Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Connecticut
Disaggregation of Revenue [Line Items]
Gross revenues	$ 940,282	$ 816,376	$ 715,674
Pennsylvania
Disaggregation of Revenue [Line Items]
Gross revenues	257,840	221,479	181,160
Canada
Disaggregation of Revenue [Line Items]
Gross revenues	279,263	99,202	180,025
Other
Disaggregation of Revenue [Line Items]
Gross revenues	113,126	92,036	37,930
Gaming
Disaggregation of Revenue [Line Items]
Gross revenues	1,122,864	910,378	799,647
Gaming | Connecticut
Disaggregation of Revenue [Line Items]
Gross revenues	631,456	604,482	518,599
Gaming | Pennsylvania
Disaggregation of Revenue [Line Items]
Gross revenues	229,163	202,932	159,661
Gaming | Canada
Disaggregation of Revenue [Line Items]
Gross revenues	213,165	87,406	121,387
Gaming | Other
Disaggregation of Revenue [Line Items]
Gross revenues	49,080	15,558	0
Food and beverage
Disaggregation of Revenue [Line Items]
Gross revenues	134,724	73,631	103,678
Food and beverage | Connecticut
Disaggregation of Revenue [Line Items]
Gross revenues	90,722	59,611	64,012
Food and beverage | Pennsylvania
Disaggregation of Revenue [Line Items]
Gross revenues	16,005	8,718	12,208
Food and beverage | Canada
Disaggregation of Revenue [Line Items]
Gross revenues	23,782	2,837	27,544
Food and beverage | Other
Disaggregation of Revenue [Line Items]
Gross revenues	4,215	2,465	(86)
Hotel
Disaggregation of Revenue [Line Items]
Gross revenues	115,828	84,307	69,113
Hotel | Connecticut
Disaggregation of Revenue [Line Items]
Gross revenues	94,240	77,282	58,219
Hotel | Pennsylvania
Disaggregation of Revenue [Line Items]
Gross revenues	6,258	4,946	4,578
Hotel | Canada
Disaggregation of Revenue [Line Items]
Gross revenues	15,339	2,091	6,319
Hotel | Other
Disaggregation of Revenue [Line Items]
Gross revenues	(9)	(12)	(3)
Retail, entertainment and other | Connecticut
Disaggregation of Revenue [Line Items]
Gross revenues	123,864	75,001	74,844
Retail, entertainment and other | Pennsylvania
Disaggregation of Revenue [Line Items]
Gross revenues	6,414	4,883	4,713
Retail, entertainment and other | Canada
Disaggregation of Revenue [Line Items]
Gross revenues	26,977	6,868	24,775
Retail, entertainment and other | Other
Disaggregation of Revenue [Line Items]
Gross revenues	$ 59,840	$ 74,025	$ 38,019