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Relationship with Managers - Schedule of Management Fees (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Relationships with Managers [Abstract] |  |  |
Base management fees expense | $ 21,473 drh_BaseManagementFeesExpense | $ 19,324 drh_BaseManagementFeesExpense | $ 18,757 drh_BaseManagementFeesExpense
Incentive management fees expense | 8,554 drh_IncentiveManagementFeesExpense | 6,222 drh_IncentiveManagementFeesExpense | 5,550 drh_IncentiveManagementFeesExpense
Management fees | $ 30,027 us-gaap_OwnedPropertyManagementCosts | $ 25,546 us-gaap_OwnedPropertyManagementCosts | $ 24,307 us-gaap_OwnedPropertyManagementCosts

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- Definition Base Management 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 Incentive management fees expense + References No definition available. + Details
Name: | drh_IncentiveManagementFeesExpense
Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | drh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The aggregate costs related to management of owned properties during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration