SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012	Sep. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments	2
Net revenues	$ 312,823	$ 324,755
Income (loss) from operations	33,273	52,199
Accretion of discount to the relinquishment liability	(551)	(1,243)
Interest income	1,644	1,457
Interest expense, net of capitalized interest	(38,969)	(43,274)
Loss on early extinguishment of debt	(62,083)	(8)
Other expense, net	(704)	(945)
Net income (loss)	(67,390)	8,186
Loss attributable to non-controlling interests	136	914
Net income (loss) attributable to Mohegan Tribal Gaming Authority	(67,254)	9,100
Capital expenditures incurred	15,530	13,691
Total assets	2,132,857		2,136,150
Operating segments
Segment Reporting Information [Line Items]
Net revenues	312,823	324,755
Income (loss) from operations	33,273	52,199
Inter-segment revenues
Segment Reporting Information [Line Items]
Net revenues	(532)	0
Segment reconciling items
Segment Reporting Information [Line Items]
Accretion of discount to the relinquishment liability	(551)	(1,243)
Interest income	1,644	1,457
Interest expense, net of capitalized interest	(38,969)	(43,274)
Loss on early extinguishment of debt	(62,083)	(8)
Other expense, net	(704)	(945)
Mohegan Sun
Segment Reporting Information [Line Items]
Capital expenditures incurred	5,039	4,301
Total assets	1,421,338		1,425,152
Mohegan Sun | Operating segments
Segment Reporting Information [Line Items]
Net revenues	241,933	253,190
Income (loss) from operations	34,643	48,126
Mohegan Sun at Pocono Downs
Segment Reporting Information [Line Items]
Capital expenditures incurred	987	2,133
Total assets	565,808		558,700
Mohegan Sun at Pocono Downs | Operating segments
Segment Reporting Information [Line Items]
Net revenues	70,683	71,288
Income (loss) from operations	7,577	9,558
Corporate and other
Segment Reporting Information [Line Items]
Capital expenditures incurred	9,504	7,257
Total assets	145,711		152,298
Corporate and other | Operating segments
Segment Reporting Information [Line Items]
Net revenues	739	277
Income (loss) from operations	$ (8,947)	$ (5,485)