The amount of adjusted tangible net worth required to be maintained to fulfill Credit facility covenant.

No definition available.

Name:	dht_CreditFacilityCovenantRequiredAdjustedTangibleNetWorth
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of adjusted tangible net worth to adjusted total assets value required to be maintained to fulfill Credit facility covenant.

+ References

No definition available.

+ Details

Name:	dht_CreditFacilityCovenantRequiredPercentageOfAdjustedTangibleNetWorthToTotalAssets
Namespace Prefix:	dht_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of unencumbered consolidated cash to gross interest bearing debt required to be maintained to fulfill credit facility covenant.

+ References

No definition available.

+ Details

Name:	dht_CreditFacilityCovenantRequiredPercentageOfUnencumberedConsolidatedCashToGrossInterestBearingDebt
Namespace Prefix:	dht_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of unencumbered consolidated cash required to be maintained to fulfill Credit facility covenant.

+ References

No definition available.

+ Details

Name:	dht_CreditFacilityCovenantRequiredUnencumberedConsolidatedCash
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Refers to the required percentage of the charter-free market value of the vessels to the borrowings under the covenants of the credit facility.

+ References

No definition available.

+ Details

Name:	dht_CreditFacilityCovenantsPercentageOfCharterFreeMarketValueOfVesselsToBorrowings
Namespace Prefix:	dht_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period between issuance and maturity of credit facility, period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	dht_CreditFacilityTerm
Namespace Prefix:	dht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic installment payments including both interest and principal payments.

+ References

No definition available.

+ Details

Name:	dht_DebtInstrumentPeriodicInstallmentPayment
Namespace Prefix:	dht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of prepayment of debt for final settlement.

+ References

No definition available.

+ Details

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

- Definition

The description of the frequency of periodic repayment of credit facility.

+ References

No definition available.

+ Details

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

- Definition

Number of newbuilding contracts during the period..

+ References

No definition available.

+ Details

Name:	dht_NumberOfNewbuildingContracts
Namespace Prefix:	dht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of VLCCs delivered during the period.

+ References

No definition available.

+ Details

Name:	dht_NumberOfVLCCsDelivered
Namespace Prefix:	dht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of Commitment funding that the entity is obligated to repay towards financing activities.

+ References

No definition available.

+ Details

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

- Definition

The amount of voluntary prepayment of debt before installment term.

+ References

No definition available.

+ Details

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

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_BorrowingsByNameAxis=dht_NordeaCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CreationDateAxis=dht_PeriodElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=dht_LondonInterbankOfferedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=dht_ScrubbersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_BuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financial risk management, objectives and policies, Nordea Credit Facility (Details) $ in Thousands		1 Months Ended					12 Months Ended
	Nov. 30, 2020 USD ($)	Aug. 31, 2020 USD ($)	May 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2017 USD ($) Carrier	Apr. 30, 2017 USD ($) Building	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Nov. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Aug. 31, 2018	Jun. 30, 2018 USD ($)
Credit Facility [Abstract]
Borrowing amount							$ 449,959	$ 850,972
Nordea Credit Facility [Member]
Credit Facility [Abstract]
Term							6 years
Borrowing amount					$ 204,000	$ 300,000	$ 109,423	$ 207,175				$ 96,000
Number of VLCCs Delivered \| Carrier					9
Credit facility covenant, required adjusted tangible net worth							$ 300,000
Frequency of periodic repayment							Quarterly
Debt repayment installment amount							$ 4,200
Debt prepayment before installment term	$ 25,800	$ 37,000	$ 25,800	$ 35,000
Nordea Credit Facility [Member] \| Bottom of Range [Member]
Credit Facility [Abstract]
Credit facility covenant, required percentage of charter-free market value of vessels to borrowings							135.00%
Credit facility covenant, required percentage of adjusted tangible net worth to total assets							25.00%
Credit facility covenant, required unencumbered consolidated cash							$ 30,000
Credit facility covenant, required percentage of unencumbered consolidated cash to gross interest bearing debt							6.00%
Nordea Credit Facility [Member] \| Second Quarter of 2023 [Member]
Credit Facility [Abstract]
Debt repayment final amount							$ 82,300
Nordea Credit Facility [Member] \| LIBOR [Member]
Credit Facility [Abstract]
Adjustment to interest rate basis							2.40%					2.40%
Nordea Credit Facility [Member] \| Scrubbers [Member]
Credit Facility [Abstract]
Frequency of periodic repayment							Quarterly
Debt repayment installment amount							$ 2,250
Secured commitment related to financing									$ 45,000	$ 50,000
Nordea Credit Facility [Member] \| Scrubbers [Member] \| Second Quarter of 2023 [Member]
Credit Facility [Abstract]
Debt repayment final amount							$ 18,000
Nordea Credit Facility [Member] \| Scrubbers [Member] \| LIBOR [Member]
Credit Facility [Abstract]
Adjustment to interest rate basis											2.40%
Nordea Credit Facility [Member] \| New Buildings [member]
Credit Facility [Abstract]
Number of newbuilding contracts \| Building						2