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PENSION PLANS (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 28, 2019
Jun. 29, 2018
Jun. 28, 2019
Jun. 29, 2018
Retirement Benefits [Abstract]        
Pension plan contributions $ 44 $ 47 $ 134 $ 5,140
Components of net periodic benefit cost:        
Service cost 0 0 0 0
Interest on projected benefit obligation 298 272 827 794
Less estimated return on plan assets 259 (25) 641 572
Amortization of unrecognized losses (31) 50 246 415
Net periodic benefit cost $ 8 $ 347 $ 432 $ 637