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

No definition available.

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- Definition

Represents the length of the motorsports superspeedway racing track.

+ References

No definition available.

+ Details

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Namespace Prefix:	dvd_
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- 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

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- 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

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- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	dvd_
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Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	dvd_
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- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864

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=26873400&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 4

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3(a)(2))

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

Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a

-Article 5

Reference 7: 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

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Period Type:	instant

- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- 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

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: 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 3: 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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 07

-Paragraph b

-Subparagraph 1

-Article 6

+ Details

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- Details

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- Details

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Related Party Transactions (Details)	3 Months Ended		6 Months Ended
Related Party Transactions (Details)	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) item mi	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transactions
Length of motorsports superspeedway of entity (in miles) \| mi			1
Dover Downs Gaming and Entertainment Inc
Related Party Transactions
Costs for administrative and operating services, including leased space allocated by related party	$ 501,000	$ 526,000	$ 946,000	$ 992,000
Administrative and operating service costs allocated to related party	42,000	98,000	129,000	159,000
Receivable from Dover Downs Gaming & Entertainment, Inc.	$ 22,000		$ 22,000		$ 22,000
Length of harness racing track used (in miles) \| mi			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)			14 days
Number of annual motorsports weekends for which use of indoor grandstands is allowed by related party \| item	2		2
Dover Downs Gaming and Entertainment Inc \| Dover Facility
Related Party Transactions
Costs for administrative and operating services, including leased space allocated by related party			$ 422,000	340,000
Administrative and operating service costs allocated to related party	$ 75,000	$ 94,000	$ 111,000	$ 99,000
Board of Directors Chairman
Related Party Transactions
Minimum percentage of voting power controlled by related party	50.00%		50.00%
Minimum percentage of voting power of Gaming controlled by other related party	50.00%		50.00%