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REVENUE AND CONTRACT BALANCES - contract assets (Details) - USD ($)
12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]    
Contract assets, beginning of period $ 26,317,000 $ 0
Additions 4,230,000 51,774,000
Transferred to accounts receivable or collected (20,366,000) (25,457,000)
Contract assets, end of period $ 10,181,000 $ 26,317,000