Quarterly report pursuant to Section 13 or 15(d)

Supplemental Retirement Plan and Related Post Retirement Benefits - Summary of the Components of Net Periodic Cost (Details)

v3.20.2
Supplemental Retirement Plan and Related Post Retirement Benefits - Summary of the Components of Net Periodic Cost (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 27, 2020
USD ($)
Jun. 29, 2019
USD ($)
Jun. 27, 2020
USD ($)
retirement_plan
Jun. 29, 2019
USD ($)
Retirement Benefits [Abstract]        
Number of non-qualified supplemental retirement defined benefit plans | retirement_plan     2  
SERP        
Defined Benefit Plan Disclosure        
Service Cost $ 56 $ 46 $ 111 $ 91
Interest Cost 209 229 418 458
Amortization of Prior Service Cost 96 96 193 193
Amortization of Net Actuarial Losses 162 75 324 150
Net Periodic Cost 523 446 1,046 892
SERP | SERP Medical        
Defined Benefit Plan Disclosure        
Service Cost 3 4 7 7
Interest Cost 8 11 17 23
Amortization of Prior Service Cost 4 4 8 8
Amortization of Net Actuarial Losses 11 11 20 21
Net Periodic Cost $ 26 $ 30 $ 52 $ 59