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Capital Stock and Changes in Capital Accounts, textuals 1 (Details) - Restricted Stock [Member] - USD ($) $ in Thousands |  |  | 6 Months Ended
--- | --- | --- | ---
Feb. 24, 2021 | Feb. 18, 2021 | Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock Incentive Plan, Number of Shares Authorized | 5,600,000 |  |
Vesting period (in years) | 5 years |  |
Fair value, grant date | $ 15,904 |  |
Executive Management And Non-Executive Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock Incentive Plan, Number of Shares Authorized | 2,400,000 | 260,000 |
Common Stock Capital Shares Reserved For Future Issuance |  |  | 16,664,759
Vesting period (in years) |  |  | 3 years
Fair value, grant date | $ 6,816 | $ 798 |

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