Represents the notice period for termination of agreement for service receiver.

No definition available.

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- Definition

Represents the number of motorsports events promoted by the entity.

+ References

No definition available.

+ Details

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- Definition

Represents the number of business days after receipt of an invoice within which the party receiving the services is required to pay.

+ References

No definition available.

+ Details

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- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

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

+ References

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- 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
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-SubTopic 10
-Section S99
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- Details

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- Details

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- Details

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Related Party Transactions (Details)	3 Months Ended					12 Months Ended
Related Party Transactions (Details)	Dec. 31, 2018 USD ($) item	Jun. 30, 2018 item	Dec. 31, 2017 USD ($) item	Sep. 30, 2017 item	Jun. 30, 2017 item	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Related Party Transactions
Number of events \| item	3	3	1	2	3	6
Agreement termination period (in days)						90 days
Dover Downs Gaming & Entertainment, Inc.
Related Party Transactions
Payable to related party						$ 1,775,000	$ 1,862,000	$ 1,952,000
Receivable from related party						189,000	187,000	158,000
Current payable due to related party	$ 9,000		$ 7,000			$ 9,000	7,000
Number of events \| item						2
Invoice terms (in days)						30 days
Agreement termination period (in days)						180 days
Dover Downs Gaming & Entertainment, Inc. \| NASCAR
Related Party Transactions
Payable to related party						$ 847,000	903,000	876,000
Receivable from related party						$ 211,000	$ 224,000	$ 200,000
Chairman of the Board
Related Party Transactions
Voting rights (in percent)	50.00%					50.00%
Chairman of the Board \| Dover Downs Gaming & Entertainment, Inc.
Related Party Transactions
Voting rights (in percent)	50.00%					50.00%