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Deferred Charges, net (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Changes in deferred charges, net |  |  |  |  |
Balance at the beginning of the period |  |  | $ 11,801 |  |
Amortization | $ (3,202) | $ (2,545) | (5,922) | $ (5,054) |
Balance at the end of the period | 15,605 |  | 15,605 |  | $ 11,801
Drydocking and Special Survey Costs |  |  |  |  |
Changes in deferred charges, net |  |  |  |  |
Balance at the beginning of the period |  |  | 11,801 | $ 17,339 | 17,339
Additions |  |  | 9,726 |  | 4,643
Amortization |  |  | (5,922) |  | (10,181)
Balance at the end of the period | $ 15,605 |  | $ 15,605 |  | $ 11,801
Period of amortization for deferred costs |  |  | 2 years 6 months |  |

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