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Investments in and Advances to Unconsolidated Affiliates - Additional information (Details) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 01, 2021 USD ($) | Aug. 01, 2021 USD ($) | Feb. 20, 2020 $ / shares shares | Feb. 29, 2020 USD ($) option $ / shares | Sep. 30, 2021 $ / shares shares | Mar. 31, 2021 shares | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment purchase price, cash |  |  |  |  |  |  |  |  | $ 0.0 | $ 135.0 | $ 0.0
Barstool Sports investment (Note 7) |  |  |  |  |  |  |  |  |  | 23.1 |
Stock issuance/offerings ( in shares) | shares |  |  |  |  | 43,000 | 151,200 |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.01 |  |
Return on investment from unconsolidated affiliates |  |  |  |  |  |  |  |  | $ 31.8 | $ 21.8 | 29.0
Sam Houston Race Park and Valley Race Park |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Investments |  | $ 29.9 |  |  |  |  |  |  |  |  |
Series D Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock issuance/offerings ( in shares) | shares |  |  | 883 |  | 43 | 43 |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.01 |  |  |  |  | $ 0.01 | $ 0.01 | $ 0.01 |
Preferred stock, conversion period |  |  | 4 years |  |  |  |  |  |  |  |
Preferred stock, percent to convert in each tranche |  |  | 20.00% |  |  |  |  |  |  |  |
Convertible preferred stock, shares issued upon conversion (in shares) | shares |  |  |  |  |  |  |  |  | 26 |  |
Convertible preferred stock, conversion ratio |  |  | 0.001 |  |  |  |  |  |  |  |
Barstool Sports, Inc |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  | $ 0.0001 |  |  |  |  |  |  |
Investment balance |  |  |  |  |  |  |  | $ 147.5 | $ 162.5 | $ 147.5 |
Barstool Sports, Inc |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  | 36.00% | 36.00% | 36.00% |
Investment acquired, percent |  |  |  | 36.00% |  |  |  |  |  |  |
Investment acquired, percent, delayed basis |  |  |  | 1.00% |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 0.0001 |  |  |  |  |  |
Investment purchase price | $ 325.0 |  |  | $ 161.2 |  |  |  |  |  |  |
Investment purchase price, cash |  |  |  | 135.0 |  |  |  |  |  |  |
Barstool Sports investment (Note 7) |  |  |  | $ 23.1 |  |  |  |  |  |  |
Investment acquired, period after which ownership will increase |  |  |  | 3 years |  |  |  |  |  |  |
Investment acquired, ownership percentage following additional investment | 50.00% |  |  | 50.00% |  |  |  |  |  |  |
Investment acquired, expected additional investment | $ 62.0 |  |  | $ 62.0 |  |  |  |  |  |  |
Investment acquired, valuation of acquiree total common stock outstanding at time of acquisition | $ 450.0 |  |  | $ 450.0 |  |  |  |  |  |  |
Investment acquired, period after which remaining shares of investment are callable |  |  |  | 3 years |  |  |  |  |  |  |
Investment acquired, fair market value at time of exercise, cap |  |  |  | $ 650.0 |  |  |  |  |  |  |
Investment acquired, multiplier of revenue to calculate floor at time of exercise | 2.25 |  |  | 2.25 |  |  |  |  |  |  |
Stock issuance/offerings ( in shares) | shares |  |  |  |  |  |  |  |  | 86 |  |
Ownership acquired |  |  |  |  |  | 0.30% |  |  | 0.60% |  |
Equity method investment acquired, percentage of shares acquired on delayed basis |  |  |  | 1.00% |  |  |  |  |  |  |
Commercial agreement term |  |  |  | 10 years |  |  |  |  |  |  |
Commercial agreement number of renewals | option |  |  |  | 3 |  |  |  |  |  |  |
Commercial agreement renewal term |  |  |  | 10 years |  |  |  |  |  |  |
Commercial agreement term with exercise of renewals |  |  |  | 40 years |  |  |  |  |  |  |
Customer list intangible asset |  |  |  |  |  |  |  | $ 1.6 | $ 0.8 | $ 1.6 |
Prepaid advertising |  |  |  |  |  |  |  | 16.5 | 15.4 | 16.5 |
Prepaid advertising, long-term |  |  |  |  |  |  |  | 15.4 | $ 14.2 | 15.4 |
Kansas Entertainment |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  | 50.00% |  |
Investment balance |  |  |  |  |  |  |  | 85.2 | $ 83.8 | 85.2 |
Return on investment from unconsolidated affiliates |  |  |  |  |  |  |  |  | $ 31.8 | $ 20.0 | $ 29.0
Freehold Raceway |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  | 50.00% |  |
MAXXAM |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  | 50.00% |  |
Other-than-temporary impairment of investment |  |  |  |  |  |  | $ 4.6 | $ 0.0 | $ 0.0 |  |

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