Business Segments (Tables)

9 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

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


Table 3.1: Results of Operations by Business Segment
			For the Three Months Ended																								For the Nine Months Ended
			June 30, 2025												June 30, 2024												June 30, 2025												June 30, 2024
			Amount						% (1)						Amount						% (1)						Amount						% (1)						Amount						% (1)
			(dollars in thousands)
Revenue:
U.S. Federal Services			$	761,174											$	683,347											$	2,319,756											$	2,062,127
U.S. Services			439,818												472,298												1,334,418												1,448,258
Outside the U.S.			147,408												159,284												458,687												479,942
Revenue			$	1,348,400											$	1,314,929											$	4,112,861											$	3,990,327
Gross profit:
U.S. Federal Services			$	226,134					29.7		%				$	186,075					27.2		%				$	601,507					25.9		%				$	506,074					24.5		%
U.S. Services			105,932						24.1		%				121,012						25.6		%				312,706						23.4		%				369,497						25.5		%
Outside the U.S.			27,447						18.6		%				25,227						15.8		%				85,678						18.7		%				74,386						15.5		%
Gross profit			$	359,513					26.7		%				$	332,314					25.3		%				$	999,891					24.3		%				$	949,957					23.8		%
Selling, general, and administrative expenses:
U.S. Federal Services			$	88,272					11.6		%				$	79,949					11.7		%				$	245,563					10.6		%				$	247,671					12.0		%
U.S. Services			60,975						13.9		%				59,531						12.6		%				173,096						13.0		%				174,032						12.0		%
Outside the U.S.			21,507						14.6		%				26,647						16.7		%				66,822						14.6		%				75,249						15.7		%
Divestiture-related charges (2)			—						NM						—						NM						39,343						NM						1,018						NM
Other (3)			77						NM						906						NM						599						NM						6,712						NM
Selling, general, and administrative expenses			$	170,831					12.7		%				$	167,033					12.7		%				$	525,423					12.8		%				$	504,682					12.6		%
Operating income:
U.S. Federal Services			$	137,862					18.1		%				$	106,126					15.5		%				$	355,944					15.3		%				$	258,403					12.5		%
U.S. Services			44,957						10.2		%				61,481						13.0		%				139,610						10.5		%				195,465						13.5		%
Outside the U.S.			5,940						4.0		%				(1,420)						(0.9)		%				18,856						4.1		%				(863)						(0.2)		%
Amortization of intangible assets			(23,010)						NM						(23,542)						NM						(69,041)						NM						(68,532)						NM
Divestiture-related charges (2)			—						NM						—						NM						(39,343)						NM						(1,018)						NM
Other (3)			(77)						NM						(906)						NM						(599)						NM						(6,712)						NM
Operating income			$	165,672					12.3		%				$	141,739					10.8		%				$	405,427					9.9		%				$	376,743					9.4		%

(1)Percentage of respective revenue, as applicable. Percentages not considered meaningful are marked "NM."

(2)During fiscal years 2025 and 2024, we have divested businesses from our Outside the U.S. Segment. See "Note 6. Divestitures" for additional information.

(3)Other expenses include credits and costs that are not allocated to a particular segment.