v3.25.2
Pension Benefits
 6 Months Ended
Jun. 29, 2025
Retirement Benefits [Abstract]  
Pension Benefits Pension Benefits:
Substantially concurrently with the closing and in connection with the Mergers, the Combined Company assumed the obligations of the Former Six Flags pension plan. Former Six Flags froze its pension plan effective March 31, 2006, and effective February 16, 2009, the remaining participants in the pension plan no longer earned future benefits. The following summarizes pension costs and the weighted-average assumptions used to determine net cost for the three and six months ended June 29, 2025. The components of net periodic (benefit) expense were included in "Other (income) expense, net" in the unaudited condensed consolidated statements of operations and comprehensive income (loss). Neither Former Six Flags nor the Combined Company made any pension contributions during the six month periods ended June 29, 2025 and June 30, 2024.
 Three months endedSix months ended
(In thousands)June 29, 2025June 29, 2025
Interest cost$1,970 $3,939 
Expected return on plan assets(2,236)(4,471)
Amortization of net actuarial loss— — 
Administrative fees213 425 
Total net periodic (benefit) expense$(53)$(107)
Discount rate5.40 %5.40 %
Rate of compensation increaseN/AN/A
Expected return on plan assets5.75 %5.75 %