Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 417,078	$ 328,189	$ 1,177,517	$ 837,598
Connecticut
Disaggregation of Revenue [Line Items]
Net revenues	236,465	220,061	703,521	574,974
Pennsylvania
Disaggregation of Revenue [Line Items]
Net revenues	66,783	62,931	193,162	153,392
Canada
Disaggregation of Revenue [Line Items]
Net revenues	79,627	14,380	194,719	41,193
Other
Disaggregation of Revenue [Line Items]
Net revenues	34,203	30,306	86,115	66,717
Gaming
Disaggregation of Revenue [Line Items]
Net revenues	293,973	241,289	841,196	623,674
Gaming | Connecticut
Disaggregation of Revenue [Line Items]
Net revenues	157,933	163,938	479,297	434,928
Gaming | Pennsylvania
Disaggregation of Revenue [Line Items]
Net revenues	59,291	57,134	172,570	141,795
Gaming | Canada
Disaggregation of Revenue [Line Items]
Net revenues	59,244	13,283	151,254	38,502
Gaming | Other
Disaggregation of Revenue [Line Items]
Net revenues	17,505	6,934	38,075	8,449
Food and beverage
Disaggregation of Revenue [Line Items]
Net revenues	35,622	20,826	96,157	45,209
Food and beverage | Connecticut
Disaggregation of Revenue [Line Items]
Net revenues	23,120	16,770	66,774	39,022
Food and beverage | Pennsylvania
Disaggregation of Revenue [Line Items]
Net revenues	4,251	2,940	11,265	4,913
Food and beverage | Canada
Disaggregation of Revenue [Line Items]
Net revenues	7,235	0	14,957	0
Food and beverage | Other
Disaggregation of Revenue [Line Items]
Net revenues	1,016	1,116	3,161	1,274
Hotel
Disaggregation of Revenue [Line Items]
Net revenues	30,256	22,188	84,989	55,882
Hotel | Connecticut
Disaggregation of Revenue [Line Items]
Net revenues	24,025	20,758	69,469	52,566
Hotel | Pennsylvania
Disaggregation of Revenue [Line Items]
Net revenues	1,631	1,430	4,561	3,327
Hotel | Canada
Disaggregation of Revenue [Line Items]
Net revenues	4,601	0	10,963	0
Hotel | Other
Disaggregation of Revenue [Line Items]
Net revenues	(1)	0	(4)	(11)
Retail, entertainment and other
Disaggregation of Revenue [Line Items]
Net revenues	57,227	43,886	155,175	112,833
Retail, entertainment and other | Connecticut
Disaggregation of Revenue [Line Items]
Net revenues	31,387	18,595	87,981	48,458
Retail, entertainment and other | Pennsylvania
Disaggregation of Revenue [Line Items]
Net revenues	1,610	1,427	4,766	3,357
Retail, entertainment and other | Canada
Disaggregation of Revenue [Line Items]
Net revenues	8,547	1,097	17,545	2,691
Retail, entertainment and other | Other
Disaggregation of Revenue [Line Items]
Net revenues	$ 15,683	$ 22,256	$ 44,883	$ 57,005