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Employee Benefit Plans (Tables)
 6 Months Ended
Jul. 04, 2021
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Costs
The following tables provide the components of net periodic benefit cost for the three and six months ended July 4, 2021 and July 5, 2020:
Three Months EndedSix Months Ended
Defined Benefit Retirement Plans (Europe)
July 4, 2021July 5, 2020July 4, 2021July 5, 2020
(in thousands)
Interest cost$579 $870 $1,151 $1,761 
Expected return on assets(860)(1,038)(1,709)(2,102)
Amortization of prior service cost29 26 58 52 
Amortization of net actuarial losses409 320 813 646 
Net periodic benefit cost$157 $178 $313 $357 
Three Months EndedSix Months Ended
Salary Continuation PlanJuly 4, 2021July 5, 2020July 4, 2021July 5, 2020
(in thousands)
Interest cost$177 $235 $353 $469 
Amortization of net actuarial losses186 139 372 279 
Net periodic benefit cost$363 $374 $725 $748 
Three Months EndedSix Months Ended
nora Defined Benefit Plan
July 4, 2021July 5, 2020July 4, 2021July 5, 2020
(in thousands)
Service cost$277 $259 $554 $517 
Interest cost104 110 207 221 
Amortization of net actuarial losses92 110 184 110 
Net periodic benefit cost$473 $479 $945 $848