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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 | $ 3,000,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | $ 6,800,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization |
Favorable lease assets, net | 34,274,000 us-gaap_IntangibleAssetsNetExcludingGoodwill | 39,936,000 us-gaap_IntangibleAssetsNetExcludingGoodwill |
Finite-lived intangible assets, amortization expense | 700,000 us-gaap_AmortizationOfIntangibleAssets | 1,000,000 us-gaap_AmortizationOfIntangibleAssets | 1,000,000 us-gaap_AmortizationOfIntangibleAssets
Amortization in 2015 | 600,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |  |
Amortization in 2016 | 500,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |  |
Amortization in 2017 | 400,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |  |
Amortization in 2018 | 400,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |  |
Amortization in 2019 | 400,000 us-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 | 18,293,000 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 18,510,000 us-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 | 5,760,000 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonMinneapolisMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 5,835,000 us-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 | 1,031,000 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_LexingtonHotelNewYorkMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 1,176,000 us-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 | 145,000 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_HiltonBostonDowntownMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 312,000 us-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 | 0 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember | 5,058,000 us-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 | 9,045,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember | 9,045,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember |
Impairment of favorable lease asset |  | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember | 500,000 us-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) | 320 drh_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) | 350 drh_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 | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember |  | 1,400,000 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember
Fair value of ground lease | $ 5,600,000 us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure / us-gaap_BusinessAcquisitionAxis = drh_OakBrookHillsResortMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Accumulated amount of 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 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. + 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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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 The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + 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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