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)

v3.19.2
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. 29, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 29, 2019
USD ($)
retirement_plan
Jun. 30, 2018
USD ($)
Retirement Benefits [Abstract]        
Number of non-qualified supplemental retirement defined benefit plans | retirement_plan     2  
SERP        
Defined Benefit Plan Disclosure        
Service Cost $ 46 $ 50 $ 91 $ 100
Interest Cost 229 225 458 450
Amortization of Prior Service Cost 96 97 193 194
Amortization of Net Actuarial Losses 75 157 150 314
Net Periodic Cost 446 529 892 1,058
SERP | SERP Medical        
Defined Benefit Plan Disclosure        
Service Cost 4 4 7 8
Interest Cost 11 12 23 23
Amortization of Prior Service Cost 4 4 8 8
Amortization of Net Actuarial Losses 11 15 21 29
Net Periodic Cost $ 30 $ 35 $ 59 $ 68