LEASES (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Feb. 28, 2015 rooms	Mar. 31, 2015 a rooms	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Minimum future rental income
2016			$ 5,537
2017			4,867
2018			4,534
2019			4,387
2020			4,288
Thereafter			7,567
Total			31,180
Rental expense			8,800	$ 9,200	$ 11,400
Minimum future rental payment
2016			7,999
2017			8,340
2018			8,128
2019			8,183
2020			7,334
Thereafter			210,295
Total			$ 250,279
Mohegan Tribal Finance Authority
Related Party Transaction [Line Items]
Fourth Amendment, Amount of rooms to be developed (in room) | rooms	400	400
Fourth Amendment, Amount of acres released for use | a		1.2
Initial lease term		28 years 4 months