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REVENUE RECOGNITION - Additional Information (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) terminal | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |
Contracts with customers receivables |  | $ 12.0 | $ 16.0 |
Colorado |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue recognized | $ 2.0 |  |  |
Loyalty programs |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue recognized |  | 5.5 | 10.0 | $ 8.2
Contract liabilities related to loyalty programs |  | 15.5 | 12.4 |
Customer deposits |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract liabilities related to loyalty programs |  | 1.0 | 1.4 |
Unpaid tickets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract liabilities related to loyalty programs |  | 0.9 | $ 1.1 |
Online sports betting and iGaming market access |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Deferred revenue |  | $ 2.0 |  |
Rhode Island | VLT revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Number of video lottery terminals (VLTs) | terminal |  | 3,002 |  |
Rhode Island | Table games revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of share of revenues |  | 83.50% |  |
Rhode Island | Threshold one | VLT revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of share of revenues |  | 28.85% |  |
Rhode Island | Threshold two | VLT revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of share of revenues |  | 26.00% |  |
Delaware | VLT revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of share of revenues |  | 42.00% |  |
Delaware | Table games revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of share of revenues |  | 80.00% |  |

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