CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Cash flows provided by (used in) operating activities:
Net income		$ 76,417	$ 133,077	$ 92,139
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization		74,443	73,913	77,580
Relinquishment liability reassessment		0	0	(243)
Accretion of discount to the relinquishment liability		0	0	227
Cash paid for accretion of discount to the relinquishment liability	[1]	0	0	(778)
Accretion of discount to the redemption liability		3,840	0	0
Loss on modification and early extinguishment of debt, net		65,216	207	2,269
Proceeds from bond premiums		0	0	2,125
Amortization of debt issuance costs, premiums and discounts		7,192	10,020	7,771
Provision (recovery) for losses on receivables		(5,838)	(3,788)	5,878
Share-based compensation		7,569	6,147	0
Impairment		0	1,875	2,502
Loss on disposition of assets		58	180	1,018
Loss from unconsolidated affiliates		1,509	939	972
Gain on foreign currency exchange rate		0	(704)	0
Changes in operating assets and liabilities:
Increase in receivables		(429)	(13,252)	(5,340)
(Increase) decrease in inventories		360	234	(1,002)
Increase in other assets		(13,055)	(11,237)	(12,152)
Increase (decrease) in trade payables		1,606	(1,268)	(8,984)
Increase (decrease) in accrued interest		13,515	(6,543)	(410)
Increase in other liabilities		1,833	11,584	8,740
Net cash flows provided by operating activities		234,236	201,384	172,312
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including increase (decrease) in construction payables of $16,034, $(4,675) and $7,305, respectively		(85,499)	(53,637)	(22,460)
Issuance of third-party loans and advances		(2,056)	(5,269)	(4,080)
Payments received on third-party loans and advances		177	13,566	157
(Increase) decrease in restricted cash and cash equivalents, net		37,211	(197,496)	(1,526)
Proceeds from asset sales		247	335	1,615
Investments in unconsolidated affiliates		(3,833)	(2,700)	0
Payment of franchise fee		(30)	0	0
Investments in the New England Black Wolves		0	0	(500)
Net cash flows used in investing activities		(53,783)	(245,201)	(26,794)
Cash flows provided by (used in) financing activities:
Borrowings from Mohegan Tribe		0	22,500	0
Repayments to Mohegan Tribe		(12,920)	(27,000)	(2,250)
Repayments of other long-term debt		(785,465)	(734)	(189,517)
Payments on capital lease obligations		(1,521)	(824)	(927)
Principal portion of relinquishment liability payments		0	0	(24,400)
Distributions to Mohegan Tribe		(60,000)	(53,000)	(50,000)
Distributions from Salishan-Mohegan, LLC to Mohegan Tribe		(512)	0	0
Payments of tender offer and repurchase costs		(50,308)	0	0
Payments of financing fees		(25,811)	(7,348)	(2,360)
Non-controlling interest contributions		0	97,892	0
Net cash flows provided by (used in) financing activities		(175,133)	59,676	(128,872)
Net increase (decrease) in cash and cash equivalents		5,320	15,859	16,646
Effect of exchange rate on cash and cash equivalents		(110)	2,130	0
Cash and cash equivalents at beginning of year		83,743	65,754	49,108
Cash and cash equivalents at end of year		88,953	83,743	65,754
Supplemental disclosures:
Cash paid during the year for interest		93,816	132,730	136,541
Noncash Increase In Redemption Liability		68,511	0	0
Non-cash payments received - Cowlitz Tribal Gaming Authority		0	6,000	0
Credit Facility | Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		35,000	560,000	442,000
Credit Facility repayments		(48,000)	(568,000)	(458,000)
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit Facility repayments		(99,986)	(14,075)	(7,813)
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		0	0	87,911
Credit Facility repayments		(778,175)	(30,875)	(5,475)
Credit Facility | New Revolving Facility
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		430,000	0	0
Credit Facility repayments		(430,000)	0	0
Credit Facility | New Term Loan A Facility
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		441,965	0	0
Credit Facility repayments		(50,062)	0	0
Credit Facility | New Term Loan B Facility
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		777,150	0	0
Credit Facility repayments		(5,887)	0	0
Credit Facility | Bank of America, N.A. Prior Line of Credit
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		9,735	459,701	446,935
Credit Facility repayments		(9,735)	(459,701)	(449,976)
Credit Facility | Bank of America, N.A. Line of Credit
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		619,366	0	0
Credit Facility repayments		(619,366)	0	0
Credit Facility | Mohegan Expo Credit Facility, due April 2022, net of debt issuance costs of $1,683 as of September 30, 2017
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		14,700	0	0
Credit Facility | New Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit Facility borrowings		0	25,000	0
Credit Facility repayments		(21,656)	(3,344)	0
Credit Facility | Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit Facility repayments		0	(40,516)	0
Credit Facility | Senior Secured Credit Facility, Tern Loan A and Term Loan B
Supplemental disclosures:
Non-cash repayments		0	5,179	4,397
Senior Unsecured Notes
Cash flows provided by (used in) financing activities:
Proceeds from issuance of Senior Unsecured Notes, net of premiums and discounts		496,355	100,000	85,000
Promissory Notes | 2012 Mohegan Tribe Minor's Trust Promissory Note
Supplemental disclosures:
Non-cash repayments		$ 0	$ 6,000	$ 0

[1] Reflects accretion of the discount to the present value of the relinquishment liability for the impact of the time value of money.