CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Gaming		$ 1,179,865	$ 1,166,886	$ 1,133,720
Food and beverage		90,310	88,923	89,720
Hotel		63,518	52,561	50,496
Retail, entertainment and other		151,657	123,017	115,030
Gross revenues		1,485,350	1,431,387	1,388,966
Less-Promotional allowances		(105,347)	(96,593)	(97,346)
Net revenues		1,380,003	1,334,794	1,291,620
Operating costs and expenses:
Gaming	[1]	670,692	661,629	651,900
Food and beverage		41,041	40,437	41,554
Hotel		27,713	16,018	14,934
Retail, entertainment and other		57,978	42,608	45,779
Advertising, general and administrative	[1]	203,922	200,447	188,924
Corporate	[1]	44,749	35,821	31,127
Depreciation and amortization		74,443	73,913	77,580
Loss on disposition of assets		58	180	1,018
Severance		0	0	3,370
Pre-opening		2,172	723	0
Impairment		0	1,875	2,502
Relinquishment liability reassessment		0	0	(243)
Total operating costs and expenses		1,122,768	1,073,651	1,058,445
Income (loss) from operations		257,235	261,143	233,175
Other income (expense):
Accretion of discount to the redemption liability		(3,840)	0	0
Accretion of discount to the relinquishment liability		0	0	(227)
Interest income		13,732	9,560	7,983
Interest expense, net of capitalized interest		(114,319)	(136,194)	(143,876)
Loss on modification and early extinguishment of debt		(74,888)	(484)	(3,987)
Loss from unconsolidated affiliates		(1,509)	(939)	(972)
Other income (expense), net		6	(9)	43
Total other expense		(180,818)	(128,066)	(141,036)
Net income		76,417	133,077	92,139
(Income) loss attributable to non-controlling interests		(972)	(427)	2,255
Net income attributable to Mohegan Tribal Gaming Authority		75,445	132,650	94,394
Comprehensive income:
Foreign currency translation adjustment		(8,446)	10,495	0
Other comprehensive income (loss)		(8,446)	10,495	0
Other comprehensive (income) loss attributable to non-controlling interests		4,465	(5,389)	0
Other comprehensive income (loss) attributable to Mohegan Tribal Gaming Authority		(3,981)	5,106	0
Comprehensive income attributable to Mohegan Tribal Gaming Authority		$ 71,464	$ 137,756	$ 94,394

[1] These financial statement line items include costs and expenses associated with related party transactions (refer to Note 8).