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Stockholders' equity and dividend payment, Stock repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Stock Repurchases [Abstract] |  |  |  |  |  |
Share repurchases (in shares) | 1,499,608 | 2,826,771 | 1,230,302 | 3,721,841 |  |
Aggregate consideration | $ 8,800 | $ 15,900 | $ 6,700 | $ 22,500 | $ 24,758 | $ 29,207
Average price (in dollars per share) | $ 5.87 | $ 5.63 | $ 5.47 | $ 6.02 |  |

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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References No definition available. + Details
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Namespace Prefix: | dht_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | dht_StockRepurchaseAbstract
Namespace Prefix: | dht_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Average price per share of shares repurchased in open market. + References No definition available. + Details
Name: | dht_TreasuryStockPricePerShare
Namespace Prefix: | dht_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_106_d&doctype=Standard -URIDate 2022-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
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