v3.26.1
FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Jun. 26, 2026
Sep. 30, 2025
Level 1    
Assets    
Cash equivalents $ 240,937 $ 422,292
HDPE derivative asset 0 0
Level 2    
Assets    
Cash equivalents 0 0
HDPE derivative asset 0 0
Level 3    
Assets    
Cash equivalents 0  
HDPE derivative asset $ 9,400 $ 0