v3.26.1
Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost/(Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Retirement Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 1,168 $ 1,366 $ 2,425 $ 2,562
Interest cost 5,169 5,448 10,222 10,581
Expected return on plan assets (3,752) (3,420) (7,398) (6,625)
Amortization of prior service cost 190 209 374 397
Amortization of net actuarial loss (gain) 887 899 1,777 1,887
Effect of curtailment loss 60 0 60 0
Effect of settlement loss 337 0 337 0
Net periodic benefit (income)/cost 4,059 4,502 7,797 8,802
Retiree Health and Life Insurance Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost   27 0 66
Service cost (29)      
Interest cost 192 216 416 453
Expected return on plan assets (151) (104) (295) (204)
Amortization of prior service cost 74 91 164 185
Amortization of net actuarial loss (gain) (86) (357) (241) (571)
Net periodic benefit (income)/cost $ 0 $ (127) $ 44 $ (71)