OTHER INTANGIBLE ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Subtotal	$ 460,834	$ 408,677
Less: accumulated amortization	(5,569)	(5,182)
Other intangible assets, net	455,265	403,495
Amortization	738	413	$ 411
Mohegan Sun trademark
Finite-Lived Intangible Assets [Line Items]
Other indefinite-lived intangible assets	119,692	119,692
Mohegan Sun Pocono slot machine, table game, interactive gaming and sports wagering licenses
Finite-Lived Intangible Assets [Line Items]
Other indefinite-lived intangible assets	298,500	280,500
MGE Niagara Resorts Casino Operating and Services Agreement rights
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 16,753	0
Useful life	21 years
Other
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 25,889	$ 8,485