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