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Favorable Lease Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Indefinite-lived Intangible Assets by Major Class [Line Items]
Accumulated amortization	$ 3,000,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization	$ 6,800,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Favorable lease assets, net	34,274,000us-gaap_IntangibleAssetsNetExcludingGoodwill	39,936,000us-gaap_IntangibleAssetsNetExcludingGoodwill
Finite-lived intangible assets, amortization expense	700,000us-gaap_AmortizationOfIntangibleAssets	1,000,000us-gaap_AmortizationOfIntangibleAssets	1,000,000us-gaap_AmortizationOfIntangibleAssets
Amortization in 2015	600,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Amortization in 2016	500,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Amortization in 2017	400,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Amortization in 2018	400,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Amortization in 2019	400,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Above Market Leases Ground [Member] | Boston Westin Waterfront Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease	18,293,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember	18,510,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Leases Ground [Member] | Minneapolis Hilton Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease	5,760,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonMinneapolisMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember	5,835,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonMinneapolisMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Leases Ground [Member] | Lexington Hotel New York [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease	1,031,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_LexingtonHotelNewYorkMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember	1,176,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_LexingtonHotelNewYorkMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Leases Ground [Member] | Hilton Boston Downtown [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease	145,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonBostonDowntownMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember	312,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonBostonDowntownMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Leases Ground [Member] | Oak Brook Hills Resort [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease	0us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember	5,058,000us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Lease Rights [Member] | Boston Westin Waterfront Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Nonamortizable intangible asset	9,045,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember	9,045,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember
Impairment of favorable lease asset		0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember	500,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember
Above Market Lease Rights [Member] | Boston Westin Waterfront Ground Lease [Member] | Minimum [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Number of room hotels for development for which favorable lease assets are owned (in rooms)	320drh_NumberOfRoomHotelForDevelopmentForWhichFavorableLeaseAssetsAreOwned / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Above Market Lease Rights [Member] | Boston Westin Waterfront Ground Lease [Member] | Maximum [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Number of room hotels for development for which favorable lease assets are owned (in rooms)	350drh_NumberOfRoomHotelForDevelopmentForWhichFavorableLeaseAssetsAreOwned / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Above Market Lease Rights [Member] | Oak Brook Hills Resort [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Impairment of favorable lease asset	0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember		1,400,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember
Fair value of ground lease	$ 5,600,000us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

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