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Composition Of Certain Financial Statement Captions (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands | Dec. 29, 2023 | Sep. 29, 2023
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Composition Of Certain Financial Statement Captions [Abstract] |  |
Trade accounts receivable | $ 111,027 | $ 137,820
Accounts receivable from patent administration program licensees | 189,629 | 134,108
Contract assets | 217,667 | 182,268
Accounts receivable and contract assets, gross | 518,323 | 454,196
Less: allowance for credit losses on accounts receivable and contract assets | (7,536) | (9,821)
Total accounts receivable and contract assets, net | $ 510,787 | $ 444,375

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