Revenue Recognition - Summary of Net Revenues Disaggregated Type of Revenue and Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 126,470	$ 637,121	$ 599,539	$ 1,272,944
Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	101,479	457,162	441,228	927,848
Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	6,567	75,356	62,813	150,637
Hotel
Disaggregation of Revenue [Line Items]
Net revenues	8,916	78,391	57,292	143,175
Other
Disaggregation of Revenue [Line Items]
Net revenues	9,508	26,212	38,206	51,284
Corporate
Disaggregation of Revenue [Line Items]
Net revenues	1,912	1,971	3,885	3,493
Corporate | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Corporate | Other
Disaggregation of Revenue [Line Items]
Net revenues	1,912	1,971	3,885	3,493
West Segment | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	29,937	127,727	135,427	245,822
West Segment | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	15,276	55,493	60,253	108,899
West Segment | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	3,564	29,209	27,147	57,187
West Segment | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	6,171	33,943	28,016	61,451
West Segment | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	4,926	9,082	20,011	18,285
Midwest Segment | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	22,787	97,239	83,580	194,026
Midwest Segment | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	21,119	85,223	74,432	170,392
Midwest Segment | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	614	5,897	4,013	11,984
Midwest Segment | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	616	4,101	3,160	7,723
Midwest Segment | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	438	2,018	1,975	3,927
South Segment | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	30,760	116,937	127,812	249,651
South Segment | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	27,303	94,871	106,955	204,221
South Segment | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	1,519	13,056	12,170	27,765
South Segment | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	1,378	6,838	6,312	13,175
South Segment | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	560	2,172	2,375	4,490
East Segment | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	21,226	170,455	129,282	336,688
East Segment | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	19,777	124,052	99,708	249,003
East Segment | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	245	14,959	9,709	29,680
East Segment | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	0	24,336	13,560	44,333
East Segment | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	1,204	7,108	6,305	13,672
Central Segment | Operating Segment
Disaggregation of Revenue [Line Items]
Net revenues	19,848	122,792	119,553	243,264
Central Segment | Operating Segment | Casino and pari-mutuel commissions
Disaggregation of Revenue [Line Items]
Net revenues	18,004	97,523	99,880	195,333
Central Segment | Operating Segment | Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	625	12,235	9,774	24,021
Central Segment | Operating Segment | Hotel
Disaggregation of Revenue [Line Items]
Net revenues	751	9,173	6,244	16,493
Central Segment | Operating Segment | Other
Disaggregation of Revenue [Line Items]
Net revenues	$ 468	$ 3,861	$ 3,655	$ 7,417