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Debt, Schedule of Ratio of Net Indebtedness (Details)	9 Months Ended
	Sep. 09, 2011
Line Of Credit Facility Leverage Range [Line Items]
Percent Of Unused Portion Line Of Credit Facility Trigerring Lower Commitment Fee Percentage	50.00%
Minimum [Member]
Line Of Credit Facility Leverage Range [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.40%
Minimum [Member] | Greater than or equal to 4.00 to 1.00 but less than 5.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	4
Minimum [Member] | Greater than or equal to 5.00 to 1.00 but less than 5.50 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	5
Minimum [Member] | Greater than or equal to 5.50 to 1.00 but less than 6.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	5.5
Minimum [Member] | Greater than or equal to 6.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	6
Maximum [Member]
Line Of Credit Facility Leverage Range [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.30%
Maximum [Member] | Less than 4.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	4
Maximum [Member] | Greater than or equal to 4.00 to 1.00 but less than 5.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	5
Maximum [Member] | Greater than or equal to 5.00 to 1.00 but less than 5.50 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	5.5
Maximum [Member] | Greater than or equal to 5.50 to 1.00 but less than 6.00 to 1.00 [Member]
Summary of leverage and applicable margin
Ratio Of Net Indebtedness to Ebitda	6
Less than 4.00 to 1.00 [Member]
Summary of leverage and applicable margin
Line Of Credit Facility Applicable Margin Rate	2.25%
Greater than or equal to 4.00 to 1.00 but less than 5.00 to 1.00 [Member]
Summary of leverage and applicable margin
Line Of Credit Facility Applicable Margin Rate	2.50%
Greater than or equal to 5.00 to 1.00 but less than 5.50 to 1.00 [Member]
Summary of leverage and applicable margin
Line Of Credit Facility Applicable Margin Rate	2.75%
Greater than or equal to 5.50 to 1.00 but less than 6.00 to 1.00 [Member]
Summary of leverage and applicable margin
Line Of Credit Facility Applicable Margin Rate	3.00%
Greater than or equal to 6.00 to 1.00 [Member]
Summary of leverage and applicable margin
Line Of Credit Facility Applicable Margin Rate	3.25%

X

- Definition

Line of credit facility, leverage and applicable margin.

+ Details

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Namespace Prefix:	drh
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Balance Type:	na
Period Type:	duration

X

- Definition

Line of credit facility leverage range.

+ Details

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Namespace Prefix:	drh
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Balance Type:	na
Period Type:	duration

X

- Definition

Line of credit facility applicable margin rate.

+ Details

Name:	drh_LineOfCreditInterestRateMarginPercentage
Namespace Prefix:	drh
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percent Of Unused Portion Line Of Credit Facility Trigerring Commitment Fee Percentage

+ Details

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Namespace Prefix:	drh
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Ratio Of Net Indebtedness to Ebitda

+ Details

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ Details

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Namespace Prefix:	us-gaap
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Balance Type:	na
Period Type:	duration