Consolidated Statements of Shareholder's Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Redeemable Common Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Total Parsons Equity (Deficit)	Noncontrolling Interest
Beginning balance at Dec. 31, 2018	$ (921,076)			$ (957,025)		$ 12,445	$ (22,957)	$ (967,537)	$ 46,461
Beginning balance, Temporary Equity at Dec. 31, 2018		$ 1,876,309
Comprehensive income
Net income	13,386					9,741		9,741	3,645
Foreign currency translation gain, net	2,547						2,547	2,547
Pension adjustments, net	9						9	9
Adoption of accounting standards | ASC 842	52,608					52,608		52,608
Purchase of treasury stock				(813)		813
Temporary equity, Purchase of treasury stock		(813)
Contributions	708								708
Distributions	(18,822)					164		164	(18,986)
Temporary equity, Distributions		(164)
Ending Balance at Mar. 31, 2019	(870,640)			(957,838)		75,771	(20,401)	(902,468)	31,828
Ending Balance, Temporary Equity at Mar. 31, 2019		$ 1,875,332
Beginning balance at Dec. 31, 2019	1,660,756		$ 146,441	(934,240)	$ 2,649,975	(218,025)	(14,261)	1,629,890	30,866
Comprehensive income
Net income	14,371					12,973		12,973	1,398
Foreign currency translation gain, net	(8,800)						(8,792)	(8,792)	(8)
Pension adjustments, net	(61)						(61)	(61)
Adoption of accounting standards | ASC 2016-13	(1,000)					(1,000)		(1,000)
Contributions	221								221
Distributions	(360)								(360)
Stock-based compensation	2,252				2,252			2,252
Ending Balance at Mar. 31, 2020	$ 1,667,379		$ 146,441	$ (934,240)	$ 2,652,227	$ (206,052)	$ (23,114)	$ 1,635,262	$ 32,117