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Vessels and subsidiaries - Time charter contracts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Time charter contracts |  |
Total carrying amount | $ 2,407 | $ 3,385
DHT China charter [Member] |  |
Time charter contracts |  |
Finite | $ 2,407 | $ 3,385

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- Definition Description and carrying amount of intangible assets with finite useful life. + References No definition available. + Details
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Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Time charter contracts + References No definition available. + Details
Name: | dht_TimeCharterContractsAbstract
Namespace Prefix: | dht_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total carrying amount of intangible assets with finite useful life. + References No definition available. + Details
Name: | dht_TotalCarryingAmountOfIntangibleAssetsWithFiniteUsefulLife
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | dht_IntangibleAssetsWithFiniteUsefulLifeAxis=dht_DHTChinaCharterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |