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Favorable Lease Assets (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Favorable lease assets, net | $ 33,338us-gaap_IntangibleAssetsNetExcludingGoodwill | $ 34,274us-gaap_IntangibleAssetsNetExcludingGoodwill
Above Market Leases Ground [Member] | Boston Westin Waterfront [Member] |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease right | 18,239us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 18,293us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Leases Ground [Member] | Hilton Minneapolis [Member] |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease right | 5,741us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonMinneapolisMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 5,760us-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 right | 209us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_LexingtonHotelNewYorkMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 1,031us-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 right | 104us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonBostonDowntownMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 145us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonBostonDowntownMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember
Above Market Lease Rights [Member] | Boston Westin Waterfront [Member] |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Nonamortizable intangible asset | $ 9,045us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember | $ 9,045us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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