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Stockholders equity and dividend payment, Stock repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021
Stock Repurchases [Abstract]
Share repurchases (in shares)	1,230,302	3,721,841
Aggregate consideration	$ 6,700	$ 22,500	$ 29,207
Average price (in dollars per share)	$ 5.466	$ 6.025

X

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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

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- Definition

Average price per share of shares repurchased in open market.

+ References

No definition available.

+ Details

Name:	dht_TreasuryStockPricePerShare
Namespace Prefix:	dht_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration