XML 75 R62.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Pensions - Year s Pension Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Calculation Of This Years Pension Costs [Abstract] |  |  |
Current service cost | $ 329 | $ 344 | $ 289
Financial costs | 6 | 6 | 6
Pension costs for the year | $ 335 | $ 350 | $ 296

X
- Definition The calculation of the year's pension costs [Abstract]. + References No definition available. + Details
Name: | dht_CalculationOfThisYearsPensionCostsAbstract
Namespace Prefix: | dht_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financial costs to the defined benefit plan. + References No definition available. + Details
Name: | dht_DefinedBenefitPlanFinancialCosts
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References No definition available. + Details
Name: | dht_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References No definition available. + Details
Name: | dht_DefinedBenefitPlanServiceCost
Namespace Prefix: | dht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration