RELATED PARTY TRANSACTIONS (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Mohegan Tribe of Indians of Connecticut [Member]
Related Party Transaction [Line Items]
Distributions to the Tribe	$ 12,500,000	$ 14,600,000	$ 40,500,000	$ 23,700,000
Mohegan Sun [Member]
Related Party Transaction [Line Items]
Expenses for services provided to related party	6,800,000	6,900,000	20,300,000	20,600,000
Mohegan Tribal Utility Authority [Member]
Related Party Transaction [Line Items]
Utilities purchased from related party	4,200,000	5,300,000	14,200,000	16,300,000
Mohegan Tribe Promissory Note, 2009 [Member] | Mohegan Tribe of Indians of Connecticut [Member]
Related Party Transaction [Line Items]
Incurred interest expense associated with a related party debt	281,000	374,000	997,000	1,100,000
Mohegan Tribe Minor's Trust Promissory Note, 2012 [Member] | Mohegan Tribe of Indians of Connecticut [Member]
Related Party Transaction [Line Items]
Incurred interest expense associated with a related party debt	497,000		508,000
Mohegan Tribe Credit Facility [Member] | Mohegan Tribe of Indians of Connecticut [Member]
Related Party Transaction [Line Items]
Incurred interest expense associated with a related party debt	$ 54,000	$ 15,000	$ 147,000	$ 18,000