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Favorable Lease Assets - Narrative (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets, amortization expense | $ 200,000us-gaap_AmortizationOfIntangibleAssets |  |
Impairment of favorable lease asset | 800,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill |  |
Off-Market Favorable Lease [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accumulated amortization | 2,700,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OffMarketFavorableLeaseMember |  | 3,000,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OffMarketFavorableLeaseMember
Boston Westin Waterfront [Member] | Above Market Lease Rights [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Impairment of favorable lease asset | 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember | 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_BostonWestinWaterfrontMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeaseRightsMember |
Lexington Hotel New York [Member] | Above Market Leases Ground [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Impairment of favorable lease asset | $ 800,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = drh_LexingtonHotelNewYorkMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = drh_AboveMarketLeasesGroundMember |  |
Minimum [Member] | Boston Westin Waterfront [Member] | Above Market Lease Rights [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of room hotel 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 |  |
Maximum [Member] | Boston Westin Waterfront [Member] | Above Market Lease Rights [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of room hotel 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 |  |

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- Definition Number of Room Hotel For Development For Which Favorable Lease Assets Are Owned + References No definition available. + Details
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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 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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