Revenue Recognition - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 1,872,851	$ 2,019,787	$ 1,963,238
Concentration risk threshold percentage	5.00%
Net contract assets (liabilities)	$ 24,164
Revenue related to contract liabilities	20,600	17,600
Aggregate net changes in estimates on contracts, increases to operating income	$ 14,800	$ 12,700	$ 7,900
Changes in estimates on contracts, impact on diluted earnings per share	$ 0.65	$ 0.54	$ 0.36
Effective tax rate	18.20%	20.20%	14.40%
Revenue recognized from previously satisfied performance obligations	$ 4,800	$ 1,600	$ 1,400
Department of Health and Human Services
Disaggregation of Revenue [Line Items]
Revenue	$ 415,500	$ 503,900	$ 509,500