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Commitments and Contingencies - Income Taxes (Details) (U.S. Virgin Island, Foreign Tax Authority [Member]) | 3 Months Ended
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Mar. 31, 2015
U.S. Virgin Island | Foreign Tax Authority [Member] |
Income Tax Contingency [Line Items] |
Income tax agreement raate | 7.00%drh_IncomeTaxAgreementIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_IncomeTaxAuthorityNameAxis = country_VI
Statutory tax rate | 37.40%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_IncomeTaxAuthorityNameAxis = country_VI

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- Definition Income Tax Agreement, Income Tax Rate + References No definition available. + Details
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Namespace Prefix: | drh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration