CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows provided by (used in) operating activities:
Net income (loss)	$ (20,845)	$ 65,107
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	36,302	37,797
Loss on modification and early extinguishment of debt, net	65,218	207
Amortization of debt issuance costs, premiums and discounts	3,521	4,679
Provision (recovery) for losses on receivables	1,463	(5,974)
Share-based compensation	7,569	6,147
(Gain) loss on disposition of assets	(91)	329
Loss from unconsolidated affiliates	2,845	844
Changes in operating assets and liabilities:
(Increase) decrease in receivables	8,639	(5,084)
(Increase) decrease in inventories	374	(312)
Increase in prepaid and other assets	(10,166)	(17,452)
Decrease in trade payables	(2,462)	(6,673)
Increase (decrease) in accrued interest	12,902	(6,394)
Increase in other liabilities	7,966	9,986
Net cash flows provided by operating activities	113,235	83,207
Cash flows provided by (used in) investing activities:
Purchases of property and equipment, including decreases in construction payables of $2,604 and $8,506, respectively	(31,929)	(28,645)
Issuance of third-party loans and advances	(1,074)	(3,348)
Payments received on third-party loans and advances	87	13,482
(Increase) decrease in restricted cash, net	6,518	(51,404)
Proceeds from asset sales	146	146
Investments in unconsolidated affiliates	(600)	(500)
Investments in the New England Black Wolves	0	(250)
Net cash flows used in investing activities	(26,852)	(70,519)
Cash flows provided by (used in) financing activities:
Borrowings from Mohegan Tribe	0	22,500
Repayments to Mohegan Tribe	(12,920)	(10,000)
Repayments of other long-term debt	(785,327)	(255)
Payments on capital lease obligations	(1,521)	(408)
Distributions to Mohegan Tribe	(24,000)	(21,200)
Payments of tender offer and repurchase costs	(50,308)	0
Payments of financing fees	(22,106)	(5,047)
Non-controlling interest contributions	0	47,568
Net cash flows provided by (used in) financing activities	(89,264)	103,268
Net increase (decrease) in cash and cash equivalents	(2,881)	115,956
Effect of exchange rate on cash and cash equivalents	(16)	4,202
Cash and cash equivalents at beginning of period	83,743	65,754
Cash and cash equivalents at end of period	80,846	185,912
Supplemental disclosures:
Cash paid during the period for interest	42,220	70,070
Non-cash payments received - Cowlitz Tribal Gaming Authority	0	6,000
Credit Facility | Prior Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	35,000	376,000
Credit facility/line of credit repayments	(48,000)	(355,000)
Credit Facility | Prior Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	(99,986)	(7,825)
Credit Facility | Prior Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	(778,175)	(26,768)
Credit Facility | Senior Secured Credit Facility - Revolving
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	301,000	0
Credit facility/line of credit repayments	(284,000)	0
Credit Facility | Senior Secured Credit Facility - Term Loan A
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	441,965	0
Credit facility/line of credit repayments	(16,688)	0
Credit Facility | Senior Secured Credit Facility - Term Loan B
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	777,150	0
Credit facility/line of credit repayments	(1,963)	0
Credit Facility | Prior Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	9,735	251,577
Credit facility/line of credit repayments	(9,735)	(251,577)
Credit Facility | Line of Credit
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	296,550	0
Credit facility/line of credit repayments	(290,634)	0
Credit Facility | Prior Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit repayments	0	(40,516)
Credit Facility | Downs Lodging Credit Facility
Cash flows provided by (used in) financing activities:
Credit facility/line of credit borrowings	0	25,000
Credit facility/line of credit repayments	(21,656)	(781)
Credit Facility | Senior Secured Credit Facility, Term Loan A and B
Supplemental disclosures:
Non-cash repayments	0	5,178
Senior Unsecured Notes
Cash flows provided by (used in) financing activities:
Proceeds from issuance of Senior Unsecured Notes, net of discount	496,355	100,000
Promissory Notes | 2012 Mohegan Tribe Promissory Note
Supplemental disclosures:
Non-cash repayments	$ 0	$ 6,000