Acquisitions, Pro Forma Information (Details) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 17, 2011	Jun. 18, 2010	Jun. 17, 2011	Jun. 18, 2010
Pro Forma Operating Information
Revenues	$ 186,625	$ 184,404	$ 316,737	$ 313,550
Net (loss) income	$ 888	$ 4,403	$ (12,282)	$ (6,892)
(Loss) earnings per share - Basic and Diluted	$ 0.01	$ 0.03	$ (0.07)	$ (0.05)

Business Acquisition ProForma Earnings Per Share Basic And Diluted.

Name:	drh_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted
Namespace Prefix:	drh
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionProFormaInformationAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionsProFormaRevenue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration