LONG-TERM DEBT - Schedule and Introduction (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 Credit Facility Bank Credit Facility, due March 2015	Sep. 30, 2012 Credit Facility Bank Credit Facility, due March 2015	Jun. 30, 2013 Credit Facility Term Loan Facility, due March 2016, net of discount of $3,263 and $3,988, respectively	Sep. 30, 2012 Credit Facility Term Loan Facility, due March 2016, net of discount of $3,263 and $3,988, respectively	Jun. 30, 2013 Credit Facility Mohegan Tribe Credit Facility, due September 2013	Sep. 30, 2012 Credit Facility Mohegan Tribe Credit Facility, due September 2013	Jun. 30, 2012 Credit Facility Mohegan Tribe Credit Facility, due September 2013	Jun. 30, 2013 Credit Facility Downs Lodging Credit Facility, due July 2016	Sep. 30, 2012 Credit Facility Downs Lodging Credit Facility, due July 2016	Jun. 30, 2013 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $5 and $6, respectively	Sep. 30, 2012 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $5 and $6, respectively	Oct. 31, 2009 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $5 and $6, respectively	Jun. 30, 2013 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $4,981 and $5,587, respectively	Sep. 30, 2012 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $4,981 and $5,587, respectively	Mar. 06, 2012 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $4,981 and $5,587, respectively	Jun. 30, 2013 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016	Sep. 30, 2012 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016	Mar. 06, 2012 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016	Jun. 30, 2013 Senior Unsecured Notes 2005 6 1/8% Senior Unsecured Notes, due February 2013	Sep. 30, 2012 Senior Unsecured Notes 2005 6 1/8% Senior Unsecured Notes, due February 2013	Mar. 06, 2012 Senior Unsecured Notes 2005 6 1/8% Senior Unsecured Notes, due February 2013	Feb. 28, 2005 Senior Unsecured Notes 2005 6 1/8% Senior Unsecured Notes, due February 2013	Jun. 30, 2013 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes, due August 2014	Sep. 30, 2012 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes, due August 2014	Aug. 31, 2004 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes, due August 2014	Jun. 30, 2013 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes, due February 2015	Sep. 30, 2012 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes, due February 2015	Feb. 28, 2005 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes, due February 2015	Jun. 30, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018	Sep. 30, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018	Mar. 06, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018	Jun. 30, 2013 Promissory Notes 2009 Mohegan Tribe Promissory Note, due September 2014	Sep. 30, 2012 Promissory Notes 2009 Mohegan Tribe Promissory Note, due September 2014	Sep. 30, 2009 Promissory Notes 2009 Mohegan Tribe Promissory Note, due September 2014	Jun. 30, 2013 Promissory Notes 2012 Mohegan Tribe Minor's Trust Promissory Note, due March 2016	Sep. 30, 2012 Promissory Notes 2012 Mohegan Tribe Minor's Trust Promissory Note, due March 2016	Jun. 30, 2012 Promissory Notes 2012 Mohegan Tribe Minor's Trust Promissory Note, due March 2016	Jun. 30, 2013 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Mar. 29, 2013 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Sep. 30, 2012 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Jun. 30, 2013 Promissory Notes Salishan-Mohegan Promissory Notes, due December 2014	Sep. 30, 2012 Promissory Notes Salishan-Mohegan Promissory Notes, due December 2014
Debt Schedule [Abstract]
Note stated interest rate									15.00%			11.50%		11.50%	11.50%		11.50%	10.50%		10.50%	6.125%			6.125%	7.125%		7.125%	6.875%		6.875%	11.00%		11.00%			10.00%			10.00%		4.00%
Unamortized discount					$ 3,263	$ 3,988						$ 5	$ 6		$ 4,981	$ 5,587
Long-term debt, subtotal	1,680,415	1,697,415	394,000	397,000	221,737	221,012	363	1,450		45,000	45,000	195	194		194,819	194,213		417,771	417,771		0	15,775	15,775		21,156	21,156		9,654	9,654		344,190	344,190		5,125	10,000		18,500	20,000		7,420		0	485	0
Plus: net deferred gain on derivative instruments sold	320	386
Long-term debt, excluding capital leases	1,680,735	1,697,801
Less: current portion of long-term debt	(10,670)	(29,737)
Long-term debt, net of current portion	$ 1,670,065	$ 1,668,064