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Stockholders' equity and dividend payment, Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Stock Repurchases [Abstract] |  |  |
Share repurchases (in shares) | 1,481,383 | 2,209,927 | 4,326,379
Percentage of outstanding shares | 0.90% |  |
Aggregate consideration | $ 13,196 | $ 18,808 | $ 24,758
Average price (in dollars per share) | $ 8.89 | $ 8.49 | $ 5.71

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- Definition The percentage of shares that have been repurchased during the period and are being held in treasury. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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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
Name: | dht_PurchaseOfTreasuryStock
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
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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 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration