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Stockholders' Equity And Stock-Based Compensation (Schedule of Stock-Based Compensation By Classification) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Apr. 01, 2022 | Mar. 31, 2023 | Apr. 01, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 29,827 | $ 27,699 | $ 61,067 | $ 60,355
Estimated benefit from income taxes | (4,497) | (4,412) | (9,199) | (9,531)
Total stock-based compensation, net of tax | 25,330 | 23,287 | 51,868 | 50,824
Cost of products and services |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 431 | 402 | 934 | 992
Research and development |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 9,472 | 9,155 | 20,148 | 19,257
Sales and marketing |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 10,276 | 9,791 | 21,003 | 22,039
General and administrative |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 9,648 | $ 8,351 | $ 18,982 | $ 18,067

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