LONG-TERM DEBT - Schedule and Introduction (Details) (USD $)	3 Months Ended			0 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Nov. 19, 2013 Prior Bank Credit Facilities and 2009 and 2012 Second Lien Senior Secured Notes [Member]	Dec. 31, 2013 Prior Bank Credit Facilities and 2009 and 2012 Second Lien Senior Secured Notes [Member]	Dec. 31, 2013 Credit Facility Prior Bank Credit Facility	Sep. 30, 2013 Credit Facility Prior Bank Credit Facility	Dec. 31, 2013 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	Dec. 31, 2013 Credit Facility Senior Secured Credit Facility - Revolving, due July 2018	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Revolving, due July 2018	Dec. 31, 2013 Credit Facility Senior Secured Credit Facility - Term Loan A, due July 2018, net of discount of $642	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Term Loan A, due July 2018, net of discount of $642	Dec. 31, 2013 Credit Facility Senior Secured Credit Facility - Term Loan B, due July 2018, net of discount of $9,899	Sep. 30, 2013 Credit Facility Senior Secured Credit Facility - Term Loan B, due July 2018, net of discount of $9,899	Dec. 31, 2013 Credit Facility Line of Credit	Sep. 30, 2013 Credit Facility Line of Credit	Dec. 31, 2013 Credit Facility Downs Lodging Credit Facility, due July 2016	Sep. 30, 2013 Credit Facility Downs Lodging Credit Facility, due July 2016	Dec. 31, 2013 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	Dec. 31, 2013 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	Dec. 31, 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	Dec. 31, 2013 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	Dec. 31, 2013 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	Dec. 31, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,010 and $4,168, respectively	Sep. 30, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,010 and $4,168, respectively	Aug. 31, 2013 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,010 and $4,168, respectively	Mar. 06, 2012 Senior Subordinated Notes 2012 11 % Senior Subordinated Notes, due September 2018, net of discount of $4,010 and $4,168, respectively	Dec. 31, 2013 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	Dec. 31, 2013 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	Dec. 31, 2013 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	Dec. 31, 2013 Other	Sep. 30, 2013 Other
Debt Schedule [Abstract]
Note stated interest rate																				11.50%		11.50%	11.50%		11.50%	9.75%	9.75%		7.125%		7.125%	6.875%		6.875%	11.00%		11.00%	11.00%			10.00%			10.00%			4.00%
Unamortized discount				$ 9,700,000					$ 3,005,000			$ 642,000		$ 9,899,000							$ 5,000			$ 8,898,000											$ 4,010,000	$ 4,168,000
Long-term debt, excluding capital leases	1,745,491,000		1,682,312,000			0	393,000,000	0	221,995,000	14,000,000	0	124,358,000	0	720,101,000	0	9,353,000	0	45,000,000	45,000,000	0	195,000		0	190,902,000			500,000,000	500,000,000	21,156,000	21,156,000		9,654,000	9,654,000		271,180,000	271,022,000			2,625,000	3,500,000		17,500,000	18,000,000		7,420,000	7,420,000		3,144,000	468,000
Less: current portion of long-term debt	(50,444,000)		(30,719,000)
Long-term debt, net of current portion	1,695,047,000		1,651,593,000
Long-term Debt, Rolling Maturity [Abstract]
Less than 1 year	50,444,000
1-3 years	106,229,000
3-5 years	1,102,186,000
More than 5 years	501,183,000
Total	1,760,042,000
Long-term Debt, Refinancing Costs				60,900,000
Unamortized Debt Issuance Expense and Discount				22,400,000
Loss on early extinguishment of debt	62,083,000	8,000			39,700,000
Debt Issuance Cost				$ 11,500,000