CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statements of Changes in Capital
Total capital at beginning of period	$ (133,242)	$ (67,989)
Net loss	(11,609)	(26,761)
Foreign currency translation adjustment	(4,976)	20,977
Distributions to Mohegan Tribe	(14,000)	(12,000)
Distributions to Salishan Company, LLC related to the Cowlitz Project	(340)	(261)
Other		(7,568)
Total capital at end of period	(164,167)	(93,602)
Retained Earnings (Deficit)
Statements of Changes in Capital
Total capital at beginning of period	(133,087)	(75,692)
Net loss	(11,680)	(26,621)
Distributions to Mohegan Tribe	(14,000)	(12,000)
Distributions to Salishan Company, LLC related to the Cowlitz Project	(340)	(261)
Total capital at end of period	(159,107)	(114,574)
Accumulated Other Comprehensive Income (Loss)
Statements of Changes in Capital
Total capital at beginning of period	(2,065)	223
Foreign currency translation adjustment	(4,976)	19,601
Total capital at end of period	(7,041)	19,824
Total Capital Attributable to Mohegan Tribal Gaming Authority
Statements of Changes in Capital
Total capital at beginning of period	(135,152)	(75,469)
Net loss	(11,680)	(26,621)
Foreign currency translation adjustment	(4,976)	19,601
Distributions to Mohegan Tribe	(14,000)	(12,000)
Distributions to Salishan Company, LLC related to the Cowlitz Project	(340)	(261)
Total capital at end of period	(166,148)	(94,750)
Non-controlling Interests
Statements of Changes in Capital
Total capital at beginning of period	1,910	7,480
Net loss	71	(140)
Foreign currency translation adjustment		1,376
Other		(7,568)
Total capital at end of period	$ 1,981	$ 1,148