Goodwill And Intangible Assets (Components Of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 29, 2025	Sep. 28, 2024
Finite-Lived Intangible Assets
Weighted- Average Life (years)	12 years
Gross Carrying Amount	$ 258,655	$ 261,780
Accumulated Amortization	$ (200,740)	(198,301)
Customer-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	11 years
Gross Carrying Amount	$ 128,744	130,092
Accumulated Amortization	$ (97,431)	(96,307)
Technology-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	9 years
Gross Carrying Amount	$ 67,717	68,275
Accumulated Amortization	$ (57,213)	(56,236)
Program-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	23 years
Gross Carrying Amount	$ 38,990	39,865
Accumulated Amortization	$ (25,134)	(24,887)
Marketing-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	8 years
Gross Carrying Amount	$ 21,842	22,141
Accumulated Amortization	$ (19,617)	(19,486)
Other Intangible Assets
Finite-Lived Intangible Assets
Weighted- Average Life (years)	3 years
Gross Carrying Amount	$ 1,362	1,407
Accumulated Amortization	$ (1,345)	$ (1,385)