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v3.21.2

Property and equipment, net (Tables) | 6 Months Ended
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Jun. 30, 2021
Property and equipment, net [Abstract] |
Schedule Of Property And Equipment [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Property and | ​ | Accumulated | ​ | ​ | ​
​ |  | Equipment |  | Depreciation |  | Net Book Value
Balance, December 31, 2020 | ​ | $ | 27,198 | ​ | $ | (5,494) | ​ | $ | 21,704
- Additions in property and equipment | ​ |  | 149 | ​ |  | — | ​ |  | 149
- Depreciation for the period | ​ |  | — | ​ |  | (224) | ​ |  | (224)
Balance, June 30, 2021 | ​ | $ | 27,347 | ​ | $ | (5,718) | ​ | $ | 21,629

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- References No definition available. + Details
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Namespace Prefix: | dsx_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition The movement of the property and equipment, accumulated depreciation and net book value. + References No definition available. + Details
Name: | dsx_ScheduleOfPropertyAndEquipmentTableTextBlock
Namespace Prefix: | dsx_
Data Type: | nonnum:textBlockItemType
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Period Type: | duration