CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows provided by (used in) operating activities:
Net loss	$ (16,832)	$ (180,536)
Adjustments to reconcile net loss to net cash flows provided by (used in) operating activities:
Depreciation and amortization	79,502	82,847
Non-cash operating lease expense	9,072	9,364
Loss on modification and early extinguishment of debt	23,725	0
Accretion of discounts	974	857
Amortization of discounts and debt issuance costs	15,309	13,977
Provision for losses on receivables	3,493	2,676
Impairment of Mohegan Sun Pocono's intangible assets	0	126,596
Deferred income taxes	(10,382)	(3,262)
Other, net	(6,612)	2,255
Changes in operating assets and liabilities, net of effect of the MGE Niagara Resorts acquisition:
Accounts receivable	(7,823)	1,237
Inventories	(689)	714
Due from Ontario Lottery and Gaming Corporation	(194)	5,482
Casino Operating and Services Agreement customer contract asset	6,185	(78,210)
Other assets	(328)	398
Trade payables	2,565	6,672
Accrued interest	23,421	(5,402)
Due to Ontario Lottery and Gaming Corporation	6,101	3,598
Operating lease liabilities	13,016	(162)
Other liabilities	4,617	(22,713)
Net cash flows provided by (used in) operating activities	145,120	(33,612)
Cash flows used in investing activities:
Purchases of property and equipment	(33,358)	(104,384)
Acquisition of the MGE Niagara Resorts, net of cash acquired	0	(1,666)
Other, net	1,206	(1,171)
Net cash flows used in investing activities	(32,152)	(117,971)
Cash flows provided by (used in) financing activities:
Proceeds from Main Street term loan facility, net of discounts	48,108	0
Repayment of Main Street term loan facility	(50,000)	0
Proceeds from issuance of senior secured notes	1,175,000	0
Repayment of Mohegan Tribe subordinated loan	(5,000)	0
Other borrowings	694	2,845
Other repayments	(21,303)	(14,230)
Payments on finance lease obligations	(808)	(1,034)
Contribution from Mohegan Tribe	2,814	0
Payments of financing fees	(24,082)	(34)
Other, net	(1,000)	(1,527)
Net cash flows provided by (used in) financing activities	(81,050)	84,579
Net increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	31,918	(67,004)
Effect of exchange rate on cash, cash equivalents, restricted cash and restricted cash equivalents	1,625	(1,444)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period	142,069	280,729
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	175,612	212,281
Reconciliation of cash, cash equivalents, restricted cash and restricted cash equivalents to the condensed consolidated balance sheets:
Cash and cash equivalents	158,406	149,435
Restricted cash and cash equivalents, current	2,002	1,698
Restricted cash and cash equivalents, non-current	15,204	61,148
Cash, cash equivalents, restricted cash and restricted cash equivalents	175,612	212,281
Supplemental disclosures:
Cash paid for interest	86,810	95,211
Non-cash transactions:
Right-of-use operating lease assets	24,787	360,933
Right-of-use operating lease obligations	24,154	361,078
Finance lease assets and obligations	79,102	2,511
Construction payables	44,735	46,236
MGE Niagara Resorts - derecognition of build-to-suit asset and liability	0	90,675
MGE Niagara Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility borrowings	0	77,537
Credit facility repayments	0	(51,110)
Credit Facility | New Senior Secured Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility borrowings	540,866	0
Credit facility repayments	(450,866)	0
Non-cash transactions:
Reductions	45,000	0
Credit Facility | Prior Senior Secured Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility borrowings	156,287	807,525
Credit facility repayments	(353,287)	(662,525)
Non-cash transactions:
Reductions	0	10,514
Credit Facility | Senior Secured Credit Facility, Term Loan A and B
Cash flows provided by (used in) financing activities:
Credit facility repayments	(1,056,061)	(37,104)
Term Loan | MGE Niagara Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility repayments	(2,992)	(2,770)
Mohegan Hotel Holding, LLC
Cash flows used in investing activities:
Investment in Mohegan Hotel Holding, LLC	0	(10,750)
Mohegan Tribe
Cash flows provided by (used in) financing activities:
Distributions to Mohegan Tribe	(39,000)	(32,333)
Salishan Company, LLC
Cash flows provided by (used in) financing activities:
Distributions to Mohegan Tribe	$ (420)	$ (661)