Revenue Recognition - Summary of Net Revenues Disaggregated Type of Revenue and Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,377,000	$ 663,000	$ 1,977,000	$ 1,936,000
Accounts receivable, net	385,000		385,000		$ 54,000
Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	919,000	458,000	1,360,000	1,386,000
Contract receivable	121,000		121,000		16,000
Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	125,000	78,000	188,000	229,000
Hotel
Disaggregation of Revenue [Line Items]
Net revenues	200,000	94,000	257,000	237,000
Food and beverage and hotel
Disaggregation of Revenue [Line Items]
Contract receivable	27,000		27,000		17,000
Other
Disaggregation of Revenue [Line Items]
Net revenues	133,000	33,000	172,000	84,000
Contract receivable	237,000		237,000		$ 21,000
Corporate and other
Disaggregation of Revenue [Line Items]
Net revenues	4,000	2,000	8,000	6,000
Corporate and other | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate and other | Other
Disaggregation of Revenue [Line Items]
Net revenues	4,000	2,000	8,000	6,000
Las Vegas | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	304,000	0	304,000	0
Las Vegas | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	122,000	0	122,000	0
Las Vegas | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	52,000	0	52,000	0
Las Vegas | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	79,000	0	79,000	0
Las Vegas | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	51,000	0	51,000	0
Regional | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	1,000,000	661,000	1,596,000	1,930,000
Regional | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	774,000	458,000	1,215,000	1,386,000
Regional | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	72,000	78,000	135,000	229,000
Regional | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	121,000	94,000	178,000	237,000
Regional | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	33,000	31,000	68,000	78,000
Managed, International, CIE | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	69,000	0	69,000	0
Managed, International, CIE | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	23,000	0	23,000	0
Managed, International, CIE | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	1,000	0	1,000	0
Managed, International, CIE | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Managed, International, CIE | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	$ 45,000	$ 0	$ 45,000	$ 0