LONG-TERM DEBT - Promissory Notes (Details) (USD $)								9 Months Ended
	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2012 Promissory Notes [Member] Mohegan Tribe Promissory Note, 2009 [Member]	Sep. 30, 2011 Promissory Notes [Member] Mohegan Tribe Promissory Note, 2009 [Member]	Sep. 30, 2009 Promissory Notes [Member] Mohegan Tribe Promissory Note, 2009 [Member]	Jun. 30, 2012 Promissory Notes [Member] Mohegan Tribe Minor's Trust Promissory Note, 2012 [Member]	Mar. 31, 2012 Promissory Notes [Member] Mohegan Tribe Minor's Trust Promissory Note, 2012 [Member]	Jun. 30, 2012 Commencing December 31, 2012 through September 30, 2014 [Member] Promissory Notes [Member] Mohegan Tribe Minor's Trust Promissory Note, 2012 [Member]	Jun. 30, 2012 Commencing December 31, 2014 to Maturity [Member] Promissory Notes [Member] Mohegan Tribe Minor's Trust Promissory Note, 2012 [Member]	Jun. 30, 2012 Commencing December 31, 2012 through September 30, 2013 [Member] Promissory Notes [Member] Mohegan Tribe Promissory Note, 2009 [Member]	Jun. 30, 2012 Commencing December 31, 2013 [Member] Promissory Notes [Member] Mohegan Tribe Promissory Note, 2009 [Member]
Debt Instrument [Line Items]
Loan face amount					$ 10,000,000		$ 20,000,000
Note stated interest rate					10.00%		10.00%
Quarterly interest payment					1,200,000
Quarterly amortization of principal								500,000	1,500,000	1,625,000	875,000
Accrued interest	$ 46,614,000	$ 28,580,000	$ 3,700,000	$ 2,700,000		$ 11,000