XML 75 R37.htm IDEA: XBRL DOCUMENT v3.21.2
Net Periodic Pension Benefit (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Retirement Benefits [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost on projected benefit obligation 505 723 1,010 1,446
Expected return on plan assets (1,140) (1,210) (2,280) (2,420)
Amortization of unrecognized gain 321 263 642 526
Net periodic pension benefit $ (314) $ (224) $ (628) $ (448)