SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - Reserves for uncollectible accounts - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at Beginning of Year		$ 42,335	$ 38,636	$ 34,420
Charges to Costs and Expenses		3,526	5,878	6,146
Deductions from Reserves	[1]	18,477	2,179	1,930
Balances at End of Year		27,384	$ 42,335	$ 38,636
Salishan-Mohegan
Movement in Valuation Allowances and Reserves [Roll Forward]
Write-off of receivables		7,300
Wisconsin Tribal Gaming
Movement in Valuation Allowances and Reserves [Roll Forward]
Write-off of receivables		$ 9,800

[1] Deductions from reserves generally represent write-off of uncollectible accounts, net of recoveries of accounts previously written-off. In fiscal 2016, deductions from reserves primarily include $7.3 million related to the Salishan-Mohegan receivables and $9.8 million related to the WTG receivables.