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Financial risk management, objectives and policies, Market risk (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Swap	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Market risk [Abstract]
Number of interest rate swaps | Swap	9
Interest rate swaps total aggregate notional amount	$ 357,141	$ 379,916
Increase (decrease) in profit (loss) due to change in interest rates by fifty basis points	$ (488)	$ (1,805)	$ (2,152)

X

- Definition

The amount of increase (decrease) in profit (loss) due to change in interest rates by fifty basis points.

+ References

No definition available.

+ Details

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X

- References

No definition available.

+ Details

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X

- Definition

The number of interest rate swaps.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

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