Debt Instrument, Debt Service Coverage Ratio, Minimum

No definition available.

Name:	drh_DebtInstrumentDebtServiceCoverageRatioMinimum
Namespace Prefix:	drh_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Interest Only Period

+ References

No definition available.

+ Details

Name:	drh_DebtInstrumentInterestOnlyPeriod
Namespace Prefix:	drh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Defeasance Expense

+ References

No definition available.

+ Details

Name:	drh_DefeasanceExpense
Namespace Prefix:	drh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line Of Credit Facility Covenant Minimum Number Of Unencumbered Borrowing Base Properties

+ References

No definition available.

+ Details

Name:	drh_LineOfCreditFacilityCovenantMinimumNumberOfUnencumberedBorrowingBaseProperties
Namespace Prefix:	drh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility Minimum Unencumbered Borrowing Base Value

+ References

No definition available.

+ Details

Name:	drh_LineOfCreditFacilityCovenantMinimumUnencumberedBorrowingBaseValue
Namespace Prefix:	drh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line Of Credit Facility Covenant Percent of Net Proceeds From Future Equity Issuances

+ References

No definition available.

+ Details

Name:	drh_LineOfCreditFacilityCovenantPercentOfNetProceedsFromFutureEquityIssuances
Namespace Prefix:	drh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility interest and commitment fee amount.

+ References

No definition available.

+ Details

Name:	drh_LineOfCreditFacilityInterestAndCommitmentFeeAmount
Namespace Prefix:	drh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line Of Credit Facility Leverage Ratio

+ References

No definition available.

+ Details

Name:	drh_LineOfCreditFacilityLeverageRatio
Namespace Prefix:	drh_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Number of Unencumbered Borrowing Base Properties

+ References

No definition available.

+ Details

Name:	drh_LineofCreditFacilityNumberofUnencumberedBorrowingBaseProperties
Namespace Prefix:	drh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Unencumbered Borrowing Base Value

+ References

No definition available.

+ Details

Name:	drh_LineofCreditFacilityUnencumberedBorrowingBaseValue
Namespace Prefix:	drh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Mortgage Loans on Real Estate, Extension of Loan Amortization Term

+ References

No definition available.

+ Details

Name:	drh_MortgageLoansonRealEstateExtensionofLoanAmortizationTerm
Namespace Prefix:	drh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage Loans on Real Estate, Extension Option Term

+ References

No definition available.

+ Details

Name:	drh_MortgageLoansOnRealEstateExtensionOptionTerm
Namespace Prefix:	drh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage Loans on Real Estate, Loan Amortization Term

+ References

No definition available.

+ Details

Name:	drh_MortgageLoansonRealEstateLoanAmortizationTerm
Namespace Prefix:	drh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage Loans on Real Estate, Number of Term Extensions

+ References

No definition available.

+ Details

Name:	drh_MortgageLoansonRealEstateNumberofTermExtensions
Namespace Prefix:	drh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of hotel properties secured by mortgage debt.

+ References

No definition available.

+ Details

Name:	drh_NumberOfHotelPropertiesSecuredByMortgageDebt
Namespace Prefix:	drh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_EscrowDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=drh_CourtyardManhattanMidtownEastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=drh_LexingtonHotelNewYorkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=drh_MarriottLosAngelesAirportMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Textuals (Details) (USD $)	12 Months Ended			0 Months Ended				3 Months Ended
Debt - Textuals (Details) (USD $)	Dec. 31, 2014 Hotel	Dec. 31, 2013	Dec. 31, 2012	Oct. 08, 2014	Dec. 10, 2014	Jul. 18, 2014	Jul. 01, 2014	Mar. 31, 2015
Debt Instrument [Line Items]
Number of hotel properties secured by mortgage debt	13
Number of hotels (in hotels)	27us-gaap_NumberOfRealEstateProperties
Maximum borrowing capacity	$ 200,000,000
Increase in Credit Facility	400,000,000
Percent of Net Proceeds from Future Equity Issuances	75.00%
Minimum number of unencumbered borrowing base properties	5
Minimum unencumbered borrowing base	250,000,000
Number of unencumbered borrowing base properties	5
Unencumbered borrowing base	343,600,000
Line Of Credit Facility Leverage Ratio	3.6drh_LineOfCreditFacilityLeverageRatio
Interest and unused credit facility fees	900,000	900,000	2,700,000
LIBOR [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Interest rate at period end	2.09%
Lexington Hotel New York [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Minimum debt service coverage ratio	1.1
Cash trap amount	6,200,000
Lexington Hotel New York [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Extension of loan term				30 months
Number of optional term extensions				2
Extension option term				1 year
Marriott Los Angeles Airport [Member]
Debt Instrument [Line Items]
Prepayment of loan					82,600,000
Defeasance Expense					1,600,000
Courtyard Manhattan / Midtown East [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 86,000,000	$ 41,300,000
Interest rate on mortgage loan						4.40%	8.81%
Interest only period						2 years
Loan amortization term						30 years
Maximum [Member] \| Lexington Hotel New York [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				275.00%
Minimum [Member] \| Lexington Hotel New York [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				175.00%
Scenario, Forecast [Member] \| LIBOR [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								175.00%