Goodwill and Intangible Assets (Tables)

12 Months Ended

Sep. 28, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes in carrying value of goodwill

The following table summarizes the changes in the carrying value of goodwill by reportable segment (in thousands):

	GSG		CIG		Total
Balance at October 1, 2023	$	659,942	$	1,220,302	$	1,880,244
Acquisition activity	84,865		—		84,865
Translation and other adjustments	6,010		75,450		81,460
Balance at September 29, 2024	750,817		1,295,752		2,046,569
Acquisition activity	—		124,292		124,292
Goodwill impairment	(92,416)		—		(92,416)
Classified as held-for-sale	—		(18,533)		(18,533)
Translation and other adjustments	110		(10,148)		(10,038)
Balance at September 28, 2025	$	658,511	$	1,391,363	$	2,049,874

Summary of acquired identifiable intangible assets with finite useful lives

The following table presents the gross amount and accumulated amortization of our acquired identifiable intangible assets with finite useful lives included in "Intangible assets, net" on the consolidated balance sheets ($ in thousands):

	Fiscal Year Ended
	September 28, 2025							September 29, 2024
	Weighted- Average Remaining Life (in years)	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Client relations	7.3	$	169,807	$	(56,241)	$	113,566	$	198,726	$	(57,975)	$	140,751
Backlog	1.0	43,919		(40,397)		3,522		75,194		(71,101)		4,093
Trade names	0.5	34,805		(30,733)		4,072		40,926		(25,185)		15,741
Total		$	248,531	$	(127,371)	$	121,160	$	314,846	$	(154,261)	$	160,585

Summary of estimated amortization expense for the succeeding five years and beyond

Estimated amortization expense for the succeeding five fiscal years and beyond is as follows (in thousands):

	Amount
2026	$	26,546
2027	17,398
2028	16,636
2029	15,722
2030	11,571
Beyond	33,287
Total	$	121,160