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Related Party Transactions (Details) - USD ($)		1 Months Ended	12 Months Ended
	Dec. 22, 2020	Nov. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Total revenues			$ 694,155,000	$ 973,410,000	$ 851,794,000
Shares repurchased (in shares)					1,200,000
Shares repurchased, value			950,000		$ 19,598,000
Accumulated Deficit
Related Party Transaction [Line Items]
Shares repurchased, value			950,000		19,586,000
Mr. Sartini
Related Party Transaction [Line Items]
Due to related parties			0	0
Reimbursement expense paid			500,000	600,000	600,000
Sean T. Higgins
Related Party Transaction [Line Items]
Total revenues			800,000	1,000,000.0	1,000,000.0
Gaming expenses			700,000	$ 900,000	900,000
Lyle A. Berman
Related Party Transaction [Line Items]
Consulting agreement, term				3 years
Annual director fees				$ 200,000
Consulting agreement expenses, related party			0	0
Shares repurchased (in shares)	50,000
Common stock price per share (USD per share)	$ 19.00
Lyle A. Berman | Accumulated Deficit
Related Party Transaction [Line Items]
Shares repurchased, value	$ 1,000,000.0
Lyle A. Berman | Maximum
Related Party Transaction [Line Items]
Consulting agreement expenses, related party					100,000
Office Headquarters
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party			$ 0	0
Office Headquarters | Mr. Sartini
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party			33.00%
Related party transaction, amounts of transaction			$ 1,600,000	1,300,000	1,300,000
Due to related parties			0	0
Related party transaction, due from (to) related party			$ 0	0
Office Headquarters | Mr. Sartini's Immediate Family Members
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party			5.00%
Office Headquarters | Stephen Arcana
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party			3.00%
Office Space Lease | Mr. Sartini
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party		33.00%
Related party transaction, amounts of transaction			$ 100,000
Office Space Lease | Mr. Sartini's Immediate Family Members
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party		5.00%
Office Space Lease | Mr. Arcana
Related Party Transaction [Line Items]
Percentage of counterparty ownership by related party		3.00%
Tavern Leases | Mr. Sartini
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction			200,000	400,000	$ 400,000
Due to related parties			$ 0	$ 0

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