CONDENSED CONSOLIDATED STATEMENTS OF LOSS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Net revenues	$ 278,628	$ 314,701	$ 509,409	$ 713,753
Operating costs and expenses:
Advertising, general and administrative, including related party transactions of $6,097, $9,046, $16,277 and $18,612, respectively	49,790	62,882	98,504	137,096
Corporate, including related party transactions of $1,516, $2,128, $3,264 and $4,381, respectively	12,887	10,169	23,992	24,259
Depreciation and amortization	26,388	27,826	52,362	56,370
Impairment of Mohegan Sun Pocono's intangible assets	0	126,596	0	126,596
Other, net	9,498	3,274	17,806	6,344
Total operating costs and expenses	233,772	420,956	453,943	776,583
Income (loss) from operations	44,856	(106,255)	55,466	(62,830)
Other income (expense):
Interest income	6	528	4	1,279
Interest expense, net of capitalized interest	(42,442)	(30,996)	(84,327)	(66,352)
Loss on modification and early extinguishment of debt	(23,886)	0	(23,958)	0
Other, net	2,269	(2,432)	3,292	(3,024)
Total other expense	(64,053)	(32,900)	(104,989)	(68,097)
Loss before income tax	(19,197)	(139,155)	(49,523)	(130,927)
Income tax benefit (provision)	3,224	(876)	6,789	320
Net loss	(15,973)	(140,031)	(42,734)	(130,607)
(Income) loss attributable to non-controlling interests	(16)	(63)	124	(93)
Net loss attributable to Mohegan Tribal Gaming Authority	(15,989)	(140,094)	(42,610)	(130,700)
Comprehensive income (loss):
Foreign currency translation adjustment	(10,533)	(18,581)	10,444	(7,164)
Other comprehensive income (loss)	(10,533)	(18,581)	10,444	(7,164)
Other comprehensive (income) loss attributable to non-controlling interests	0	739	(1,376)	208
Other comprehensive income (loss) attributable to Mohegan Tribal Gaming Authority	(10,533)	(17,842)	9,068	(6,956)
Comprehensive loss attributable to Mohegan Tribal Gaming Authority	(26,522)	(157,936)	(33,542)	(137,656)
Gaming
Revenues:
Net revenues	209,184	215,994	382,385	480,263
Operating costs and expenses:
Operating costs and expenses	108,567	131,178	207,066	288,366
Food and beverage
Revenues:
Net revenues	13,343	37,557	24,383	88,089
Operating costs and expenses:
Operating costs and expenses	11,610	32,392	23,096	74,085
Hotel
Revenues:
Net revenues	17,170	20,115	33,694	47,704
Operating costs and expenses:
Operating costs and expenses	8,189	10,473	16,981	22,315
Retail, entertainment and other
Revenues:
Net revenues	38,931	41,035	68,947	97,697
Operating costs and expenses:
Operating costs and expenses	$ 6,843	$ 16,166	$ 14,136	$ 41,152