Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes in the 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	2,282		24,719		27,001
Balance at June 30, 2024	$	747,089	$	1,245,021	$	1,992,110

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):

	Period Ended
	June 30, 2024							October 1, 2023
	Weighted- Average Remaining Life (in Years)	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Client relations	8.4	$	190,329	$	(50,980)	$	139,349	$	169,217	$	(36,072)	$	133,145
Backlog	0.6	72,579		(65,050)		7,529		63,825		(47,802)		16,023
Trade names	1.7	38,773		(21,192)		17,581		37,411		(12,643)		24,768
Total		$	301,681	$	(137,222)	$	164,459	$	270,453	$	(96,517)	$	173,936

Estimated amortization expense for the remainder of the fiscal year and the succeeding years

Estimated amortization expense for the remainder of fiscal 2024 and succeeding years is as follows (in thousands):

	Amount
2024 (remaining)	$	11,322
2025	34,712
2026	23,334
2027	16,830
2028	16,320
Beyond	61,941
Total	$	164,459