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Represents the number of licensed agents under the Delaware State Lottery Code.

No definition available.

Name:	dde_LicensedAgentsNumberUnderDelawareStateLotteryCode
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Data Type:	xbrli:integerItemType
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Period Type:	instant

Represents the number of consecutive years for which annual license has been received from the Delaware Harness Racing Commission.

No definition available.

Name:	dde_NumberOfConsecutiveYearsForWhichAnnualLicenseHasBeenReceived
Namespace Prefix:	dde_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the number of rooms in the hotel operated by the entity.

No definition available.

Name:	dde_NumberOfRoomsInHotel
Namespace Prefix:	dde_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the number of wholly owned subsidiaries of the entity.

No definition available.

Name:	dde_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix:	dde_
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Represents the percentage of issued and outstanding common stock distributed to parent stockholders.

No definition available.

Name:	dde_PercentageOfIssuedAndOutstandingCommonStockDistributedToParentStockholders
Namespace Prefix:	dde_
Data Type:	num:percentItemType
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Period Type:	instant

Represents the percentage of issued and outstanding common stock contributed by parent as a result of a tax-free spin-off transaction.

No definition available.

Name:	dde_StockholdersEquityNoteSpinoffTransactionPercentageContributedByParent
Namespace Prefix:	dde_
Data Type:	num:percentItemType
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Area of a real estate property.

No definition available.

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
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Period Type:	instant

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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Represents the number of stores.

No definition available.

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

- References

No definition available.

Name:	us-gaap_RisksAndUncertaintiesAbstract
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Data Type:	xbrli:stringItemType
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Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=dde_GamingSalesMember
Namespace Prefix:
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Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_StatementGeographicalAxis=stpr_MD
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=dde_SalesFromCapitalClubMemberGamingMember
Namespace Prefix:
Data Type:	na
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