LONG-TERM DEBT - Schedule and Introduction (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Credit Facility Prior Bank Credit Facility	Sep. 30, 2013 Credit Facility Prior Bank Credit Facility	Jun. 30, 2014 Credit Facility Prior Term Loan Facility, net of discount of $3,005	Sep. 30, 2013 Credit Facility Prior Term Loan Facility, net of discount of $3,005	Jun. 30, 2014 Credit Facility Senior Secured Credit Facility - Revolving, due June 2018	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Revolving, due June 2018	Jun. 30, 2014 Credit Facility Senior Secured Credit Facility - Term Loan A, due June 2018, net of discount of $562	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Term Loan A, due June 2018, net of discount of $562	Jun. 30, 2014 Credit Facility Senior Secured Credit Facility - Term Loan B, due June 2018, net of discount of $8,841	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Term Loan B, due June 2018, net of discount of $8,841	Jun. 30, 2014 Credit Facility Downs Lodging Credit Facility, due July 2016	Sep. 30, 2013 Credit Facility Downs Lodging Credit Facility, due July 2016	Jun. 30, 2014 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, net of discount of $5	Sep. 30, 2013 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, net of discount of $5	Oct. 31, 2009 Senior Secured Notes 2009 11 1/2% Second Lien Senior Secured Notes, net of discount of $5	Jun. 30, 2014 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, net of discount of $8,898	Sep. 30, 2013 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, net of discount of $8,898	Mar. 31, 2012 Senior Secured Notes 2012 11 1/2% Second Lien Senior Secured Notes, net of discount of $8,898	Aug. 31, 2013 Senior Secured Notes 2013 9 3/4% Senior Unsecured Notes, due September 2021	Jun. 30, 2014 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	Jun. 30, 2014 Senior Subordinated Notes 2004 7 1/8% Senior Subordinated Notes, due August 2014	Sep. 30, 2013 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, 2014 Senior Subordinated Notes 2005 6 7/8% Senior Subordinated Notes, due February 2015	Sep. 30, 2013 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, 2014 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $3,679 and $4,168, respectively	Sep. 30, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $3,679 and $4,168, respectively	Aug. 31, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $3,679 and $4,168, respectively	Mar. 31, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $3,679 and $4,168, respectively	Jun. 30, 2014 Promissory Notes 2009 Mohegan Tribe Promissory Note, due September 2014	Sep. 30, 2013 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, 2014 Promissory Notes 2012 Mohegan Tribe Minor's Trust Promissory Note, due March 2016	Sep. 30, 2013 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	Jun. 30, 2014 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Sep. 30, 2013 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Mar. 31, 2013 Promissory Notes 2013 Mohegan Tribe Promissory Note, due December 2018	Jun. 30, 2014 Other	Sep. 30, 2013 Other
Debt Schedule [Abstract]
Long-term debt, excluding capital leases	$ 1,735,303	$ 1,682,312	$ 0	$ 393,000	$ 0	$ 221,995	$ 20,000	$ 0	$ 121,313	$ 0	$ 717,509	$ 0	$ 45,000	$ 45,000	$ 0	$ 195		$ 0	$ 190,902			$ 500,000	$ 500,000	$ 21,156	$ 21,156		$ 9,654	$ 9,654		$ 271,511	$ 271,022			$ 1,750	$ 3,500		$ 17,000	$ 18,000		$ 7,420	$ 7,420		$ 2,990	$ 468
Less: current portion of long-term debt	(48,029)	(30,719)
Long-term debt, net of current portion	1,687,274	1,651,593
Unamortized discount					$ 3,005	$ 3,005			$ 562	$ 562	$ 8,841	$ 8,841			$ 5	$ 5		$ 8,898	$ 8,898											$ 3,679	$ 4,168
Note stated interest rate															11.50%	11.50%	11.50%	11.50%	11.50%	11.50%	9.75%	9.75%	9.75%	7.125%	7.125%	7.125%	6.875%	6.875%	6.875%	11.00%	11.00%	11.00%	11.00%			10.00%			10.00%			4.00%