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Acquisitions - Turfway Park (Details) - USD ($) $ in Millions | Oct. 09, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 31, 2018 | Dec. 31, 2017
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Business Acquisition [Line Items] |  |  |  |  |
Cash acquired in the acquisition |  |  |  | $ 13.1 |
Goodwill acquired in the acquisition |  | $ 367.1 | $ 338.0 |  | $ 317.6
Turfway Park |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total consideration | $ 46.0 |  |  |  |
Consideration to be paid | 36.0 |  |  |  |
Purchase and sale agreement rights | 10.0 |  |  |  |
Working capital and other purchase price adjustments | 0.9 |  |  |  |
Cash acquired in the acquisition | 0.6 |  |  |  |
Land acquired in the acquisition | 18.8 |  |  |  |
Goodwill acquired in the acquisition | 3.0 |  |  |  |
Current liabilities acquired in the acquisition | 2.6 |  |  |  |
Turfway Park | Gaming rights |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible assets acquired in the acquisition | 9.8 |  |  |  |
Turfway Park | Trademarks |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible assets acquired in the acquisition | $ 5.5 |  |  |  |

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