CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows provided by (used in) operating activities:
Net income	$ 90,667,000	$ 56,654,000
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	55,969,000	58,703,000
Relinquishment liability reassessment	0	(243,000)
Accretion of discount to the relinquishment liability	0	227,000
Cash paid for accretion of discount to the relinquishment liability	0	(778,000)
Loss on early extinguishment of debt	207,000	0
Payments of discounts	(2,717,000)	0
Amortization of debt issuance costs, premiums and discounts	7,252,000	5,757,000
Provision (recovery) for losses on receivables	(5,075,000)	3,399,000
Share based compensation	6,147,000	0
Impairment of Project Horizon	0	2,502,000
Loss on disposition of assets	341,000	845,000
Loss from unconsolidated affiliates	1,338,000	1,302,000
Changes in operating assets and liabilities:
Increase in receivables	(4,705,000)	(282,000)
Increase in inventories	(1,177,000)	(972,000)
Increase in prepaid and other assets	(11,380,000)	(6,317,000)
Decrease in trade payables	(1,676,000)	(9,803,000)
Increase in accrued interest	10,466,000	20,059,000
Increase in other liabilities	8,148,000	13,430,000
Net cash flows provided by operating activities	153,805,000	144,483,000
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including decreases in construction payables of $10,031 and $3,302, respectively	(37,726,000)	(12,081,000)
Issuance of third-party loans and advances	(4,229,000)	(2,201,000)
Payments received on third-party loans and advances	13,524,000	117,000
Increase in restricted cash, net	(47,422,000)	(782,000)
Proceeds from asset sales	161,000	1,577,000
Investments in unconsolidated affiliates	(100,000)	0
Investments in the New England Black Wolves	0	(500,000)
Net cash flows used in investing activities	(75,792,000)	(13,870,000)
Cash flows provided by (used in) financing activities:
Borrowings from Mohegan Tribe	22,500,000	0
Repayments to Mohegan Tribe	(25,500,000)	(875,000)
Repayments of other long-term debt	(624,000)	(9,900,000)
Principal portion of relinquishment liability payments	0	(24,400,000)
Distributions to Mohegan Tribe	(34,450,000)	(32,500,000)
Payments of financing fees	(5,081,000)	0
Payments on capital lease obligations	(615,000)	(726,000)
Payments to acquire non-controlling interests	(804,000)	0
Non-controlling interest contributions	47,568,000	0
Net cash flows provided by (used in) financing activities	44,594,000	(109,561,000)
Net increase in cash and cash equivalents	122,607,000	21,052,000
Effect of exchange rate on cash and cash equivalents	308,000	0
Cash and cash equivalents at beginning of period	65,754,000	49,108,000
Cash and cash equivalents at end of period	188,669,000	70,160,000
Supplemental disclosures:
Cash paid during the period for interest	84,588,000	80,600,000
Credit Facility | Senior Secured Credit Facility - Revolving, due June 2018
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	521,000,000	299,000,000
Credit facility/line of credit repayments	(523,000,000)	(328,000,000)
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	(10,892,000)	(5,469,000)
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	(28,430,000)	(3,650,000)
Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	387,781,000	332,124,000
Credit facility/line of credit repayments	(387,781,000)	(335,165,000)
Repayments to Mohegan Tribe		(875,000)
Credit Facility | Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	25,000,000	0
Credit facility/line of credit repayments	(1,562,000)	0
Credit Facility | Prior Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	(40,516,000)	0
Credit Facility | Senior Secured Credit Facility, Tern Loan A and B
Supplemental disclosures:
Non-cash Senior Secured Credit Facility repayments - Term Loan A and Term Loan B	5,179,000	4,169,000
Senior Unsecured Notes
Cash flows provided by (used in) financing activities:
Proceeds from issuance of Senior Unsecured Notes	100,000,000	0
Promissory Notes | 2012 Mohegan Tribe Promissory Note
Supplemental disclosures:
Non-cash Senior Secured Credit Facility repayments - Term Loan A and Term Loan B	$ 6,000,000	$ 0