Goodwill and Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Acquired Intangible Assets

Goodwill and acquired intangible assets consisted of the following:

(in thousands)	March 31, 2025						September 30, 2024
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill					$	3,444,104					$	3,461,891
Intangible assets with finite lives:
Purchased software	$	631,889	$	451,196	$	180,693	$	634,439	$	436,471	$	197,968
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		1,135,655		475,455		660,200		1,141,086		457,718		683,368
Trademarks and trade names		37,780		22,879		14,901		37,961		21,821		16,140
Other		3,900		3,900		—		3,941		3,941		—
Total intangible assets with finite lives	$	1,832,101	$	976,307	$	855,794	$	1,840,304	$	942,828	$	897,476
Total goodwill and acquired intangible assets					$	4,299,898					$	4,359,367

Schedule of Changes in Goodwill by Reportable Segments

Changes in Goodwill were as follows:

(in thousands)
Balance, October 1, 2024	$	3,461,891
Foreign currency translation adjustment		(17,787	)
Balance, March 31, 2025	$	3,444,104

Schedule of Aggregate Amortization Expense for Intangible Assets with Finite Lives

The aggregate amortization expense for intangible assets with finite lives is classified in our Consolidated Statements of Operations as follows:

(in thousands)	Three months ended				Six months ended
	March 31, 2025		March 31, 2024		March 31, 2025		March 31, 2024
Amortization of acquired intangible assets	$	11,380	$	10,424	$	22,820	$	20,787
Cost of revenue		8,131		9,584		16,431		19,150
Total amortization expense	$	19,511	$	20,008	$	39,251	$	39,937