Revenue (Tables)

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The Company disaggregates revenue from clients into categories that depict how the nature, amount, and uncertainty of revenue and cash flows are affected by economic and business factors. Those categories are client market, client type, and contract mix.

	Three Months Ended March 31,
	2026					2025
	Dollars		Percent			Dollars		Percent
Client Market:
Energy, environment, infrastructure, and disaster recovery	$	232,310		53	%	$	238,716		49	%
Health and social programs		142,429		33	%		169,270		35	%
Security and other civilian & commercial		62,761		14	%		79,632		16	%
Total	$	437,500		100	%	$	487,618		100	%

	Three Months Ended March 31,
	2026					2025
	Dollars		Percent			Dollars		Percent
Client Type:
U.S. federal government	$	182,287		42	%	$	238,996		49	%
U.S. state and local government		77,043		18	%		77,111		16	%
International government		31,838		7	%		27,089		5	%
Total Government		291,168		67	%		343,196		70	%
Commercial		146,332		33	%		144,422		30	%
Total	$	437,500		100	%	$	487,618		100	%

	Three Months Ended March 31,
	2026					2025
	Dollars		Percent			Dollars		Percent
Contract Mix:
Time-and-materials	$	191,955		44	%	$	208,993		43	%
Fixed-price		213,769		49	%		238,120		49	%
Cost-based		31,776		7	%		40,505		8	%
Total	$	437,500		100	%	$	487,618		100	%

Schedule of Contract Assets and Liabilities and Changes in Contract Balances

The following table summarizes the contract assets and liabilities as of March 31, 2026 and December 31, 2025:

	Financial Statement Classification	March 31, 2026			December 31, 2025			$ Change
Contract assets	Contract assets	$	192,231		$	186,684		$	5,547
Contract liabilities - current	Contract liabilities		(44,635	)		(43,444	)		(1,191	)
Contract liabilities - non-current	Other long-term liabilities		(12,017	)		(3,043	)		(8,974	)
Net contract assets (liabilities)		$	135,579		$	140,197		$	(4,618	)