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Fair Value Measurements - Additional Information (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) payment | Dec. 31, 2018 USD ($) payment | Jan. 19, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities | $ 40.5 |  |
Impairment of promissory notes and bonds | $ 2.5 |  |
Interest rate | 5.625% |  |
Plainridge Park Casino |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Period of actual earnings used to calculate contingent consideration | 10 years |  |
Number of remaining annual payments | payment | 6 | 7 |
Absolute Bingo |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Period of actual earnings used to calculate contingent consideration | 2 years |  |
Number of remaining annual payments | payment | 1 |  |
Senior notes | 5.625% Notes due 2027 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Interest rate | 5.625% |  | 5.625%
Retama Nominal Holder, LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Ownership interest | 1.00% |  |
Pinnacle Retama Partners, LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Ownership interest by parent | 75.50% |  |
Pinnacle Retama Partners, LLC | Retama Development Corporation |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Promissory notes | $ 15.1 | $ 16.9 |
Local government bonds | Pinnacle Retama Partners, LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Bonds, at amortized cost | $ 6.7 | $ 7.5 |

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