Vessels and subsidiaries - Time charter contracts (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Time charter contracts
Total carrying amount	$ 2,407	$ 3,385
DHT China charter [Member]
Time charter contracts
Finite	$ 2,407	$ 3,385

Description and carrying amount of intangible assets with finite useful life.

No definition available.

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