v3.26.1
Mergers - Schedule of Purchase Price Allocation of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 29, 2025
Jun. 29, 2025
Jun. 28, 2026
Dec. 31, 2025
Dec. 31, 2024
Jul. 01, 2024
Adjusted Allocation            
Goodwill $ 3,399,090 $ 3,399,090 $ 2,078,352 $ 2,071,680 $ 3,296,523  
Former Six Flags            
Adjusted Allocation            
Receivables 90,792 90,792       $ 84,853
Inventories 40,137 40,137       40,580
Other current assets 44,889 44,889       53,000
Property and equipment, net 2,710,053 2,710,053       3,356,409
Other intangibles, net 850,000 850,000       850,000
Right-of-use assets 169,902 169,902       167,074
Other assets 14,688 14,688       14,688
Total assets acquired 3,920,461 3,920,461       4,566,604
Current maturities of long-term debt 56,583 56,583       56,867
Accounts payable 73,798 73,798       73,445
Deferred revenue 208,943 208,943       206,398
Accrued interest 23,448 23,448       23,448
Accrued taxes 9,713 9,713       15,465
Accrued salaries, wages and benefits 19,682 19,682       19,216
Self-insurance reserves 83,734 83,734       75,670
Other accrued liabilities 61,284 61,284       63,487
Deferred tax liabilities 692,573 692,573       756,211
Lease liabilities 189,439 189,439       184,343
Other liabilities 24,497 24,497       24,497
Long-term debt 2,373,322 2,373,322       2,373,322
Total liabilities assumed 3,817,016 3,817,016       3,872,369
Total net assets acquired 103,445 103,445       694,235
Goodwill 3,143,881 3,143,881       2,553,091
Fair value of net assets acquired 3,247,326 3,247,326       $ 3,247,326
Measurement Period Adjustments            
Receivables   5,939        
Inventories   (443)        
Other current assets   (8,111)        
Property and equipment, net   (646,356)        
Other intangibles, net   0        
Right-of-use assets   2,828        
Other assets   0        
Total assets acquired   (646,143)        
Current maturities of long-term debt   (284)        
Accounts payable   353        
Deferred revenue   2,545        
Accrued interest   0        
Accrued taxes   (5,752)        
Accrued salaries, wages and benefits   466        
Self-insurance reserves   8,064        
Other accrued liabilities   (2,203)        
Deferred tax liabilities   (63,638)        
Lease liabilities   5,096        
Other liabilities   0        
Long-term debt   0        
Total liabilities assumed   (55,353)        
Total net assets acquired   (590,790)        
Goodwill $ 590,800 590,790        
Fair value of net assets acquired   $ 0