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Pension and Other Postretirement Benefits
 9 Months Ended
Sep. 28, 2024
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
Employees of VPG participate in various defined benefit pension and other postretirement benefit ("OPEB") plans. The following table sets forth the components of the net periodic benefit cost for the Company's defined benefit pension and OPEB plans (in thousands):
Fiscal quarter ended 
 
September 28, 2024		Fiscal quarter ended 
 
September 30, 2023
Pension
Plans		OPEB
Plans		Pension
Plans		OPEB
Plans
Net service cost$66 $4 $67 $4 
Interest cost191 27 193 28 
Expected return on plan assets(211)— (216)— 
Amortization of actuarial losses (gains)4 (3)7 (6)
Net periodic benefit cost$50 $28 $51 $26 
Nine Fiscal Months Ended 
 
September 28, 2024		Nine Fiscal Months Ended 
 
September 30, 2023
Pension
Plans		OPEB
Plans		Pension
Plans		OPEB
Plans
Net service cost$199 $12 $204 $12 
Interest cost$572 $81 $575 $84 
Expected return on plan assets$(630)$— $(642)$— 
Amortization of actuarial losses (gains)$13 $(9)$22 $(18)
Net periodic benefit cost$154 $84 $159 $78