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Commitments and Contingencies - Additional Information (Details) (USD $) | 12 Months Ended | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 Hotel | Dec. 31, 2013 | Dec. 31, 2012 | May 31, 2014 | Sep. 30, 2014
Real Estate Properties [Line Items] |  |  |  |  |
Gain related to settlement amount | $ 10,999,000 us-gaap_GainLossRelatedToLitigationSettlement | $ 0 us-gaap_GainLossRelatedToLitigationSettlement | $ 0 us-gaap_GainLossRelatedToLitigationSettlement |  |
Number of properties subject to ground leases (in hotels) | 5 us-gaap_NumberOfPropertiesSubjectToGroundLeases |  |  |  |
Ground rent expense | 15,000,000 us-gaap_LeaseAndRentalExpense | 15,000,000 us-gaap_LeaseAndRentalExpense | 14,600,000 us-gaap_LeaseAndRentalExpense |  |
Cash paid for ground rent | 8,900,000 us-gaap_PaymentsForRent | 8,500,000 us-gaap_PaymentsForRent | 8,200,000 us-gaap_PaymentsForRent |  |
Bethesda Marriott Suites [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) | 0 drh_NumberOfPropertiesSubjectToGroundLeasesNumberOfRenewalPeriods / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_BethesdaMarriottSuitesMember |  |  |  |
Courtyard Manhattan / Fifth Avenue [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) | 1 drh_NumberOfPropertiesSubjectToGroundLeasesNumberOfRenewalPeriods / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_CourtyardManhattanFifthAvenueMember |  |  |  |
Ground leases renewal option (in years) | 49 years |  |  |  |
Marriott Salt Lake City Downtown [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties subject to ground leases (in hotels) | 2 us-gaap_NumberOfPropertiesSubjectToGroundLeases / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_MarriottSaltLakeCityDowntownMember |  |  |  |
Interest in land under hotel (as a percent of ownership) | 21.00%drh_InterestInLandUnderHotel / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_MarriottSaltLakeCityDowntownMember |  |  |  |
Boston Westin Waterfront [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) | 0 drh_NumberOfPropertiesSubjectToGroundLeasesNumberOfRenewalPeriods / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_BostonWestinWaterfrontMember |  |  |  |
Hilton Minneapolis [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) | 0 drh_NumberOfPropertiesSubjectToGroundLeasesNumberOfRenewalPeriods / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_HiltonMinneapolisMember |  |  |  |
Renaissance Worthington [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties subject to ground leases (in hotels) | 3 us-gaap_NumberOfPropertiesSubjectToGroundLeases / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_RenaissanceWorthingtonMember |  |  |  |
Number of renewal periods (in ones) | 3 drh_NumberOfPropertiesSubjectToGroundLeasesNumberOfRenewalPeriods / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_RenaissanceWorthingtonMember |  |  |  |
Ground leases renewal option (in years) | 15 years |  |  |  |
Percentage of land on which the parking garage is constructed | 25.00%drh_PercentageOfLandOnWhichParkingGarageIsConstructed / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_RenaissanceWorthingtonMember |  |  |  |
Boston Westin Waterfront [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Settlement amount |  |  |  | 14,000,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = drh_BostonWestinWaterfrontMember |
Gain related to settlement amount |  |  |  | 11,000,000 us-gaap_GainLossRelatedToLitigationSettlement / us-gaap_LitigationCaseAxis = drh_BostonWestinWaterfrontMember |
Contingency fee paid |  |  |  | 1,200,000 us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = drh_BostonWestinWaterfrontMember |
Corporate and Other Expenses [Member] | Boston Westin Waterfront [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Legal fees |  |  |  |  | $ 1,800,000 us-gaap_LegalFees / us-gaap_IncomeStatementLocationAxis = drh_CorporateandOtherExpensesMember / us-gaap_LitigationCaseAxis = drh_BostonWestinWaterfrontMember

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