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Income Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2014
Income Tax Contingency [Line Items] |  |
Franchise tax expense classified as corporate expenses | $ 0.4 drh_FranchiseTaxExpense |
Deferred tax assets expected to be recovered against reversing taxable temporary differences |  | 9.3 drh_DeferredTaxAssetAnticipatedRecovery
Deferred tax assets dependent upon future taxable earnings of TRS |  | 31.2 drh_DeferredTaxAssetsDependentOnSubsidiaryFutureTaxableEarnings
Frenchman's Reef and Morning Star Marriott Beach [Member] |  |
Income Tax Contingency [Line Items] |  |
New adjusted tax rate after the reduction (as a percent) |  | 7.00%drh_NewAdjustedTaxRateAfterReduction / us-gaap_RealEstatePropertiesAxis = drh_FrenchmansReefandMorningStarMarriottBeachMember
Frenchman's Reef and Morning Star Marriott Beach [Member] | US Virgin Islands [Member] |  |
Income Tax Contingency [Line Items] |  |
Percentage of income tax rate if the agreement is not extended (as a percent) |  | 37.40%drh_EffectiveIncomeTaxRateIfAgreementNotExtended / us-gaap_RealEstatePropertiesAxis = drh_FrenchmansReefandMorningStarMarriottBeachMember / us-gaap_StatementGeographicalAxis = country_VI

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- Definition Deferred Tax Asset Anticipated Recovery + References No definition available. + Details
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Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Deferred Tax Assets Dependent on Subsidiary Future Taxable Earnings + References No definition available. + Details
Name: | drh_DeferredTaxAssetsDependentOnSubsidiaryFutureTaxableEarnings
Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Effective Income Tax Rate If Agreement Not Extended + References No definition available. + Details
Name: | drh_EffectiveIncomeTaxRateIfAgreementNotExtended
Namespace Prefix: | drh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Franchise Tax Expense + References No definition available. + Details
Name: | drh_FranchiseTaxExpense
Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition New adjusted tax rate after the reduction + References No definition available. + Details
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Namespace Prefix: | drh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RealEstatePropertiesAxis=drh_FrenchmansReefandMorningStarMarriottBeachMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |