Charter arrangements, Future charter payments (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Charter arrangements [Abstract]
2022	$ 53,118
2023	16,785
2024	10,039
Thereafter	0
Net charter payments	79,942	$ 122,313	$ 91,556
Other income [Abstract]
Distribution of equity received	$ 4,612

No definition available.

Name:	dht_CharterArrangementsAbstract
Namespace Prefix:	dht_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of distribution of equity received by the entity during the period.

No definition available.

Name:	dht_DistributionOfEquityReceived
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of future charter payments due in the next fiscal year following the latest fiscal year.

No definition available.

Name:	dht_FutureCharterPaymentsDueCurrent
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of future charter payments due in the third fiscal year following the latest fiscal year.

No definition available.

Name:	dht_FutureCharterPaymentsDueInThreeYears
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of future charter payments due in the second fiscal year following the latest fiscal year.

No definition available.

Name:	dht_FutureCharterPaymentsDueInTwoYears
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of future charter payments due after the fifth fiscal year following the latest fiscal year.

No definition available.

Name:	dht_FutureCharterPaymentsDueThereafter
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Total amount of future charter payments.

No definition available.

Name:	dht_FutureCharterPaymentsTotal
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.

Name:	ifrs-full_AnalysisOfIncomeAndExpenseAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration