LONG-TERM DEBT - Schedules and Introduction (Details) (USD $)	12 Months Ended																								0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Credit Facility Bank Credit Facility, due March 2015	Sep. 30, 2012 Credit Facility Bank Credit Facility, due March 2015	Sep. 30, 2013 Credit Facility Term Loan Facility, due March 2016, net of discount of $3,005 and $3,988, respectively	Sep. 30, 2012 Credit Facility Term Loan Facility, due March 2016, net of discount of $3,005 and $3,988, respectively	Mar. 06, 2012 Credit Facility Term Loan Facility, due March 2016, net of discount of $3,005 and $3,988, respectively	Sep. 30, 2013 Credit Facility Mohegan Tribe Credit Facility, due September 2013	Sep. 30, 2012 Credit Facility Mohegan Tribe Credit Facility, due September 2013	Sep. 30, 2013 Credit Facility Downs Lodging Credit Facility, due July 2016	Sep. 30, 2012 Credit Facility Downs Lodging Credit Facility, due July 2016	Sep. 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	Sep. 30, 2013 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $8,898 and $10,029, respectively	Sep. 30, 2012 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $8,898 and $10,029, respectively	Mar. 06, 2012 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $8,898 and $10,029, respectively	Sep. 30, 2013 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016, net of discount of $7,160	Sep. 30, 2012 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016, net of discount of $7,160	Mar. 06, 2012 Senior Secured Notes 2012 10 1/2% Third Lien Senior Secured Notes, due December 2016, net of discount of $7,160	Sep. 30, 2013 Senior Unsecured Notes 2012 11 1/2% Second Lien Senior Secured Notes, due November 2017, net of discount of $8,898 and $10,029, respectively	Sep. 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	Feb. 28, 2005 Senior Unsecured Notes 2005 6 1/8% Senior Unsecured Notes, due February 2013	Aug. 15, 2013 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes, due September 2021	Sep. 30, 2013 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes, due September 2021	Sep. 30, 2012 Senior Unsecured Notes 2013 9 3/4% Senior Unsecured Notes, due September 2021	Aug. 15, 2013 Senior Unsecured Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,168 and $5,959, respectively	Sep. 30, 2013 Senior Subordinated Notes 2013 9 3/4% Senior Unsecured Notes, due September 2021	Sep. 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	Sep. 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	Sep. 30, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,168 and $5,959, respectively	Aug. 15, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,168 and $5,959, respectively	Sep. 30, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,168 and $5,959, respectively	Mar. 06, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,168 and $5,959, respectively	Sep. 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, 2010 Promissory Notes 2009 Mohegan Tribe Promissory Note, due September 2014	Sep. 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	Mar. 31, 2012 Promissory Notes 2012 Mohegan Tribe Minor's Trust Promissory Note, due March 2016	Sep. 30, 2013 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	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	Sep. 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]
Interest rate												11.50%		11.50%	11.50%		11.50%	10.50%		10.50%		6.125%		6.125%	9.75%				9.75%	7.125%		7.125%	6.875%		6.875%	11.00%			11.00%			10.00%			10.00%			4.00%
Unamortized discount					$ 3,005,000	$ 3,988,000						$ 5,000	$ 6,000		$ 8,898,000	$ 10,029,000			$ 7,160,000		$ 400,000															$ 4,168,000		$ 5,959,000
Long-term debt, subtotal	1,682,312,000	1,679,854,000	393,000,000	397,000,000	221,995,000	221,012,000		0	1,450,000	45,000,000	45,000,000	195,000	194,000		190,902,000	189,771,000		0	410,611,000			0	15,775,000			500,000,000	0			21,156,000	21,156,000		9,654,000	9,654,000		271,022,000		338,231,000		3,500,000	10,000,000		18,000,000	20,000,000		7,420,000			0	468,000	0
Plus: net deferred gain on derivative instruments sold	0	386,000
Long-term debt, excluding capital leases	1,682,312,000	1,680,240,000
Less: current portion of long-term debt	(9,563,000)	(29,737,000)
Long-term debt, net of current portion	1,672,749,000	1,650,503,000
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	30,719,000
2015	405,059,000
2016	280,000,000
2017	0
2018	475,190,000
Thereafter	507,420,000
Total	1,698,388,000
Face amount					225,000,000.0		225,000,000.0							200,000,000.0			199,800,000			417,700,000				250,000,000.0	500,000,000							225,000,000.0			150,000,000.0				344,200,000			10,000,000.0			20,000,000.0		7,400,000	7,400,000
Amount of debt repurchased																												69,000,000									69,000,000
Refinancing costs																									12,800,000
Losses on early exchange of debt, previously capitalized transaction costs	7,300,000
Losses on early exchange of debt, transaction costs not previously capitalized	3,800,000
Capitalized refinancing costs																										$ 8,600,000