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Debt - Schedule of Debt Covenants (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Line Of Credit Facility Covenant Actual Results [Member] |
Line of Credit Facility [Line Items] |
Maximum leverage ratio | 0.348 us-gaap_RatioOfIndebtednessToNetCapital1 / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Minimum fixed charge coverage ratio | 2.85 drh_LineOfCreditFacilityMinimumFixedChargeCoverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Minimum tangible net worth | $ 2,454 drh_LineOfCreditFacilityMinimumTangibleNetWorth / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Secured recourse indebtedness | 34.80%drh_DebtInstrumentSecuredRecourseIndebtednessRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Line Of Credit Facility Covenant [Member] |
Line of Credit Facility [Line Items] |
Maximum leverage ratio | 0.60 us-gaap_RatioOfIndebtednessToNetCapital1 / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Minimum fixed charge coverage ratio | 1.50 drh_LineOfCreditFacilityMinimumFixedChargeCoverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Minimum tangible net worth | $ 1,904 drh_LineOfCreditFacilityMinimumTangibleNetWorth / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Secured recourse indebtedness | 45.00%drh_DebtInstrumentSecuredRecourseIndebtednessRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember

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- Definition Debt Instrument, Secured Recourse Indebtedness Ratio + References No definition available. + Details
Name: | drh_DebtInstrumentSecuredRecourseIndebtednessRatio
Namespace Prefix: | drh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line Of Credit Facility Minimum Fixed Charge Coverage Ratio + References No definition available. + Details
Name: | drh_LineOfCreditFacilityMinimumFixedChargeCoverageRatio
Namespace Prefix: | drh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Line Of Credit Facility Minimum Tangible Net Worth + References No definition available. + Details
Name: | drh_LineOfCreditFacilityMinimumTangibleNetWorth
Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Indebtedness divided by net capital. + References No definition available. + Details
Name: | us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | drh_LineOfCreditFacilityCovenantAxis=drh_LineOfCreditFacilityCovenantActualResultsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | drh_LineOfCreditFacilityCovenantAxis=drh_LineOfCreditFacilityCovenantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |