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Charter arrangements - Summary of vessel employment (Details)	12 Months Ended
	Dec. 31, 2017
DHT Amazon | VLCC
Vessel employment
Type of Employment	Time Charter
Expiry	Q4 2018
DHT Bauhinia | VLCC
Vessel employment
Type of Employment	Spot
DHT China | VLCC
Vessel employment
Type of Employment	Time Charter
Expiry	Q2 2021
DHT Condor | VLCC
Vessel employment
Type of Employment	Spot
DHT Edelweiss | VLCC
Vessel employment
Type of Employment	Spot
DHT Europe | VLCC
Vessel employment
Type of Employment	Time Charter
Expiry	Q1 2019
DHT Falcon | VLCC
Vessel employment
Type of Employment	Spot
DHT Hawk | VLCC
Vessel employment
Type of Employment	Spot
DHT Jaguar | VLCC
Vessel employment
Type of Employment	Spot
DHT Lake | VLCC
Vessel employment
Type of Employment	Spot
DHT Leopard | VLCC
Vessel employment
Type of Employment	Spot
DHT Lion | VLCC
Vessel employment
Type of Employment	Spot
DHT Lotus | VLCC
Vessel employment
Type of Employment	Spot
DHT Opal | VLCC
Vessel employment
Type of Employment	Spot
DHT Panther | VLCC
Vessel employment
Type of Employment	Spot
DHT Peony | VLCC
Vessel employment
Type of Employment	Time Charter
Expiry	Q4 2018
DHT Puma | VLCC
Vessel employment
Type of Employment	Spot
DHT Raven | VLCC
Vessel employment
Type of Employment	Spot
DHT Redwood | VLCC
Vessel employment
Type of Employment	Time Charter
Expiry	Q1 2018
DHT Scandinavia | VLCC
Vessel employment
Type of Employment	Spot
DHT Sundarbans | VLCC
Vessel employment
Type of Employment	Spot
DHT Taiga | VLCC
Vessel employment
Type of Employment	Spot
DHT Tiger | VLCC
Vessel employment
Type of Employment	Spot
DHT Utik | VLCC
Vessel employment
Type of Employment	Spot
DHT Cathy | Aframax
Vessel employment
Type of Employment	Time Charter
Expiry	Q2 2018
DHT Sophie | Aframax
Vessel employment
Type of Employment	Spot

X

- Definition

Lease Expiration Month Year

+ References

No definition available.

+ Details

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X

- Definition

Type of Employment

+ References

No definition available.

+ Details

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X

- Definition

Vessel Employment Abstract

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtAmazonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_VesselTypeAxis=dht_VLCCMember
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Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtBauhiniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtChinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtCondorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtEdelweissMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtEuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtFalconMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DHTHawkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtJaguarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtLakeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtLeopardMember
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Balance Type:
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X

- Details

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Balance Type:
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- Details

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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtOpalMember
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Balance Type:
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X

- Details

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X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtPeonyMember
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X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtPumaMember
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X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtRavenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtRedwoodMember
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Data Type:	na
Balance Type:
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X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtScandinaviaMember
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Balance Type:
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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtSundarbansMember
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Data Type:	na
Balance Type:
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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtTaigaMember
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Data Type:	na
Balance Type:
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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtTigerMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtUtikMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtCathyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dht_VesselTypeAxis=dht_AframaxMember
Namespace Prefix:
Data Type:	na
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Period Type:

X

- Details

Name:	dht_PropertySubjectToOrAvailableForOperatingLeaseAxis=dht_DhtSophieMember
Namespace Prefix:
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