Goodwill And Intangible Assets (Components Of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets
Weighted- Average Life (years)	12 years
Gross Carrying Amount	$ 266,811	$ 263,639
Accumulated Amortization	$ (197,935)	(192,002)
Customer-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	11 years
Gross Carrying Amount	$ 132,602	133,269
Accumulated Amortization	$ (95,198)	(93,648)
Technology-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	9 years
Gross Carrying Amount	$ 71,559	69,242
Accumulated Amortization	$ (58,499)	(56,106)
Program-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	23 years
Gross Carrying Amount	$ 38,333	37,465
Accumulated Amortization	$ (23,039)	(21,672)
Marketing-related
Finite-Lived Intangible Assets
Weighted- Average Life (years)	8 years
Gross Carrying Amount	$ 22,516	21,890
Accumulated Amortization	$ (19,587)	(18,995)
Other Intangible Assets
Finite-Lived Intangible Assets
Weighted- Average Life (years)	10 years
Gross Carrying Amount	$ 1,801	1,773
Accumulated Amortization	$ (1,612)	$ (1,581)