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Postretirement Benefits
9 Months Ended
Jun. 26, 2020
Retirement Benefits [Abstract]  
Postretirement Benefits
5. POSTRETIREMENT BENEFITS

        The Company provides pension benefits through a number of noncontributory and contributory defined benefit retirement plans covering eligible U.S. employees. As of September 30, 2017, all defined pension benefit plans were frozen, whereby participants no longer accrue credited service. The net periodic benefit credit was as follows: 
Three months endedNine months ended
(in thousands)NoteJune 26, 2020June 28, 2019June 26, 2020June 28, 2019
Interest cost$935  $1,166  $2,805  $3,498  
Expected return on plan assets(1,583) (1,593) (4,749) (4,779) 
Amortization of actuarial loss222  25  666  75  
Net periodic benefit credit7$(426) $(402) $(1,278) $(1,206)