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Financial instruments - Derivatives Interest Rate Swaps (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Receive floating
Total carrying amount (notional amount)	$ 75,542	$ 127,604
Total carrying amount (fair value)	$ 545	$ 2,699
Swap expires Jun. 16, 2017 [Member]
Receive floating
Fixed Interest Rate		2.7775%
Notional amount		$ 21,438
Fair Value		$ 171
Swap expires Oct. 24, 2017 [Member]
Receive floating
Fixed Interest Rate		3.0275%
Notional amount		$ 22,458
Fair Value		$ 340
Swap expires Jun. 29, 2018 1 [Member]
Receive floating
Fixed Interest Rate	3.315%	3.315%
Notional amount	$ 19,396	$ 21,438
Fair Value	$ 156	$ 608
Swap expires Jun. 29, 2018 2 [Member]
Receive floating
Fixed Interest Rate	3.565%	3.565%
Notional amount	$ 20,417	$ 22,458
Fair Value	$ 187	$ 708
Swap expires Jun. 29, 2018 3 [Member]
Receive floating
Fixed Interest Rate	2.865%	2.865%
Notional amount	$ 35,729	$ 39,813
Fair Value	$ 202	$ 872

X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Fixed interest rate related to the swap.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Description of swaps which have a "receive floating" interest rate structure.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount specified by the swap(s). Expressed as an absolute value.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The total of the aggregate notional amount specified by the swap(s). Expressed as an absolute value.

+ References

No definition available.

+ Details

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X

- Definition

The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 8
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_8_e&doctype=Standard
-URIDate 2017-03-09

+ Details

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X

- Details

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X

- Details

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X

- Details

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- Details

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- Details

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