Basis of Presentation Basis of Presentation (Details) - USD ($)
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May 22, 2019 |
May 31, 2019 |
Nov. 30, 2018 |
| International Speedway Corporation (“ISC”) | France Family Group |
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| Business Acquisition [Line Items] |
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| Ownership interest held (percent) |
74.70%
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| International Speedway Corporation (“ISC”) | Proposal | NASCAR Holdings, Inc. (“NASCAR Holdings”) |
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| Business Acquisition [Line Items] |
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| Proposed purchase price per share (in usd per share) |
$ 45.00
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| Payments for termination fees |
$ 117,000,000
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| Class A Common Stock |
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| Business Acquisition [Line Items] |
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| Common Stock, par value (in dollars per share) |
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$ 0.01
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$ 0.01
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| Class B Common Stock |
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| Business Acquisition [Line Items] |
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| Common Stock, par value (in dollars per share) |
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$ 0.01
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$ 0.01
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| France Family Group | Class A Common Stock |
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| Business Acquisition [Line Items] |
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| Common Stock, par value (in dollars per share) |
$ 0.01
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| France Family Group | Class B Common Stock |
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| Business Acquisition [Line Items] |
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| Common Stock, par value (in dollars per share) |
$ 0.01
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| NASCAR Holdings, Inc. (“NASCAR Holdings”) | International Speedway Corporation (“ISC”) |
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| Business Acquisition [Line Items] |
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| Payments for termination fees |
$ 78,000,000
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| Payments for expense reimbursements |
$ 15,000,000
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