Goodwill And Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Changes In The Carrying Amount Of Goodwill

Table 8.1: Changes in Goodwill by Segment
	U.S. Federal Services		U.S. Services		Outside the U.S.		Total
	(in thousands)
Balance as of September 30, 2023	$	1,559,863	$	164,472	$	54,880	$	1,779,215
Divestitures	—		—		(364)		(364)
Foreign currency translation	—		—		4,020		4,020
Balance as of September 30, 2024	1,559,863		164,472		58,536		1,782,871
Foreign currency translation	—		—		(776)		(776)
Balance as of September 30, 2025	$	1,559,863	$	164,472	$	57,760	$	1,782,095

Schedule of Finite-Lived Intangible Assets

Table 8.2: Details of Intangible Assets, Net
	As of September 30,
	2025						2024
	Cost		Accumulated Amortization		Intangible Assets, Net		Cost		Accumulated Amortization		Intangible Assets, Net
	(in thousands)
Customer contracts and relationships	$	869,638	$	382,107	$	487,531	$	870,810	$	309,067	$	561,743
VES Provider network	57,000		20,583		36,417		57,000		15,833		41,167
Technology-based intangible assets	31,502		31,502		—		31,586		20,786		10,800
Assembled workforce	17,851		3,533		14,318		18,185		1,326		16,859
Trademarks and trade names	4,460		4,460		—		4,474		4,474		—
Total	$	980,451	$	442,185	$	538,266	$	982,055	$	351,486	$	630,569

Table 8.3: Details of Weighted Average Remaining Lives
	As of September 30, 2025
Customer contracts and relationships	7.0 years
VES Provider network	7.7 years
Assembled workforce	6.4 years
Weighted Average Remaining Life	7.1 years

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Table 8.4: Details of Estimated Future Amortization Expense of Intangible Assets, Net
	As of September 30, 2025
	(in thousands)
Year ended September 30, 2026	$	81,220
Year ended September 30, 2027	81,220
Year ended September 30, 2028	81,220
Year ended September 30, 2029	71,259
Year ended September 30, 2030	67,586
Thereafter	155,761
Total	$	538,266