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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
May 24, 2020 | May 26, 2019 | May 24, 2020 | May 26, 2019
Net periodic benefit cost: |  |  |  |
Net periodic benefit cost | $ 2,162 | $ 4,909 | $ 4,375 | $ 9,779
Total pension plan contributions | 4,000 |  | 14,500 |
Pension benefits |  |  |  |
Net periodic benefit cost: |  |  |  |
Net periodic benefit cost | 1,652 | 4,016 | 3,356 | 7,993
Postretirement benefits |  |  |  |
Net periodic benefit cost: |  |  |  |
Net periodic benefit cost | $ 510 | $ 893 | $ 1,019 | $ 1,786

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