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Relationship with Managers - Narrative (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 Hotel | Dec. 31, 2013 Hotel | Dec. 31, 2012 Hotel
Real Estate Properties [Line Items] |  |  |
Number of hotels that earned incentive management fees | 10 drh_NumberOfHotelsEarnedIncentiveManagementFees | 8 drh_NumberOfHotelsEarnedIncentiveManagementFees | 5 drh_NumberOfHotelsEarnedIncentiveManagementFees
Amortization | $ 1,090,000 us-gaap_RecognitionOfDeferredRevenue | $ 2,150,000 us-gaap_RecognitionOfDeferredRevenue | $ 999,000 us-gaap_RecognitionOfDeferredRevenue
Franchise fees expense | 15,300,000 drh_FranchiseFeesExpense | 11,400,000 drh_FranchiseFeesExpense | 8,400,000 drh_FranchiseFeesExpense
Key Money [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Amortization | 1,100,000 us-gaap_RecognitionOfDeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = drh_KeyMoneyIncentiveArrangementMember | 2,200,000 us-gaap_RecognitionOfDeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = drh_KeyMoneyIncentiveArrangementMember | 1,000,000 us-gaap_RecognitionOfDeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = drh_KeyMoneyIncentiveArrangementMember
Key Money [Member] | Oak Brook Hills Resort [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Amortization |  | 1,100,000 us-gaap_RecognitionOfDeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = drh_KeyMoneyIncentiveArrangementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_OakBrookHillsResortMember |
Key Money [Member] | Marriott Los Angeles Airport [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Amortization |  | $ 1,100,000 us-gaap_RecognitionOfDeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = drh_KeyMoneyIncentiveArrangementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_MarriottLosAngelesAirportMember |

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- Definition Franchise fees expense + References No definition available. + Details
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Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number of Hotels, Earned Incentive Management Fees + References No definition available. + Details
Name: | drh_NumberOfHotelsEarnedIncentiveManagementFees
Namespace Prefix: | drh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

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- Definition The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A -Subsection 1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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