v3.26.3
Related Party Transactions - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Jun. 30, 2025
Sep. 30, 2026
Jun. 30, 2026
Related Party Transaction [Line Items]      
Aggregate voting power held by related party (as percent)   70.70%  
MSG Networks      
Related Party Transaction [Line Items]      
Penny warrants issued, exercisable, percentage of equity interests (as a percent) 19.90%    
Warrants assigned, exercisable, percentage of equity interests (as a percent)   6.50%  
Arena License Agreements | MSG Entertainment      
Related Party Transaction [Line Items]      
License agreement term (in years)   35 years  
Related party transaction, percentage of net profits from sales and catering services (as percent)   50.00%  
Sponsorship Sales and Service Representation Agreements | MSG Entertainment      
Related Party Transaction [Line Items]      
License agreement term (in years)   10 years  
MSG Rangers Lease Agreement | MSG Rangers      
Related Party Transaction [Line Items]      
Lease term   10 years  
Lease annual fixed rent percentage   103.00%  
MSG Rangers Lease Agreement | MSG Rangers | First Contract Year      
Related Party Transaction [Line Items]      
Annual fixed rent   $ 2,000  
Class B Common Stock      
Related Party Transaction [Line Items]      
Percentage of common stock owned by related party (as percent)   100.00%  
Common stock, par value (in USD per share)   $ 0.01 $ 0.01
Class A Common Stock      
Related Party Transaction [Line Items]      
Percentage of common stock owned by related party (as percent)   3.10%  
Common stock, par value (in USD per share)   $ 0.01 $ 0.01