CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2010
Revenues:
Gaming	$ 284,713		$ 284,801	$ 837,463	$ 837,954
Food and beverage	23,021		23,273	66,811	68,605
Hotel	12,700		12,160	37,199	34,763
Retail, entertainment and other	29,825		31,542	82,231	87,065
Gross revenues	350,259		351,776	1,023,704	1,028,387
Less-Promotional allowances	(25,220)		(25,440)	(71,510)	(72,545)
Net revenues	325,039		326,336	952,194	955,842
Operating costs and expenses:
Gaming	164,229		171,533	485,994	513,574
Food and beverage	10,323		10,359	31,363	31,207
Hotel	3,788		3,950	10,767	11,744
Retail, entertainment and other	12,447		13,318	34,268	37,446
Advertising, general and administrative	46,522		48,929	140,946	143,740
Corporate	7,119		9,259	23,400	29,551
Depreciation and amortization	19,086		20,070	58,703	60,067
(Gain) loss on disposition of assets	26		(64)	845	(12)
Severance	0		0	3,370	0
Pre-opening	0		0	0	1,187
Impairment of Project Horizon	0	$ 2,500	0	2,502	0	$ 5,000	$ 58,100
Relinquishment liability reassessment	0		0	(243)	0
Total operating costs and expenses	263,540		277,354	791,915	828,504
Income from operations	61,499		48,982	160,279	127,338
Other income (expense):
Accretion of discount to the relinquishment liability	0		(552)	(227)	(1,654)
Interest income	1,906		1,701	5,554	4,947
Interest expense, net of capitalized interest	(35,660)		(36,426)	(107,692)	(111,692)
Loss on early extinguishment of debt	0		(2)	0	(62,277)
Other income (expense), net	(50)		59	(1,260)	(819)
Total other expense	(33,804)		(35,220)	(103,625)	(171,495)
Net income (loss)	27,695		13,762	56,654	(44,157)
Loss attributable to non-controlling interests	439		130	1,278	421
Net income (loss) attributable to Mohegan Tribal Gaming Authority	$ 28,134		$ 13,892	$ 57,932	$ (43,736)