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Property and Equipment - Narrative (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Property, Plant and Equipment [Abstract] |  |
Accrued capital expenditures | $ 4.6drh_AccruedCapitalExpenditures | $ 6.2drh_AccruedCapitalExpenditures

X
- Definition Amount accrued for capital expenditures as of the balance sheet date. + References No definition available. + Details
Name: | drh_AccruedCapitalExpenditures
Namespace Prefix: | drh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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