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PENSION PLANS (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 27, 2019 | Dec. 28, 2018
Retirement Benefits [Abstract] |  |
Pension plan contributions | $ 44 | $ 45
Components of net periodic benefit cost: |  |
Service cost | 0 | 0
Interest on projected benefit obligation | 276 | 265
Less estimated return on plan assets | 214 | 191
Amortization of unrecognized losses | 82 | 138
Net periodic benefit cost | $ 144 | $ 212

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