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Debt (Schedule of Debt Covenants) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Line Of Credit Facility Covenant [Member] |
Line of Credit Facility [Line Items] |
Maximum Leverage Ratio (as a percent) | 0.60drh_LineOfCreditFacilityMaximumLeverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Minimum fixed charge coverage ratio | 1.50drh_LineOfCreditFacilityMinimumFixedChargeCoverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Minimum tangible net worth | $ 1,910drh_LineOfCreditFacilityMinimumTangibleNetWorth / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Secured recourse indebtedness ratio | 45.00%drh_DebtInstrumentSecuredRecourseIndebtednessRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantMember
Line Of Credit Facility Covenant Actual Results [Member] |
Line of Credit Facility [Line Items] |
Maximum Leverage Ratio (as a percent) | 0.340drh_LineOfCreditFacilityMaximumLeverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Minimum fixed charge coverage ratio | 3.06drh_LineOfCreditFacilityMinimumFixedChargeCoverageRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Minimum tangible net worth | $ 2,471drh_LineOfCreditFacilityMinimumTangibleNetWorth / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember
Secured recourse indebtedness ratio | 34.00%drh_DebtInstrumentSecuredRecourseIndebtednessRatio / drh_LineOfCreditFacilityCovenantAxis = drh_LineOfCreditFacilityCovenantActualResultsMember

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- Definition Debt Instrument, Secured Recourse Indebtedness Ratio + 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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- Definition Line of credit facility maximum leverage ratio + References No definition available. + Details
Name: | drh_LineOfCreditFacilityMaximumLeverageRatio
Namespace Prefix: | drh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |