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Retirement Benefits (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Apr. 01, 2022
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 1,464 $ 2,170
Interest cost 3,777 2,738
Expected return on assets (3,975) (4,802)
Amortization and other 440 1,076
Net periodic benefit cost 1,706 1,182
Postretirement Medical    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 100 175
Interest cost 210 225
Amortization 90 175
Net periodic benefit cost $ 400 $ 575