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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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