CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 92,139,000	$ (24,558,000)	$ 47,542,000
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	77,580,000	80,126,000	80,317,000
Relinquishment liability reassessment	(243,000)	(1,905,000)	(249,000)
Accretion of discount to the relinquishment liability	227,000	2,205,000	4,974,000
Cash paid for accretion of discount to the relinquishment liability	(778,000)	(2,897,000)	(5,792,000)
Loss on early extinguishment of debt	2,269,000	58,245,000	4,531,000
Proceeds from bond premiums	2,125,000	0	0
Payments of tender offer costs and discounts	(2,894,000)	(48,155,000)	(3,104,000)
Amortization of debt issuance costs and accretion of bond premiums and discounts	7,771,000	8,037,000	12,285,000
Amortization of net deferred gain on settlement of derivative instruments	0	0	(76,000)
Provision for losses on receivables	5,878,000	6,146,000	3,436,000
Impairment of Project Horizon	2,502,000	4,981,000	0
(Gain) loss on disposition of assets	1,018,000	(9,000)	241,000
Loss from unconsolidated affiliates	972,000	826,000	1,553,000
Changes in operating assets and liabilities:
Increase in receivables	(5,340,000)	(7,159,000)	(648,000)
(Increase) decrease in inventories	(1,002,000)	(554,000)	448,000
(Increase) decrease in other assets	(12,152,000)	(3,531,000)	2,759,000
Increase (decrease) in trade payables	(8,984,000)	13,419,000	(2,143,000)
Decrease in accrued interest	(410,000)	(14,637,000)	(23,066,000)
Increase (decrease) in other liabilities	8,740,000	2,436,000	(20,057,000)
Net cash flows provided by operating activities	169,418,000	73,016,000	102,951,000
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including increase (decrease) in construction payables of $7,305, $(5,179) and $5,948, respectively	(22,460,000)	(35,079,000)	(59,597,000)
Issuance of third-party loans and advances	(4,080,000)	(1,804,000)	(2,033,000)
Payments received on third-party loans	157,000	644,000	139,000
(Increase) decrease in restricted cash, net	(1,526,000)	13,679,000	33,078,000
Proceeds from asset sales	1,615,000	134,000	216,000
Investments in the New England Black Wolves	(500,000)	0	0
Investments in unconsolidated affiliates	0	(29,000)	(4,971,000)
Net cash flows used in investing activities	(26,794,000)	(22,455,000)	(33,168,000)
Cash flows provided by (used in) financing activities:
Repayments to Mohegan Tribe	(2,250,000)	(3,250,000)	(9,950,000)
Proceeds from issuance of Senior Unsecured Notes, net of premiums	85,000,000
Repayments of other long-term debt	(186,816,000)	(212,323,000)	(495,601,000)
Principal portion of relinquishment liability payments	(24,400,000)	(46,574,000)	(45,350,000)
Distributions to Mohegan Tribe	(50,000,000)	(50,000,000)	(50,000,000)
Payments of financing fees	(2,360,000)	(12,395,000)	(11,957,000)
Payments on capital lease obligations	(927,000)	(2,168,000)	(3,385,000)
Net cash flows used in financing activities	(125,978,000)	(65,077,000)	(120,243,000)
Net increase (decrease) in cash and cash equivalents	16,646,000	(14,516,000)	(50,460,000)
Cash and cash equivalents at beginning of year	49,108,000	63,624,000	114,084,000
Cash and cash equivalents at end of year	65,754,000	49,108,000	63,624,000
Supplemental disclosures:
Cash paid during the year for interest	136,541,000	153,481,000	180,657,000
Repurchase of membership interest	0	0	7,420,000
Credit Facility | Prior Bank Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Line of Credit borrowings	0	0	3,000,000
Line of Credit repayments	0	0	(3,000,000)
Credit Facility | Prior Bank Credit Facility - Term
Cash flows provided by (used in) financing activities:
Line of Credit repayments	0	(393,000,000)	(4,000,000)
Credit Facility | Prior Term Loan Facility
Cash flows provided by (used in) financing activities:
Line of Credit repayments	0	(222,103,000)	0
Credit Facility | Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Line of Credit borrowings	442,000,000	310,000,000	0
Line of Credit repayments	(458,000,000)	(273,000,000)	0
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Line of Credit borrowings	0	124,343,000	0
Line of Credit repayments	(7,756,000)	(3,125,000)	0
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Line of Credit borrowings	87,911,000	720,952,000	0
Line of Credit repayments	(5,339,000)	(5,475,000)	0
Credit Facility | Bank of America, N.A. Line of Credit
Cash flows provided by (used in) financing activities:
Line of Credit borrowings	446,935,000	356,796,000	24,897,000
Line of Credit repayments	(449,976,000)	(353,755,000)	(24,897,000)
Senior Unsecured Notes
Cash flows provided by (used in) financing activities:
Proceeds from issuance of Senior Unsecured Notes, net of premiums	$ 85,000,000	$ 0	$ 500,000,000