CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Gaming		$ 288,735	$ 293,736	$ 575,741	$ 578,811
Food and beverage		21,170	21,731	42,990	44,787
Hotel		14,957	14,919	29,864	29,622
Retail, entertainment and other		29,849	29,508	62,737	63,973
Gross revenues		354,711	359,894	711,332	717,193
Less-Promotional allowances		(22,694)	(23,070)	(47,831)	(49,377)
Net revenues		332,017	336,824	663,501	667,816
Operating costs and expenses:
Gaming	[1]	161,801	160,200	326,116	329,582
Food and beverage		10,180	10,241	20,369	20,570
Hotel	[1]	6,647	6,971	13,652	13,174
Retail, entertainment and other		9,589	11,582	21,206	26,969
Advertising, general and administrative	[1]	49,595	50,193	99,972	100,589
Corporate	[1]	14,090	20,260	26,243	31,448
Depreciation and amortization		19,828	18,090	40,035	36,302
(Gain) loss on disposition of assets		410	(111)	331	(91)
Severance		2,792	0	2,792	0
Pre-opening		1,013	(26)	1,713	429
Total operating costs and expenses		275,945	277,400	552,429	558,972
Income from operations		56,072	59,424	111,072	108,844
Accretion of discounts		(65)	0	(1,798)	0
Other income (expense):
Interest income		3,877	2,678	7,746	5,578
Interest expense, net of capitalized interest		(30,806)	(28,594)	(59,142)	(58,629)
Loss on modification and early extinguishment of debt		0	0	0	(73,796)
Loss from unconsolidated affiliates		(596)	(2,114)	(421)	(2,845)
Other income (expense), net		(63)	2	(348)	3
Total other expense		(27,653)	(28,028)	(53,963)	(129,689)
Net income (loss)		28,419	31,396	57,109	(20,845)
Loss attributable to non-controlling interests		189	74	708	693
Net income (loss) attributable to Mohegan Tribal Gaming Authority		28,608	31,470	57,817	(20,152)
Comprehensive income (loss):
Foreign currency translation adjustment		1,460	15,009	16,207	(3,301)
Other comprehensive income (loss)		1,460	15,009	16,207	(3,301)
Other comprehensive (income) loss attributable to non-controlling interests		(708)	(7,804)	(9,026)	1,609
Other comprehensive income (loss) attributable to Mohegan Tribal Gaming Authority		752	7,205	7,181	(1,692)
Comprehensive income (loss) attributable to Mohegan Tribal Gaming Authority		$ 29,360	$ 38,675	$ 64,998	$ (21,844)

[1] These financial statement line items include costs and expenses associated with related party transactions (refer to Note 4).