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Note Receivable (Details) (USD $)	0 Months Ended	12 Months Ended
	May 21, 2014	Dec. 31, 2014 rooms
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of rooms in senior loan secured facility (in rooms)		10,552us-gaap_NumberOfUnitsInRealEstateProperty
Allerton Loan [Member] | Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount received from early repayment of senior mortgage loan	$ 58,500,000us-gaap_ProceedsFromRepaymentsOfSecuredDebt / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_NewAllertonLoansMember
Number of rooms in senior loan secured facility (in rooms)		443us-gaap_NumberOfUnitsInRealEstateProperty / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_NewAllertonLoansMember
Gain on repayment of senior mortgage loan	13,600,000drh_GainLossOnRepaymentOfSecuredDebt / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_NewAllertonLoansMember
Mortgage amount		$ 66,000,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_NewAllertonLoansMember
Loan term		4 years
Extension option term		1 year
Fixed annual interest rate on mortgage loan		5.50%us-gaap_MortgageLoansOnRealEstateInterestRate / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = drh_NewAllertonLoansMember
Amortization Schedule		30 years

X

- Definition

Gain (Loss) On Repayment Of Secured Debt

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Mortgage Loan Amortization Term

+ References

No definition available.

+ Details

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Namespace Prefix:	drh_
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Balance Type:	na
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X

- Definition

Mortgage Loans on Real Estate, Extension Option Term

+ References

No definition available.

+ Details

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Namespace Prefix:	drh_
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Balance Type:	na
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- Definition

Mortgage Loans on Real Estate, Loan Term

+ References

No definition available.

+ Details

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- Details

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Balance Type:	na
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X

- Definition

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

+ 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

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

X

- 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

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Balance Type:	na
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X

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of cash inflow (outflow) from long-term debt wholly or partially secured by collateral. Excludes tax exempt secured debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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

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