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Employee Retirement Plans (Tables)
 9 Months Ended
Sep. 27, 2025
Employee Retirement Plans [Abstract]  
Schedule of Costs of Retirement Plans [Table Text Block]
The following table summarizes the company's net periodic pension benefit related to the AGA Group pension plans (in thousands):
Three Months EndedNine Months Ended
Sep 27, 2025Sep 28, 2024Sep 27, 2025Sep 28, 2024
Net Periodic Pension Benefit:  
Interest cost$12,141 $11,225 $35,875 $32,814 
Expected return on assets(14,567)(15,930)(43,043)(46,567)
Amortization of net loss16 14 46 40 
Amortization of prior service cost701 686 2,072 2,005 
 $(1,709)$(4,005)$(5,050)$(11,708)