ORGANIZATION AND BASIS OF PRESENTATION - Organization (Details)	1 Months Ended	3 Months Ended
	Sep. 30, 2018 seat	Dec. 31, 2019 a
Entity Information [Line Items]
Number of seats | seat	5,000
Business acquisition property operations term (in years)		21 years
Mohegan Sun
Entity Information [Line Items]
Size of gaming and entertainment complex (in acres)		196
Mohegan Sun Pocono
Entity Information [Line Items]
Size of gaming and entertainment complex (in acres)		400
Salishan-Mohegan and Cowlitz Project
Entity Information [Line Items]
Ownership percentage		100.00%
Inspire Integrated Resort and MGA Korea
Entity Information [Line Items]
Ownership percentage		100.00%