Condensed Consolidated Statements of Stockholders Equity (Unaudited) - USD ($) $ in Thousands	Total	As filed	Restatement adjustments	Total PAE Incorporated Stockholders’ Equity	Total PAE Incorporated Stockholders’ Equity As filed	Common Stock	Common Stock As filed	Common Stock Restatement adjustments	Additional Paid-in Capital	Additional Paid-in Capital As filed	Additional Paid-in Capital Restatement adjustments	Accumulated Deficit	Accumulated Deficit As filed	Accumulated Other Comprehensive (Loss) / Income	Accumulated Other Comprehensive (Loss) / Income As filed	Noncontrolling Interests	Noncontrolling Interests As filed
Beginning balance at Dec. 31, 2019	$ (11,909)	$ (11,909)	$ 0	$ (43,760)	$ (43,760)	$ 2	$ 3	$ (1)	$ 101,743	$ 101,742	$ 1	$ (145,371)	$ (145,371)	$ (134)	$ (134)	$ 31,851	$ 31,851
Beginning balance (in shares) at Dec. 31, 2019	21,127,823					21,127,823	282,047	20,845,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 26,150	(4,777)	30,927	25,984								25,984				166
Other comprehensive income, net	(695)	$ (695)	$ 0	(695)										(695)
Equity contributions from venture partners	165			13					13							152
Equity infusion from Gores	307,941			307,941		$ 5			307,936
Equity infusion from Gores (in shares)						46,999,787
Private placement	212,910			212,910		$ 2			212,908
Private placement (in shares)						23,913,044
Payment to Shay stockholders	(424,243)			(424,243)					(424,243)
Ending balance at Mar. 29, 2020	110,319			78,150		$ 9			198,357			(119,387)		(829)		32,169
Ending balance (in shares) at Mar. 29, 2020						92,040,654
Beginning balance at Dec. 31, 2020	$ 106,185			73,949		$ 9			188,685			(116,621)		1,876		32,236
Beginning balance (in shares) at Dec. 31, 2020	92,040,654					92,040,654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 12,273			13,384								13,384				(1,111)
Other comprehensive income, net	(995)			(995)										(995)
Equity contributions from venture partners	467															467
Deconsolidation of venture	188															188
Purchase of noncontrolling interest	(15,174)			(17,398)					(17,398)							2,224
Stock-based compensation tax withholding obligation	(5,659)			(5,659)					(5,659)
Stock-based compensation	2,270			2,270					2,270
Ending balance at Mar. 28, 2021	$ 99,555			$ 65,551		$ 9			$ 167,898			$ (103,237)		$ 881		$ 34,004
Ending balance (in shares) at Mar. 28, 2021	93,069,815					92,040,654