CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 28,690	$ (52,241)
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	20,207	18,212
Accretion of discount to the Redemption Liability	1,733	0
Loss on modification and early extinguishment of debt, net	0	65,218
Amortization of debt issuance costs, premiums and discounts	2,270	1,843
Provision for losses on receivables	832	653
(Gain) loss on disposition of assets	(79)	20
(Income) loss from unconsolidated affiliates	(175)	731
Loss on foreign currency exchange rate	0	3
Changes in operating assets and liabilities:
Increase in receivables	(898)	(942)
Increase in inventories	(507)	(132)
Increase in other assets	(5,943)	(4,062)
Decrease in trade payables	(2,078)	(2,196)
Increase (decrease) in accrued interest	(9,601)	3,368
Decrease in other liabilities	(2,922)	(3,302)
Net cash flows provided by operating activities	31,529	27,173
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including increase (decrease) in construction payables of $3,370 and $(5,055), respectively	(44,387)	(15,702)
Issuance of third-party loans and advances	(309)	(446)
Payments received on third-party loans and advances	46	43
Decrease in restricted cash and cash equivalents, net	12,446	2,681
Proceeds from asset sales	123	29
Investments in unconsolidated affiliates	(1,225)	(325)
Net cash flows used in investing activities	(33,306)	(13,720)
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe	0	(12,920)
Repayments of other long-term debt	(69)	(785,259)
Payments on capital lease obligations	0	(1,521)
Distributions to Mohegan Tribe	(12,000)	(12,000)
Payments of Distributions to Affiliates From Related Party	(390)	0
Payments of tender offer and repurchase costs	0	(50,308)
Payments of financing fees	(19)	(22,092)
Net cash flows provided by financing activities	25,722	17,553
Net increase in cash and cash equivalents	23,945	31,006
Effect of exchange rate on cash and cash equivalents	122	(3)
Cash and cash equivalents at beginning of period	88,953	83,743
Cash and cash equivalents at end of period	113,020	114,746
Supplemental disclosures:
Cash paid during the period for interest	36,026	24,826
Conversion of Redemption Liability to Redemption Note Payable	74,084	0
Credit Facility | Prior Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	0	35,000
Credit facility/line of credit repayments	0	(48,000)
Credit Facility | Prior Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	0	(99,986)
Credit Facility | Prior Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	0	(778,175)
Credit Facility | Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	62,000	210,000
Credit facility/line of credit repayments	(27,000)	(111,000)
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	0	441,965
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	0	777,150
Credit Facility | Prior Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	0	9,735
Credit facility/line of credit repayments	0	(9,735)
Credit Facility | Bank of America, N.A. Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	164,879	138,613
Credit facility/line of credit repayments	(164,879)	(138,613)
Credit Facility | Mohegan Expo Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	3,200	0
Credit Facility | Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	0	(21,656)
Credit Facility | Senior Secured Credit Facility, Term Loan A and B
Supplemental disclosures:
Non-cash repayments	18,650	18,651
Senior Unsecured Notes
Cash flows provided by (used in) financing activities:
Proceeds from issuance of Senior Unsecured Notes, net of discount	$ 0	$ 496,355