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MOHEGAN GAMING ADVISORS, LLC (PROJECT INSPIRE) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
May 28, 2018
Feb. 28, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Schedule of Long-term Development Projects [Line Items]            
Non-controlling interest portion of accumulated other comprehensive income     $ (1,657) $ (2,866) $ 7,369 $ (4,475)
Mohegan Gaming Advisors | Project Inspire            
Schedule of Long-term Development Projects [Line Items]            
Reduction in retained earnings due to redemption and repurchase of noncontrolling interest $ 10,000          
Non-controlling interest portion of accumulated other comprehensive income $ 7,700          
Inspire Integrated Resort | Mohegan Gaming Advisors | Project Inspire            
Schedule of Long-term Development Projects [Line Items]            
Development and management fees payable   $ 10,000        
Period of development and management fees payable   13 years        
Membership or limited partnership interest percentage 49.81%          
Payments to acquire limited partnership interest $ 107,000