Composition Of Certain Financial Statement Captions (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands |
Sep. 27, 2024 |
Sep. 29, 2023 |
|---|---|---|
| Composition Of Certain Financial Statement Captions [Abstract] | ||
| Trade accounts receivable | $ 170,574 | $ 137,820 |
| Accounts receivable from patent administration program partners | 150,252 | 134,108 |
| Contract with Customer, Asset, after Allowance for Credit Loss, Current | 197,584 | 182,268 |
| Accounts receivable and contract assets, gross | 518,410 | 454,196 |
| Accounts Receivable And Contract With Customer, Asset, Allowance For Credit Loss, Current | (5,467) | (9,821) |
| Total accounts receivable and contract assets, net | $ 512,943 | $ 444,375 |