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Employee Benefit Plans (Tables)
 6 Months Ended
May 30, 2021
Retirement Benefits [Abstract]  
Schedule of defined benefit plans disclosures
The following table summarizes the total net periodic benefit cost for the Company's defined pension plans and postretirement benefit plans:
 Three Months EndedSix Months Ended
 May 30,
2021		May 24,
2020		May 30,
2021		May 24,
2020
 (Dollars in thousands)
Net periodic benefit (income) cost:
Pension benefits$(621)$1,652 $(1,237)$3,356 
Postretirement benefits331 510 663 1,019 
Net periodic benefit (income) cost$(290)$2,162 $(574)$4,375