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Business Segments (Tables)

12 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Schedule of Financial Information for each of the Company's Business Segments

Table 3.1: Results of Operation by Business Segment
			For the Year Ended September 30, 2025
(dollars in thousands)			U.S. Federal Services						% (1 )						U.S. Services						% (1 )						Outside the U.S.						% (1 )						Total
Revenue			$	3,067,691											$	1,763,691											$	599,894											$	5,431,276
Cost of revenue			2,256,928						73.6		%				1,352,709						76.7		%				488,196						81.4		%				4,097,833
Gross profit			810,763						26.4		%				410,982						23.3		%				111,698						18.6		%				1,333,443
Other segment items (2)			341,608						11.1		%				239,718						13.6		%				89,307						14.9		%				670,633
Segment operating income			$	469,155					15.3		%				$	171,264					9.7		%				$	22,391					3.7		%				662,810
Divestiture-related charges (3)																																							(39,549)
Other (4)																																							(2,925)
Amortization of intangible assets																																							(92,047)
Operating income																																							$	528,289
Depreciation and amortization:			$	17,146					0.6		%				$	17,295					1.0		%				$	7,228					1.2		%				$	41,669
			For the Year Ended September 30, 2024
(dollars in thousands)			U.S. Federal Services						% (1 )						U.S. Services						% (1 )						Outside the U.S.						% (1 )						Total
Revenue			$	2,737,244											$	1,911,813											$	657,140											$	5,306,197
Cost of revenue			2,071,482						75.7		%				1,432,026						74.9		%				551,037						83.9		%				4,054,545
Gross profit			665,762						24.3		%				479,787						25.1		%				106,103						16.1		%				1,251,652
Other segment items (2)			332,140						12.1		%				232,805						12.2		%				98,398						15.0		%				663,343
Segment operating income			$	333,622					12.2		%				$	246,982					12.9		%				$	7,705					1.2		%				588,309
Divestiture-related charges (3)																																							(1,018)
Other (4)																																							(7,222)
Amortization of intangible assets																																							(91,570)
Operating income																																							$	488,499
Depreciation and amortization:			$	10,503					0.4		%				$	16,079					0.8		%				$	7,375					1.1		%				$	33,957
			For the Year Ended September 30, 2023
(dollars in thousands)			U.S. Federal Services						% (1 )						U.S. Services						% (1 )						Outside the U.S.						% (1 )						Total
Revenue			$	2,403,606											$	1,812,069											$	689,053											$	4,904,728
Cost of revenue			1,845,720						76.8		%				1,434,528						79.2		%				595,872						86.5		%				3,876,120
Gross profit			557,886						23.2		%				377,541						20.8		%				93,181						13.5		%				1,028,608
Other segment items (2)			308,197						12.8		%				194,991						10.8		%				102,311						14.8		%				605,499
Segment operating income/(loss)			$	249,689					10.4		%				$	182,550					10.1		%				$	(9,130)					(1.3)		%				423,109
Divestiture-related charges (3)																																							(3,751)
Other (4)																																							(29,973)
Amortization of intangible assets																																							(94,591)
Operating income																																							$	294,794
Depreciation and amortization:			$	18,336					0.8		%				$	22,674					1.3		%				$	13,715					2.0		%				$	54,725

(1)Percentage of respective segment revenue.

(2)Other segment items are principally selling, general, and administrative expenses allocated to segments.

(3)During fiscal years 2025, 2024 and 2023, we sold a number of businesses in our Outside the U.S. Segment. Refer to "Note 7. Acquisitions and Divestitures" for more details.

(4)Other includes credits and costs that are not allocated to a particular segment. For the fiscal years 2025, 2024 and 2023, these charges include $3.0 million, $2.9 million, and $29.3 million, respectively, related to the costs of a previously disclosed cybersecurity incident. Other charges include direct costs of acquisitions. These costs are excluded from measuring each segment's operating performance.

Schedule of Long-Lived Assets by Geography

Table 3.2: Long-Lived Assets by Geography
			As of September 30,
			2025						2024
			(in thousands)
United States			$	386,668					$	383,989
Outside the US			22,350						32,172
Total			$	409,018					$	416,161

X

- Definition

Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area.

+ References

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Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

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