Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests	$ 35,276	$ 23,843
Other comprehensive income, net of tax
Foreign currency translation adjustment, net of tax	(177)	2,874
Pension adjustments, net of tax	1	22
Comprehensive income including noncontrolling interests, net of tax	35,100	26,739
Comprehensive income attributable to noncontrolling interests, net of tax	(9,723)	(3,177)
Comprehensive income attributable to Parsons Corporation, net of tax	$ 25,377	$ 23,562