Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands		Mar. 26, 2022	Sep. 25, 2021
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross		$ 560,934	$ 560,511
Accumulated amortization		(524,966)	(521,248)
Other intangible assets, net		35,968	39,263
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	[1]	519,777	519,604
Accumulated amortization		(489,622)	(486,395)
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	[1]	39,190	38,940
Accumulated amortization		(33,675)	(33,229)
Other [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross		1,967	1,967
Accumulated amortization		$ (1,669)	$ (1,624)

[1] Reflects the impact from acquisitions (See Note 4).