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Condensed Financial Information of DHT Holdings, Inc. - Equity Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Equity Reconciliation [Abstract] |  |
Equity of the parent company only under cost method of accounting | $ 1,037,838 | $ 708,228
Additional profit if subsidiaries had been accounted for using equity method of accounting as opposed to cost method of accounting | (16,253) | (2,588)
Equity of the parent company only under equity method of accounting | $ 1,021,586 | $ 705,640

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- Definition The additional profit if subsidiaries had been accounted for using equity method of accounting as opposed to cost method of accounting. + References No definition available. + Details
Name: | dht_AdditionalProfitIfSubsidiariesHadBeenAccountedForUsingEquityMethodOfAccountingAsOpposedToCostMethodOfAccounting
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The equity of the parent company only under cost method of accounting. + References No definition available. + Details
Name: | dht_EquityOfTheParentCompanyOnlyUnderCostMethodOfAccounting
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The equity of the parent company only under equity method of accounting. + References No definition available. + Details
Name: | dht_EquityOfTheParentCompanyOnlyUnderEquityMethodOfAccounting
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The disclosure of equity reconciliation. + References No definition available. + Details
Name: | dht_EquityReconciliationAbstract
Namespace Prefix: | dht_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration