SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013	Sep. 30, 2013
Segment Reporting [Abstract]
Number of reportable segments			2
Segment Reporting Information [Line Items]
Net revenues	$ 326,336	$ 344,245	$ 955,842	$ 994,695
Income (loss) from operations	48,982	64,187	127,338	172,352
Accretion of discount to the relinquishment liability	(552)	(1,243)	(1,654)	(3,730)
Interest income	1,701	1,533	4,947	4,421
Interest expense, net of capitalized interest	(36,426)	(42,379)	(111,692)	(128,213)
Loss on early extinguishment of debt	(2)	0	(62,277)	(403)
Other income (expense), net	59	53	(819)	(1,732)
Net income (loss)	13,762	22,151	(44,157)	42,695
Loss attributable to non-controlling interests	130	146	421	2,767
Net income (loss) attributable to Mohegan Tribal Gaming Authority	13,892	22,297	(43,736)	45,462
Capital expenditures incurred			26,984	43,221
Total assets	2,102,480		2,102,480		2,136,150
Mohegan Sun
Segment Reporting Information [Line Items]
Net revenues	248,866	266,699	734,277	772,571
Income (loss) from operations	47,088	57,396	127,459	158,654
Capital expenditures incurred			15,204	16,821
Total assets	1,392,204		1,392,204		1,425,152
Mohegan Sun at Pocono Downs
Segment Reporting Information [Line Items]
Net revenues	77,194	77,228	220,863	221,155
Income (loss) from operations	9,936	12,435	26,555	32,441
Capital expenditures incurred			2,808	3,260
Total assets	551,995		551,995		558,700
Corporate and other
Segment Reporting Information [Line Items]
Net revenues	1,549	318	3,780	969
Income (loss) from operations	(8,042)	(5,644)	(26,676)	(18,743)
Capital expenditures incurred			8,972	23,140
Total assets	158,281		158,281		152,298
Intersegment Elimination
Segment Reporting Information [Line Items]
Net revenues	$ (1,273)	$ 0	$ (3,078)	$ 0