Represents the length of harness racing track used by the related party of the entity.

No definition available.

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Namespace Prefix:	dvd_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the length of the motorsports superspeedway racing track.

+ References

No definition available.

+ Details

Name:	dvd_LengthOfMotorsportsSuperspeedwayRacingTrack
Namespace Prefix:	dvd_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of annual motorsports weekends for which use of indoor grandstands is allowed by the related party.

+ References

No definition available.

+ Details

Name:	dvd_NumberOfAnnualMotorsportsWeekendsForWhichUseOfIndoorGrandstandsAllowedByRelatedParty
Namespace Prefix:	dvd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the period, before and after the period of exclusive use of harness track, for which the related party has set up and tear down rights.

+ References

No definition available.

+ Details

Name:	dvd_PeriodOfSetUpAndTearDownRightsPertainingToHarnessTrackToRelatedParty
Namespace Prefix:	dvd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of voting power of the entity held by the related party of the entity.

+ References

No definition available.

+ Details

Name:	dvd_RelatedPartyTransactionMinimumPercentageOfVotingPowerHeldByRelatedParty
Namespace Prefix:	dvd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of voting power of one related party held by other related party.

+ References

No definition available.

+ Details

Name:	dvd_RelatedPartyTransactionMinimumPercentageOfVotingPowerHeldByRelatedPartyInOtherRelatedParty
Namespace Prefix:	dvd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

+ Details

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

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

+ Details

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

- Details

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

- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Related Parties

-URI http://asc.fasb.org/extlink&oid=16382449

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.6-07.1(c))

-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 07

-Paragraph b

-Subparagraph 1

-Article 6

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

Related Party Transactions (Details) (USD $)	3 Months Ended
Related Party Transactions (Details) (USD $)	Mar. 31, 2013 mi weekend week	Mar. 31, 2012	Dec. 31, 2012
Related Party Transactions
Length of motorsports superspeedway of entity (in miles)	1
Dover facility
Related Party Transactions
Administrative and operating service costs allocated to related party		$ 96,000
Dover Downs Gaming & Entertainment, Inc
Related Party Transactions
Costs for administrative and operating services, including leased space allocated by related party	427,000	421,000
Administrative and operating service costs allocated to related party	94,000	83,000
Amount of balances due (to) related party	$ 0		$ 0
Length of harness racing track used (in miles)	0.625
Period, before and after the period of exclusive use of harness track, for which related party has set up and tear down rights (in weeks)	2
Number of annual motorsports weekends for which use of indoor grandstands is allowed by related party	2
Henry B. Tippie
Related Party Transactions
Minimum percentage of voting power controlled by related party	50.00%
Minimum percentage of voting power of Gaming controlled by other related party	50.00%