SUBSEQUENT EVENTS (Details) (Hotel Expansion Project at Mohegan Sun at Pocono Downs [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 31, 2012 rooms sqft
Subsequent Event [Line Items]
Cost of expansion project	$ 50
Number of hotel rooms planned in expansion	238
Size of convention center planned in expansion	20,000
Downs Lodging, LLC [Member]
Subsequent Event [Line Items]
Cost of expansion project	45
Mohegan Tribal Gaming Authority [Member]
Subsequent Event [Line Items]
Cost of expansion project	$ 5