v3.26.1
Long-Lived Assets - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 05, 2026
USD ($)
Jun. 28, 2026
USD ($)
Jun. 29, 2025
USD ($)
Jun. 28, 2026
USD ($)
Jun. 29, 2025
USD ($)
Dec. 31, 2025
USD ($)
May 01, 2025
a
Property, Plant, and Equipment [Line Items]              
Estimated increase in depreciation expense           $ 19,000  
Loss on disposal group   $ (9,867) $ 0 $ (37,838) $ 0    
Marketed For Redevelopment | Six Flags American And Hurricane Harbor              
Property, Plant, and Equipment [Line Items]              
Area of land (in acres) | a             500
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Seven Parks              
Property, Plant, and Equipment [Line Items]              
Proceeds from divestiture of businesses $ 331,400            
Working capital adjustments $ 32,000            
Disposal group, including discontinued operation, ownership percentage in disposed asset 100.00%            
Loss on disposal group       37,800      
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Seven Parks | Secondary Guarantor For Lease              
Property, Plant, and Equipment [Line Items]              
Fair value of lease agreement guarantee   $ 13,400   $ 13,400