v3.25.4
PENSION, POSTRETIREMENT AND POSTEMPLOYMENT DEFINED BENEFIT PLANS - Net Periodic Cost (Benefit) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 28, 2025
Dec. 29, 2024
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost for benefits earned during the period $ 1 $ 1
Interest cost on projected benefit obligation 1,977 2,034
Expected return on plan assets (2,467) (2,319)
Amortization of prior service benefit 212 212
Net periodic pension benefit (277) (72)
Postretirement Medical Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost for benefits earned during the period 0 1
Interest cost on projected benefit obligation 83 108
Expected return on plan assets (391) (410)
Amortization of net (gain) loss (245) (292)
Amortization of prior service benefit (71) (71)
Net periodic pension benefit $ (624) $ (664)