CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows provided by (used in) operating activities:
Net loss	$ (42,734)	$ (130,607)
Adjustments to reconcile net loss to net cash flows provided by (used in) operating activities:
Depreciation and amortization	52,362	56,370
Non-cash operating lease expense	6,208	6,403
Loss on modification and early extinguishment of debt	23,725	0
Accretion of discounts	627	584
Amortization of discounts and debt issuance costs	11,182	9,256
Provision for losses on receivables	2,642	1,977
Impairment of Mohegan Sun Pocono's intangible assets	0	126,596
Deferred income taxes	(6,989)	(484)
Other, net	(5,917)	1,063
Changes in operating assets and liabilities, net of effect of the MGE Niagara Resorts acquisition:
Accounts receivable	(7,457)	13,057
Inventories	(434)	1,297
Due from Ontario Lottery and Gaming Corporation	(3,058)	1,910
Casino Operating and Services Agreement customer contract asset	5,111	(76,290)
Other assets	691	8,847
Trade payables	1,982	10,755
Accrued interest	9,931	(55)
Due to Ontario Lottery and Gaming Corporation	4,316	1,868
Operating lease liabilities	8,282	(3,861)
Other liabilities	6,721	(45,549)
Net cash flows provided by (used in) operating activities	67,191	(16,863)
Cash flows used in investing activities:
Purchases of property and equipment	(36,319)	(54,630)
Acquisition of the MGE Niagara Resorts, net of cash acquired	0	(1,666)
Other, net	790	(1,172)
Net cash flows used in investing activities	(35,529)	(68,218)
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 repayments	(14,240)	(11,617)
Payments on finance lease obligations	(536)	(828)
Payments of financing fees	(24,082)	0
Other, net	(1,000)	(1,527)
Net cash flows provided by (used in) financing activities	(25,027)	104,604
Net increase in cash, cash equivalents, restricted cash and restricted cash equivalents	6,635	19,523
Effect of exchange rate on cash, cash equivalents, restricted cash and restricted cash equivalents	1,601	(3,567)
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	150,305	296,685
Reconciliation of cash, cash equivalents, restricted cash and restricted cash equivalents to the condensed consolidated balance sheets:
Cash, cash equivalents, restricted cash and restricted cash equivalents	150,305	296,685
Supplemental disclosures:
Cash paid for interest	63,195	61,583
Non-cash transactions:
Right-of-use operating lease assets	24,740	360,257
Right-of-use operating lease obligations	24,082	360,402
Finance lease assets and obligations	78,682	2,206
Construction payables	35,974	45,395
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	311,764	0
Credit facility repayments	(185,749)	0
Non-cash transactions:
Reductions	3,000	0
Credit Facility | Prior Senior Secured Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility borrowings	156,287	665,725
Credit facility repayments	(353,287)	(520,725)
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)	(26,590)
Term Loan | MGE Niagara Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility repayments	(1,970)	(1,848)
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	(24,000)	(24,000)
Salishan Company, LLC
Cash flows provided by (used in) financing activities:
Distributions to Mohegan Tribe	$ (261)	$ (413)