  | 40 |
Debt Instrument, Frequency of Periodic Payments |  |  |  | quarterly |
Debt Instrument, Periodic Payment, Principal |  |  |  | $ 628 |
Debt Instrument, Balloon Payment |  |  |  | $ 12,332 |
Debt Instrument, Maturity Date |  |  |  | Feb. 15, 2022 |
Export-Import Bank of China and DnB NOR Bank ASA [Member] | Secured Debt [Member] | Second Tranche [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Issuance Date |  |  |  | May 18, 2012 |
Proceeds From Issuance Of Secured Debt |  |  |  | $ 34,640 |
Debt Instrument, Number of installments | installment |  |  |  | 40 |
Debt Instrument, Frequency of Periodic Payments |  |  |  | quarterly |
Debt Instrument, Periodic Payment, Principal |  |  |  | $ 581 |
Debt Instrument, Balloon Payment |  |  |  | $ 11,410 |
Debt Instrument, Maturity Date |  |  |  | May 18, 2022 |
Loan Margin Percentage |  |  |  | 2.50% |
ABN AMRO Bank N.V. [Member] | Secured Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds From Issuance Of Secured Debt | $ 91,000 |  | $ 50,160 |  |
Debt Instrument, Number of installments | installment |  |  |  | 24 |
Debt Instrument, Frequency of Periodic Payments |  |  |  | quarterly |
Debt Instrument, Periodic Payment, Principal |  |  |  | $ 994 |
Debt Instrument, Balloon Payment |  |  |  | $ 26,310 |
Debt Instrument, Maturity Date |  |  |  | May 20, 2026 |
Debt Instrument, Description of Variable Rate Basis |  | LIBOR |  | LIBOR |
Loan Margin Percentage |  |  |  | 2.00% |

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