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Revenue from Contracts with Customers (Contract Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Oct. 01, 2022
Revenue from Contract with Customer [Abstract]    
Unbilled receivables $ 706,601 $ 614,760
Contract advances and progress billings 377,977 296,899
Net contract assets $ 328,624 $ 317,861