PAE (PAE) 10-Q 5 Aug 21 2021 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 27, 2021	Aug. 03, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 27, 2021
Document Transition Report	false
Entity File Number	1-38643
Entity Registrant Name	PAE INCORPORATED
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-3173473
Entity Address, Address Line One	7799 Leesburg Pike
Entity Address, Address Line Two	Suite 300 North
Entity Address, City or Town	Falls Church
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22043
City Area Code	703
Local Phone Number	717-6000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		93,069,815
Entity Central Index Key	0001720821
Amendment Flag	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Class A Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Class A Common Stock
Trading Symbol	PAE
Security Exchange Name	NASDAQ
Warrants
Entity Information [Line Items]
Title of 12(b) Security	Warrants
Trading Symbol	PAEWW
Security Exchange Name	NASDAQ

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Income Statement [Abstract]
Revenues	$ 747,198	$ 643,303	$ 1,495,765	$ 1,260,556
Cost of revenues	564,952	496,678	1,131,618	961,886
Selling, general and administrative expenses	142,776	105,451	288,067	242,777
Amortization of intangible assets	12,631	8,047	24,846	16,094
Total operating expenses	720,359	610,176	1,444,531	1,220,757
Program profit	26,839	33,127	51,234	39,799
Other operating income, net	3,922	1,168	5,723	1,954
Operating income	30,761	34,295	56,957	41,753
Interest expense, net	(13,160)	(13,757)	(25,674)	(34,705)
Other (loss) income, net	(66)	(19,467)	1,134	10,645
Income before income taxes	17,535	1,071	32,417	17,693
Expense (benefit) from income taxes	2,626	3,752	5,235	(5,776)
Net income (loss)	14,909	(2,681)	27,182	23,469
Noncontrolling interest in earnings of ventures	559	765	(552)	931
Net income (loss) attributed to PAE Incorporated	$ 14,350	$ (3,446)	$ 27,734	$ 22,538
Net income (loss) per share attributed to PAE Incorporated:
Basic (in dollars per share)	$ 0.15	$ (0.04)	$ 0.30	$ 0.30
Diluted (in dollars per share)	$ 0.15	$ (0.04)	$ 0.29	$ 0.30
Weighted average shares outstanding:
Basic (in shares)	93,097,652	92,044,098	92,860,800	75,890,028
Diluted (in shares)	95,511,269	92,787,379	95,193,549	76,273,931

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 14,909	$ (2,681)	$ 27,182	$ 23,469
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net of tax	629	59	(365)	(917)
Other, net	0	142	(1)	424
Other comprehensive income (loss)	629	201	(366)	(493)
Comprehensive income (loss)	15,538	(2,480)	26,816	22,976
Comprehensive income (loss) attributed to noncontrolling interests	552	284	(702)	781
Comprehensive income (loss) attributed to PAE Incorporated	$ 14,986	$ (2,764)	$ 27,518	$ 22,195

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 94,710	$ 85,908
Accounts receivable, net	605,060	585,511
Prepaid expenses and other current assets	63,367	61,607
Total current assets	763,137	733,026
Property and equipment, net	38,229	27,615
Investments	20,361	18,272
Goodwill	593,171	590,668
Intangible assets, net	233,364	258,210
Operating lease right-of-use assets, net	195,245	191,370
Other noncurrent assets	12,938	10,209
Total assets	1,856,445	1,829,370
Current liabilities:
Accounts payable	174,651	152,962
Accrued expenses	118,918	114,222
Customer advances and billings in excess of costs	88,903	106,475
Salaries, benefits and payroll taxes	145,905	145,186
Accrued taxes	11,689	15,582
Current portion of long-term debt, net	6,611	5,961
Operating lease liabilities, current portion	47,257	46,756
Other current liabilities	39,615	45,037
Total current liabilities	633,549	632,181
Deferred income taxes, net	10,324	4,389
Long-term debt, net	863,893	860,306
Long-term operating lease liabilities	150,824	145,569
Warrant liability	49,333	50,467
Other long-term liabilities	31,932	30,273
Total liabilities	1,739,855	1,723,185
Stockholders’ equity:
Preferred stock, $0.0001 par value per share, 1,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.0001 par value per share: 210,000,000 shares authorized; 93,069,815 and 92,040,654 shares issued and outstanding as of June 27, 2021 and December 31, 2020, respectively	9	9
Additional paid-in capital	170,245	188,685
Accumulated deficit	(88,887)	(116,621)
Accumulated other comprehensive income	1,510	1,876
Total PAE Incorporated stockholders' equity	82,877	73,949
Noncontrolling interests	33,713	32,236
Total liabilities and stockholders’ equity	$ 1,856,445	$ 1,829,370

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 27, 2021	Dec. 31, 2020
Stockholders’ equity:
Preferred stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock authorized (in shares)	1,000,000	1,000,000
Preferred stock issued (in shares)	0	0
Preferred stock outstanding (in shares)	0	0
Common stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock authorized (in shares)	210,000,000	210,000,000
Common stock issued (in shares)	93,069,815	92,040,654
Common stock outstanding (in shares)	93,069,815	92,040,654

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders Equity (Unaudited) - USD ($) $ in Thousands	Total	Previously Reported	Revision of Prior Period, Adjustment	Total PAE Incorporated Stockholders’ Equity	Total PAE Incorporated Stockholders’ EquityPreviously Reported	Common Stock	Common StockPreviously Reported	Common StockRevision of Prior Period, Adjustment	Additional Paid-in Capital	Additional Paid-in CapitalPreviously Reported	Additional Paid-in CapitalRevision of Prior Period, Adjustment	Accumulated Deficit	Accumulated DeficitPreviously Reported	Accumulated Other Comprehensive (Loss) / Income	Accumulated Other Comprehensive (Loss) / IncomePreviously Reported	Noncontrolling Interests	Noncontrolling InterestsPreviously Reported
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	282,047	20,845,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	26,150			25,984								25,984				166
Other comprehensive income (loss), net	(695)			(695)										(695)
Distributions to venture partners and other	0
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, 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	282,047	20,845,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	23,469
Other comprehensive income (loss), net	(493)
Ending balance at Jun. 28, 2020	92,866			58,436		$ 9			181,888			(122,833)		(628)		34,430
Ending balance (in shares) at Jun. 28, 2020						92,040,654
Beginning balance at Mar. 29, 2020	110,319			78,150		$ 9			198,357			(119,387)		(829)		32,169
Beginning balance (in shares) at Mar. 29, 2020						92,040,654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,681)			(3,446)								(3,446)				765
Other comprehensive income (loss), net	201			201										201
Distributions to venture partners and other	(443)															(443)
Equity contributions from venture partners	1,939															1,939
Equity infusion from Gores	0
Private placement	0
Payment to Shay stockholders	(20,169)			(20,169)					(20,169)
Stock-based compensation	3,700			3,700					3,700
Ending balance at Jun. 28, 2020	92,866			58,436		$ 9			181,888			(122,833)		(628)		34,430
Ending balance (in shares) at Jun. 28, 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 (loss), 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						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)	$ 27,182
Other comprehensive income (loss), net	(366)
Ending balance at Jun. 27, 2021	$ 116,590			82,877		$ 9			170,245			(88,887)		1,510		33,713
Ending balance (in shares) at Jun. 27, 2021	93,069,815					92,040,654
Beginning balance at Mar. 28, 2021	$ 99,555			65,551		$ 9			167,898			(103,237)		881		34,004
Beginning balance (in shares) at Mar. 28, 2021						92,040,654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14,909			14,350								14,350				559
Other comprehensive income (loss), net	629			629										629
Distributions to venture partners and other	(850)															(850)
Purchase of noncontrolling interest	(8)			(8)					(8)							0
Stock-based compensation	2,355			2,355					2,355
Ending balance at Jun. 27, 2021	$ 116,590			$ 82,877		$ 9			$ 170,245			$ (88,887)		$ 1,510		$ 33,713
Ending balance (in shares) at Jun. 27, 2021	93,069,815					92,040,654

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Operating activities
Net income	$ 27,182	$ 23,469
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	4,747	5,072
Amortization of intangible assets	24,846	16,094
Amortization of debt issuance cost	1,572	7,821
Stock-based compensation	4,625	3,700
Net undistributed income from unconsolidated ventures	(6,568)	(1,739)
Deferred income taxes, net	6,557	(14,110)
Change in fair value of warrant liability	(1,133)	(14,132)
Other non-cash activities, net	(810)	404
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(20,000)	9,607
Accounts payable	21,838	(17,547)
Accrued expenses	5,002	9,845
Customer advances and billings in excess of costs	(17,571)	19,282
Salaries, benefits and payroll taxes	1,000	4,310
Prepaid expenses and other current assets	(2,910)	(841)
Other current and noncurrent liabilities	528	(5,101)
Investments	4,758	1,701
Other noncurrent assets	(6,237)	11,600
Accrued taxes	(3,889)	(3,847)
Net cash provided by operating activities	43,537	55,588
Investing activities
Expenditures for property and equipment	(14,400)	(1,597)
Proceeds from sales of property	231	0
Acquisition of CENTRA Technology, Inc., net of acquired cash	(1,441)	0
Acquisition of Metis Solutions Corporation, net of acquired cash	(521)	0
Acquisition of noncontrolling interest	(14,308)	0
Other investing activities, net	(373)	37
Net cash used in investing activities	(30,812)	(1,560)
Financing activities
Net contributions from noncontrolling interests	490	1,950
Borrowings on long-term debt	125,383	60,468
Repayments on long-term debt	(122,584)	(204,464)
Payment of debt issuance costs	0	(964)
Recapitalization from merger with Gores Holdings III, Inc.	0	605,713
Payment of underwriting and transaction costs	0	(27,267)
Distribution to selling stockholders	0	(419,548)
Stock-based compensation tax withholding obligation	(5,659)	0
Other financing activities, net	(825)	(292)
Net cash (used in) provided by financing activities	(3,195)	15,596
Effect of exchange rate changes on cash and cash equivalents	(728)	810
Net increase in cash and cash equivalents	8,802	70,434
Cash and cash equivalents at beginning of period	85,908	68,035
Cash and cash equivalents at end of period	94,710	138,469
Supplemental cash flow information
Cash paid for interest	27,846	23,278
Cash paid for taxes	$ 7,273	$ 2,796

Description of Business

Description of Business	6 Months Ended
	Jun. 27, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business PAE Incorporated, formerly known as Gores Holdings III, Inc. (“Gores III”), was originally incorporated in Delaware on October 23, 2017 as a special purpose acquisition company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or other similar business combination with one or more target businesses. On September 11, 2018, Gores III consummated its initial public offering (the “IPO”), following which our shares began trading on the Nasdaq Stock Market (“Nasdaq”). Unless the context otherwise indicates, references herein to the “Company" or “PAE” refer to PAE Incorporated and its consolidated subsidiaries. On February 10, 2020 (the “Closing Date”), the Company completed the previously announced business combination (the “Business Combination”) in which Shay Holding Corporation (“Shay”) was acquired by Gores III. The transaction was completed in a multi-step process pursuant to which Shay ultimately merged with and into a wholly-owned subsidiary of Gores III, with the Gores III subsidiary continuing as the surviving company. As a result of the Business Combination, each share of common stock of Shay was cancelled and converted into the right to receive a portion of the consideration payable in connection with the transaction and Gores III acquired Shay (as it existed immediately prior to the Second Merger, as such term is defined in that certain Agreement and Plan of Merger, dated November 1, 2019, by and among Gores III, EAP Merger Sub, Inc., EAP Merger Sub II, LLC, Shay, and Platinum Equity Advisors, LLC (in its capacity as the stockholder representative) (the “Merger Agreement”)) and its subsidiaries. Additionally, the stockholders of Shay as of immediately prior to the transaction held a portion of the common stock of the Company. For accounting purposes, the Business Combination is treated as a reverse acquisition and recapitalization (the “Recapitalization”), in which Shay is considered the accounting acquirer (and legal acquiree) and Gores III is considered the accounting acquiree (and legal acquirer). Accordingly, as of the Closing Date, Shay’s historical results of operations replaced Gores III’s historical results of operations for periods prior to the Business Combination and the results of operations of both companies are included in the accompanying condensed consolidated financial statements for periods following the Closing Date. See Note 6 - “Business Combinations and Acquisitions” for additional information. PAE provides a wide variety of integrated support solutions, including defense and military readiness, diplomacy, intelligence support, business process outsourcing, counter-terrorism solutions, peacekeeping, development, host nation capacity building, aircraft and ground equipment maintenance and logistics, and operations and maintenance of facilities and infrastructure. Customers include agencies of the U.S. Government, such as the Department of Defense (“DoD”) and Department of State (“DoS”), the National Aeronautics and Space Administration (“NASA”), Department of Homeland Security, intelligence community agencies and other civilian agencies, as well as allied foreign governments and international organizations. The Company’s operations are currently organized into the following two reportable segments: • Global Mission Services (“GMS”): GMS provides infrastructure and logistics management, international logistics and stabilization support, and aircraft and vehicle readiness and sustainment support. The segment focuses on customer relationships with DoD, DoS, NASA, and other government agencies for work both in the United States and outside of the United States. • National Security Solutions (“NSS”): NSS provides counter-threat solutions, business process outsourcing, adjudication support services and full life cycle support for complex legal matters. NSS focuses on customer relationships in the areas of intelligence, defense and security, and with civilian agencies. The Company separately presents the costs associated with certain corporate functions as “Corporate”, which primarily include costs that are not reimbursed by the Company’s U.S. Government customers.

Significant Accounting Principl

Significant Accounting Principles and Policies	6 Months Ended
	Jun. 27, 2021
Accounting Policies [Abstract]
Significant Accounting Principles and Policies	Significant Accounting Principles and Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) for annual financial information. In management’s opinion, all adjustments, consisting of only normal recurring adjustments, considered necessary for a fair presentation have been included. The Company closes its books and records on the last Sunday of the calendar quarter to align its financial closing with its business process, which were on June 27, 2021 and June 28, 2020, respectively. The condensed consolidated financial statements and disclosures included herein are labeled based on that convention. This practice only affects interim periods, as the Company’s fiscal year ends on December 31. The condensed consolidated financial statements include the accounts of PAE Incorporated and subsidiaries and ventures in which the Company owns more than 50% or otherwise controls. All intercompany amounts have been eliminated in consolidation. Use of Estimates These condensed consolidated financial statements are prepared in conformity with U.S. GAAP, which requires the use of estimates and assumptions, including assumptions to determine the fair value of acquired assets and liabilities, recoverability of long-lived assets, goodwill, valuation allowances on deferred taxes, inputs used in stock based compensation, inputs in the valuation of the warrants liability and anticipated contract costs and revenues utilized in the earnings recognition process, which affect the reported amounts in the condensed consolidated financial statements and accompanying notes. Due to the size and nature of many of the Company’s programs, the estimation of total revenues and cost at completion is subject to a wide range of variables, including assumptions for timing and risks. Actual results may differ from management’s estimates and changes in these estimates are recorded when known. Update to Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies described in the Company’s Form 10-K/A filed with the SEC on May 7, 2021.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 27, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Pronouncements Adopted In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 is effective in 2021 and interim periods within that year and permits for an early adoption. The Company adopted ASU 2019-12 effective January 1, 2021. The adoption of the guidance did not have a material impact on its financial statements and related disclosures. Accounting Pronouncements Not Yet Adopted

Revenues

Revenues	6 Months Ended
	Jun. 27, 2021
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Disaggregated Revenues Disaggregated revenues by customer type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total DoD $ 194,598 $ 81,621 $ 276,219 Other U.S. government agencies 267,592 131,848 399,440 Commercial and non-U.S. customers 49,153 22,386 71,539 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total DoD $ 357,031 $ 163,821 $ 520,852 Other U.S. government agencies 536,377 251,943 788,320 Commercial and non-U.S. customers 139,496 47,097 186,593 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total DoD $ 204,634 $ 62,096 $ 266,730 Other U.S. government agencies 260,714 49,434 310,148 Commercial and non-U.S. customers 42,506 23,919 66,425 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total DoD $ 392,240 $ 129,275 $ 521,515 Other U.S. government agencies 510,660 120,156 630,816 Commercial and non-U.S. customers 62,398 45,827 108,225 Total $ 965,298 $ 295,258 $ 1,260,556 Revenues by contract type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 285,552 $ 93,653 $ 379,205 Fixed-price 159,955 79,036 238,991 Time and materials 65,836 63,166 129,002 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 546,472 $ 183,747 $ 730,219 Fixed-price 341,259 161,553 502,812 Time and materials 145,173 117,561 262,734 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 299,906 $ 34,288 $ 334,194 Fixed-price 158,247 53,693 211,940 Time and materials 49,701 47,468 97,169 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 565,986 $ 71,192 $ 637,178 Fixed-price 320,285 122,650 442,935 Time and materials 79,027 101,416 180,443 Total $ 965,298 $ 295,258 $ 1,260,556 Disaggregated revenues by geographic location were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total United States $ 266,268 $ 234,706 $ 500,974 International 245,075 1,149 246,224 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total United States $ 555,040 $ 460,576 $ 1,015,616 International 477,864 2,285 480,149 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total United States $ 277,536 $ 133,875 $ 411,411 International 230,318 1,574 231,892 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total United States $ 526,446 $ 292,014 $ 818,460 International 438,852 3,244 442,096 Total $ 965,298 $ 295,258 $ 1,260,556 Remaining Performance Obligations The Company’s remaining performance obligations balance represents the expected revenue to be recognized for the satisfaction of remaining performance obligations on existing contracts. This balance excludes unexercised contract option years and task orders that may be issued underneath an indefinite delivery, indefinite quantity contract. The remaining performance obligations balance as of June 27, 2021 and December 31, 2020 was $1,497.4 million and $1,722.0 million, respectively. Contract assets consist of unbilled receivables, which represent rights to payment for work or services completed but not billed as of the reporting date. Contract assets are recorded as unbilled receivables within accounts receivable, net on the condensed consolidated balance sheets. Contract liabilities are advances and milestone payments from customers on certain contracts that exceed revenue earned to date. Contract liabilities are recorded as customer advances and billings in excess of costs on the condensed consolidated balance sheets. Contract assets and contract liabilities consisted of the following as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 Contract assets $ 376,154 $ 360,552 Contract liabilities $ 88,903 $ 106,475 The increase in contract assets of $15.6 million during the six months ended June 27, 2021 was primarily due to the timing of billings, partially offset by revenue recognized related to the satisfaction of performance obligations. The decrease in contract liabilities of $17.6 million during the six months ended June 27, 2021 was primarily due to the timing of advance payments from customers offset by revenue recognized during the period.

Contract Assets and Contract Li

Contract Assets and Contract Liabilities	6 Months Ended
	Jun. 27, 2021
Revenue from Contract with Customer [Abstract]
Contract Assets and Contract Liabilities	Revenues Disaggregated Revenues Disaggregated revenues by customer type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total DoD $ 194,598 $ 81,621 $ 276,219 Other U.S. government agencies 267,592 131,848 399,440 Commercial and non-U.S. customers 49,153 22,386 71,539 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total DoD $ 357,031 $ 163,821 $ 520,852 Other U.S. government agencies 536,377 251,943 788,320 Commercial and non-U.S. customers 139,496 47,097 186,593 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total DoD $ 204,634 $ 62,096 $ 266,730 Other U.S. government agencies 260,714 49,434 310,148 Commercial and non-U.S. customers 42,506 23,919 66,425 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total DoD $ 392,240 $ 129,275 $ 521,515 Other U.S. government agencies 510,660 120,156 630,816 Commercial and non-U.S. customers 62,398 45,827 108,225 Total $ 965,298 $ 295,258 $ 1,260,556 Revenues by contract type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 285,552 $ 93,653 $ 379,205 Fixed-price 159,955 79,036 238,991 Time and materials 65,836 63,166 129,002 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 546,472 $ 183,747 $ 730,219 Fixed-price 341,259 161,553 502,812 Time and materials 145,173 117,561 262,734 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 299,906 $ 34,288 $ 334,194 Fixed-price 158,247 53,693 211,940 Time and materials 49,701 47,468 97,169 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 565,986 $ 71,192 $ 637,178 Fixed-price 320,285 122,650 442,935 Time and materials 79,027 101,416 180,443 Total $ 965,298 $ 295,258 $ 1,260,556 Disaggregated revenues by geographic location were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total United States $ 266,268 $ 234,706 $ 500,974 International 245,075 1,149 246,224 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total United States $ 555,040 $ 460,576 $ 1,015,616 International 477,864 2,285 480,149 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total United States $ 277,536 $ 133,875 $ 411,411 International 230,318 1,574 231,892 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total United States $ 526,446 $ 292,014 $ 818,460 International 438,852 3,244 442,096 Total $ 965,298 $ 295,258 $ 1,260,556 Remaining Performance Obligations The Company’s remaining performance obligations balance represents the expected revenue to be recognized for the satisfaction of remaining performance obligations on existing contracts. This balance excludes unexercised contract option years and task orders that may be issued underneath an indefinite delivery, indefinite quantity contract. The remaining performance obligations balance as of June 27, 2021 and December 31, 2020 was $1,497.4 million and $1,722.0 million, respectively. Contract assets consist of unbilled receivables, which represent rights to payment for work or services completed but not billed as of the reporting date. Contract assets are recorded as unbilled receivables within accounts receivable, net on the condensed consolidated balance sheets. Contract liabilities are advances and milestone payments from customers on certain contracts that exceed revenue earned to date. Contract liabilities are recorded as customer advances and billings in excess of costs on the condensed consolidated balance sheets. Contract assets and contract liabilities consisted of the following as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 Contract assets $ 376,154 $ 360,552 Contract liabilities $ 88,903 $ 106,475 The increase in contract assets of $15.6 million during the six months ended June 27, 2021 was primarily due to the timing of billings, partially offset by revenue recognized related to the satisfaction of performance obligations. The decrease in contract liabilities of $17.6 million during the six months ended June 27, 2021 was primarily due to the timing of advance payments from customers offset by revenue recognized during the period.

Business Combinations and Acqui

Business Combinations and Acquisitions	6 Months Ended
	Jun. 27, 2021
Business Combination and Asset Acquisition [Abstract]
Business Combinations and Acquisitions	Business Combinations and AcquisitionsAs described in Note 1 - “Description of Business,” the Business Combination was consummated on February 10, 2020. For financial accounting and reporting purposes under U.S. GAAP, the Business Combination was accounted for as a reverse acquisition and recapitalization, with no goodwill or other intangible asset recorded. Under this method of accounting, Gores III (legal acquirer) is treated as the acquired entity and Shay (legal acquiree) is deemed to have issued common stock for the net assets and equity of Gores III consisting of mainly cash, accompanied simultaneously by the Recapitalization. The net assets of Gores III are stated at historical cost, and accordingly the equity and net assets of Shay have not been adjusted to fair value. Consequently, the consolidated assets, liabilities and results of operations of Shay are the historical financial statements of PAE Incorporated and the Gores III assets, liabilities and results of operations are consolidated with the assets, liabilities and results of operations of Shay beginning on the Closing Date. Shares and earnings per share information prior to the Business Combination have been retroactively restated to reflect the exchange ratio established in the Recapitalization. Other than professional fees paid to consummate the transaction, the Business Combination primarily involved the exchange of cash and equity between Gores III, Shay and the stockholders of the respective companies. The aggregate proceeds paid to the Shay Stockholders (as defined below) on the Closing Date was approximately $424.2 million. The remainder of the consideration paid to the Shay Stockholders consisted of 21,127,823 newly issued shares of Class A Common Stock of PAE Incorporated, par value $0.0001 per share (“Class A Common Stock”). In addition to the foregoing consideration paid on the Closing Date, former stockholders of Shay are entitled to receive additional Earn-Out Shares from PAE of up to an aggregate of 4,000,000 shares of Class A Common Stock if the price of Class A Common Stock trading on the Nasdaq exceeds certain thresholds during the five-year period following the completion of the Business Combination. See Note 11 - “Stockholders’ Equity - Earn-Out Agreement” for additional information. The Company also has certain warrants issued by Gores III that remain outstanding after the Business Combination. In connection with the Business Combination, the Company recorded $18.2 million, net of tax as a reduction to additional paid in capital related to the transaction costs. These costs were directly attributable to the Recapitalization. In addition, the Company recorded $3.4 million of transaction costs related to the warrants as non-operating expense in the consolidated statement of operations. During the third quarter of 2020, pursuant to the post-closing adjustment provisions contained in the Merger Agreement, the Company made a post-closing adjustment payment of $20.2 million to the Shay Stockholders. In addition, the Company paid $1.0 million to certain members of PAE management in connection with the post-closing adjustment, and such amount was recorded as compensation expense. CENTRA Technology, Inc. On November 20, 2020, the Company acquired 100% of the capital stock of CENTRA Technology, Inc. (“CENTRA”) for a consideration paid of $225.3 million, net. The results of CENTRA’s operations have been included in the Company’s condensed consolidated financial statements since that date. This business combination expands and differentiates PAE's capabilities in intelligence analysis, communication systems integration and research and development services for intelligence and defense customers. During the second quarter of 2021, the Company made a payment of $1.4 million related to the working capital adjustment, pursuant to the Stock Purchase Agreement (as defined below). The Company has completed the purchase accounting valuation for this acquisition and recorded final purchase accounting adjustments. As a result, the Company recognized fair values of assets acquired of $177.4 million and assumed liabilities of $77.2 million allocating $126.4 million to goodwill and $74.1 million to intangible assets. The goodwill of $126.4 million arising from the acquisition relates primarily to revenue and cost synergies. This goodwill is not deductible for tax purposes. Metis Solutions Corporation On November 23, 2020, the Company completed the acquisition of 100% of the capital stock of Metis Solutions Corporation (“Metis”) for a consideration paid of $95.7 million in cash. The results of Metis’s operations have been included in the condensed consolidated financial statements since that date. This business combination expands and differentiates PAE's capabilities in intelligence analysis, training and program support for intelligence and defense customers. During the second quarter of 2021, pursuant to the purchase price adjustment provisions of the Metis Merger Agreement (as defined below), the Company made a payment of $0.5 million to the option holders as a result of a closing adjustment. The Company has completed the purchase accounting valuation for this acquisition and recorded final purchase accounting adjustments. As a result, the Company recognized fair values of assets acquired of $60.4 million and assumed liabilities of $20.7 million allocating $56.5 million to goodwill and $37.8 million to intangible assets. The goodwill of $56.5 million arising from the acquisition relates primarily to revenue and cost synergies. This goodwill is not deductible for tax purposes.

Accounts Receivable, net

Accounts Receivable, net	6 Months Ended
	Jun. 27, 2021
Receivables [Abstract]
Accounts Receivable, net	Accounts Receivable, net The components of accounts receivable, net consisted of the following as of the dates presented (in thousands): June 27, December 31, 2021 2020 Billed receivables $ 234,660 $ 227,787 Unbilled receivables 374,209 360,552 Less allowance for credit losses (3,809) (2,828) Total accounts receivables, net $ 605,060 $ 585,511 As of June 27, 2021 approximately 93.6% of the Company’s accounts receivable are with the U.S. government.

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, net	6 Months Ended
	Jun. 27, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, net	Goodwill and Intangible Assets, net Goodwill There was no impairment for the three month and six month periods ended June 27, 2021 and June 28, 2020, respectively. Intangible Assets, net The components of intangible assets, net consisted of the following as of the dates presented (in thousands): June 27, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 390,900 $ (172,534) $ 218,366 Technology 1,700 (1,700) — Trade name 24,800 (9,802) 14,998 Total $ 417,400 $ (184,036) $ 233,364 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 390,900 $ (149,163) $ 241,737 Technology 1,700 (1,700) — Trade name 24,800 (8,327) 16,473 Total $ 417,400 $ (159,190) $ 258,210 As of the six months period ended June 27, 2021, customer relationships and trade name intangibles had weighted average remaining useful lives of 7.8 years and 5.5 years, respectively. For the six months ended June 27, 2021 and June 28, 2020, amortization expense was approximately $24.8 million and $16.1 million, respectively. For the three months ended June 27, 2021 and June 28, 2020, amortization expense was approximately $12.6 million and $8.0 million, respectively. Estimated amortization expense in future years is expected to be: As of June 27, 2021 Remainder of 2021 $ 25,261 2022 50,089 2023 40,666 2024 33,782 2025 28,015 Thereafter 55,551 Total $ 233,364

Consolidated Ventures

Consolidated Ventures	6 Months Ended
	Jun. 27, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated Ventures	Consolidated Ventures The Company consolidates an investment when it has determined that the investment is a variable interest entity (“VIE”) and that the Company is the primary beneficiary. As the primary beneficiary, the Company has a risk and obligation to absorb any losses significant to the VIE and the power, through voting rights or similar rights, to direct the activities that could impact economic performance of the VIE. The use of the assets of the VIEs to settle the Company’s liabilities is subject to the approval of the managing body of each VIE. The cash flows generated by these VIEs are included within the Company’s condensed consolidated statements of cash flows. The condensed consolidated balance sheets include the following amounts from these consolidated VIEs as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 Assets Total assets $ 148,480 $ 145,664 Liabilities and equity Total liabilities $ 100,732 $ 96,318 Total equity 47,748 49,346 Total liabilities and equity $ 148,480 $ 145,664 The condensed consolidated statements of operations include the following amounts from consolidated VIEs for the periods presented ( in thousands ): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Income statements Revenues $ 111,486 $ 94,454 $ 203,013 $ 181,644 Cost of revenues 90,989 76,634 166,100 145,159 Selling, general and administrative expenses 18,793 15,864 36,291 33,881 Total operating expenses 109,783 92,498 202,391 179,040 Program (loss) income 1,703 1,956 622 2,604 Other (loss) income, net (395) 840 (619) (209) Net income $ 1,308 $ 2,796 $ 3 $ 2,395 DZSP 21 LLC

Debt

Debt	6 Months Ended
	Jun. 27, 2021
Debt Disclosure [Abstract]
Debt	Debt Long-term debt consisted of the following as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 First Term Loan $ 887,775 $ 890,000 Other debt $ 5,024 $ — Total debt 892,799 890,000 Unamortized discount and debt issuance costs (22,295) (23,733) Total debt, net of discount and debt issuance costs 870,504 866,267 Less current maturities of long-term debt (6,611) (5,961) Total long-term debt, net of current $ 863,893 $ 860,306 Credit Agreements Term Loan On October 19, 2020, the Company refinanced the 2016 credit agreements (comprised of (i) a first lien term loan credit agreement, as amended; (ii) a second lien term loan credit agreement, as amended; and (iii) a revolving credit facility, as amended, each dated as of October 26, 2016) (the “2016 Credit Agreements”) and entered into new senior secured credit facilities (the “2020 Credit Agreements”). The 2020 Credit Agreements provide for borrowings up to $890.0 million. The 2020 Credit Agreements established a $740.0 million term loan facility maturing in October 2027 priced at LIBOR plus a spread of 4.5%, a $150.0 million delayed draw term loan facility maturing in October 2027 priced at LIBOR plus a spread of 4.5% (together the “First Term Loan”), and a $175.0 million senior secured revolving credit facility (the “2020 ABL Credit Agreement”) maturing in October 2025 priced at LIBOR plus a spread of 1.8% to 2.3%. The 2020 Credit Agreements require the Company to comply with specified financial covenants under certain circumstances, including the maintenance of certain leverage ratios. The 2020 Credit Agreements also contain various non-financial covenants, including affirmative covenants with respect to reporting requirements and maintenance of business activities, and negative covenants that, among other things, may limit or impose restrictions on the Company’s ability to alter the character of the business, consolidate, merge, or sell assets, incur liens or additional indebtedness, make investments, and undertake certain additional actions. PAE was in compliance with the financial covenants under the 2020 Credit Agreements as of June 27, 2021 and December 31, 2020, respectively. Equipment Note The Company, through DZSP, entered into a line of credit with Bank of America for the financing of program specific equipment through the issuance of secured loan notes. Each note represents a separate and independent financing of equipment. As of June 27, 2021, PAE has one outstanding equipment loan note (the “Equipment Note”) totaling to $5.0 million with a maturity date of March 2028. The interest rate per annum applicable to the Equipment Note is equal to a fixed rate of 2.8%. Future principal maturities of the Company’s long-term debt are summarized as follows ( in thousands ): As of June 27, 2021 Remainder of 2021 $ 7,067 2022 9,587 2023 9,607 2024 9,627 2025 9,648 Thereafter 847,263 Total $ 892,799 As of June 27, 2021 and December 31, 2020, the available borrowing capacity under the 2020 ABL Credit Agreement was approximately $151.6 million and $132.8 million, respectively. Interest Rates on Credit Agreements The interest rate per annum applicable to amounts borrowed under the First Term Loan is equal to either the Base Rate (as defined below) or the LIBO Rate (as defined below), in either case, plus (i) 4.5% in the case of the Base Rate loans and (ii) 3.5% in the case of LIBO Rate loans. The “Base Rate” is defined as a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus one half of one percent, (b) the rate of interest in effect for such day as publicly announced from time to time by Bank of America (“BofA”) as its “prime rate,” and (c) the LIBO Rate for a LIBO Rate Term Loan with a one month interest period commencing on such day plus 1.0%. The “prime rate” is a rate set by BofA based upon various factors including BofA’s costs and desired return, general economic conditions and other factors. The “LIBO Rate” is defined as the rate per annum equal to the London Interbank Offered Rate or a comparable or successor rate, whichever rate is approved by the Administrative Agent (as that term is defined in the 2020 Credit Agreements). As of June 27, 2021 and December 31, 2020, the applicable interest rate on the amounts borrowed under the First Term Loan was 5.3% for each period, respectively. The interest rate per annum applicable to the 2020 Credit Agreements is equal to either a Base Rate or a LIBO Rate plus (i) a range of 0.8% to 1.3% in the case of Base Rate loans and (ii) a range of 1.8% to 2.3% in the case of LIBO Rate loans, each based on average availability as of the first day of each quarter. As of June 27, 2021 and December 31, 2020, the applicable interest rate on amounts borrowed under the 2020 Revolving Credit Facility was 4.0% for each period, respectively. In addition, the LIBO Rate is the subject of recent national, international, and other regulatory guidance and proposals for reform and replacement. In July 2017, the Chief Executive of the U.K. Financial Conduct Authority (the “U.K. FCA”), which regulates LIBO Rate, announced that the U.K. FCA will no longer persuade or compel banks to submit rates for the calculation of the LIBO Rate benchmark after 2021. This announcement indicates that the continuation of LIBO Rate on the current basis cannot and will not be guaranteed after 2021, and it appears likely that LIBO Rate will be discontinued or modified. The consequences of the discontinuance of the LIBO Rate benchmark cannot be entirely predicted but could include an increase in the cost of our variable rate indebtedness. Letters of Credit The Company had ten outstanding letters of credit for program and insurance requirements totaling approximately $23.4 million as of June 27, 2021 and 13 outstanding letters of credit for program and insurance requirements totaling approximately $23.9 million as of December 31, 2020.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 27, 2021
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Authorized and Outstanding Stock In connection with the Business Combination, the Company made changes to its capital stock. The Company’s amended and restated certificate of incorporation authorizes the issuance of 211,000,000 shares of capital stock, par value of $0.0001 per share, consisting of (a) 210,000,000 shares of Class A common stock, and (b) 1,000,000 shares of preferred stock. As a result of the Business Combination, the shares issued to Shay Stockholders are reflected as if they were issued and outstanding as of the earliest reported period to reflect the new capital structure. Earn-Out Agreement In connection with the Business Combination, stockholders of Shay immediately prior to the transaction (which stockholders consisted of certain affiliates of Platinum Equity, LLC and members of PAE management (the “Shay Stockholders”)) are entitled to receive up to an aggregate of 4,000,000 additional shares of Class A Common Stock (the “Earn-Out Shares”) if at any time during the five-year period following the Closing Date (the “Earn-Out Period”) the volume weighted average closing sale price of one share of Class A Common Stock on the Nasdaq (or the exchange which shares of Class A Common Stock are then listed) for a period of at least 10 days out of 20 consecutive trading days (the “Common Share Price”) exceeds certain thresholds, as described below. The thresholds (each a “Triggering Event”) causing the Earn-Out Shares to be issued by the Company to the Shay Stockholders is any such event that occurs within the Earn-Out period as follows: (i) a one-time issuance of 1,000,000 shares if the Common Share Price is greater than $13.00; (ii) a one-time issuance of 1,000,000 shares if the Common Share Price is greater than $15.50; (iii) a one-time issuance of 1,000,000 shares if the Common Share Price is greater than $18.00; and (iv) a one-time issuance of 1,000,000 shares if the Common Share Price is greater than $20.50. Further, if during the Earn-Out Period there is a change in control (as defined in the Merger Agreement) that results in the holders of Class A Common Stock receiving a per share price in respect of their Class A Common Stock that is equal to or greater than the applicable Common Share Price required in connection with any Triggering Event (an “Acceleration Event”), then any such Triggering Event that has not previously occurred will be deemed to have occurred, and the Company must issue Earn-Out Shares accordingly. If no Triggering Event is achieved within the Earn-Out Period, the Company will not be required to issue the Earn-Out Shares. No Triggering Event was achieved during the three month and six month periods ended June 27, 2021.

Net Income (loss) Per Share

Net Income (loss) Per Share	6 Months Ended
	Jun. 27, 2021
Earnings Per Share [Abstract]
Net Income (loss) Per Share	Net Income (loss) Per Share Basic net income (loss) per common share is determined by dividing the net income (loss) attributed to stockholders by the weighted average number of common shares outstanding during the period presented. Diluted income (loss) per share is determined by adjusting the weighted average number of shares of common stock and common stock equivalents outstanding for the dilutive effect of common stock equivalents for the periods presented. The following table sets forth the computation of basic and diluted income (loss) per share attributable to the Company’s common stockholders for the periods presented ( in thousands, except shares and per share amounts ): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Numerator: Net income (loss) attributed to PAE Incorporated $ 14,350 $ (3,446) $ 27,734 $ 22,538 Denominator: Basic weighted average shares 93,097,652 92,044,098 92,860,800 75,890,028 Diluted weighted average shares 95,511,269 92,787,379 95,193,549 76,273,931 Basic income (loss) per share $ 0.15 $ (0.04) $ 0.30 $ 0.30 Diluted income (loss) per share $ 0.15 $ (0.04) $ 0.29 $ 0.30 The Company has not included the effect of 19,999,985 shares of Common Stock issuable upon the exercise of warrants in the calculation of diluted net income (loss) per share for the three months and six months ended June 27, 2021. Warrants are excluded when the exercise price exceeds the average market value of the Company’s common stock price during the applicable period. The Company has not included the effect of 4,000,000 Earn-Out Shares in the calculation of basic and diluted net income (loss) per share for the three months and six months ended June 27, 2021. The condition for the issuance of these shares is based on the weighted average closing sale price of the Company’s Class A Common Stock and such condition has not been met as of June 27, 2021. Unvested RSUs and PSUs will not impact the calculation of basic earnings per share (“EPS”) until vested, in which case they would be included in the total weighted average number of shares. All potential dilutive securities, which include unvested RSUs, are included in the diluted EPS calculation. Unvested PSUs are included in the calculation of diluted EPS to the extent that the performance criteria have been achieved.

Leases

Leases	6 Months Ended
	Jun. 27, 2021
Leases [Abstract]
Leases	Leases As of June 27, 2021, the Company had right-of-use (“ROU”) assets, net of $195.2 million and lease liabilities of $198.1 million recorded on the condensed consolidated balance sheet. The Company rents certain facilities and equipment under operating leases. The Company’s total lease cost is recorded primarily within selling, general and administrative expenses on the condensed consolidated statements of operations. Rents which are directly chargeable to a project are charged to cost of revenues. During the three month and six month periods ended June 27, 2021, the Company recognized operating lease costs of approximately $15.2 million and $30.8 million, respectively. The Company’s future minimum operating lease payments for noncancelable operating leases were as follows ( in thousands ): June 27, 2021 Remainder of 2021 $ 24,623 2022 47,194 2023 42,678 2024 34,600 2025 28,185 Thereafter 61,793 Total future minimum lease payments 239,073 Less imputed interest 40,992 Present value of minimum lease payments 198,081 Less current maturities of lease liabilities 47,257 Long-term lease liabilities $ 150,824 The weighted-average remaining lease term and the weighted-average discount rate for the Company’s operating leases were approximately 6.5 years and 6.1%, respectively, at June 27, 2021. The Company made cash payments of approximately $12.2 million and $24.2 million for operating leases for the three month and six month periods ended June 27, 2021, which are included in cash flows from operating activities in the condensed consolidated statement of cash flows.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 27, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants at the measurement date. The valuation techniques the Company utilizes to measure the fair value of financial instruments are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect internal market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in observable active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Significant inputs to the valuation model are unobservable and reflect the Company’s own estimates and assumptions. The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, and amounts included in other current assets and current liabilities that meet the definition of a financial instrument approximate fair value because of the short-term nature of these amounts. The carrying value of the Company’s outstanding debt obligations approximates its fair value. The fair value of long-term debt is calculated using Level 2 inputs, based on interest rates available for debt with terms and maturities similar to the Company’s 2020 Credit Agreements. The warrant liability is measured at fair value at each reporting period and changes in fair value are recorded in other income, net. The public warrants liability is measured using Level 1 inputs based on observable active markets. The private placement warrants liability is measured using Level 3 inputs using the Black-Scholes option pricing model. The significant assumptions the Company used in the model are: Valuation Inputs June 27, 2021 December 31, 2020 Asset price $ 9.1 $ 9.2 Exercise price $ 11.5 $ 11.5 Contractual term 3.6 4.1 Volatility 50.0 % 50.0 % Risk-free rate of return 0.6 % 0.3 % Dividend yield — % — % Details of the changes in fair value for the public warrants and private placement warrants are as follows: Public warrant liability June 27, 2021 Public warrant liability as of December 31 $ 30,667 Changes in fair value 399 Ending public warrant liability $ 31,066 Private warrant liability June 27, 2021 Private warrant liability as of December 31 $ 19,800 Changes in fair value (1,533) Ending private warrant liability $ 18,267

Legal Proceedings, Commitments,

Legal Proceedings, Commitments, and Contingencies	6 Months Ended
	Jun. 27, 2021
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings, Commitments, and Contingencies	Legal Proceedings, Commitments, and ContingenciesThe Company is a party to, or has property subject to, litigation and other proceedings. Management believes the probability is remote that the outcome of the matters will have a material adverse effect on its operations as a whole, notwithstanding that the unfavorable resolution of any matter may have a material effect on net earnings in a future period. The Company cannot predict the outcome of legal proceedings and loss or range of loss contingencies with certainty.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 27, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company's operations and reportable segments are organized around the nature of the services and products provided to customers. The Company defines its reportable segments based on the way the CODM manages the operations of the Company for purposes of allocating resources and assessing performance. The GMS operating segment provides support to the U.S. Government and its partners within and outside the United States providing sustainment, training and readiness support and advancing foreign policy objectives. The NSS operating segment provides a wide-ranging portfolio of offerings that support all facets of national security, including intelligence, homeland security and civil government missions. While the CODM uses a variety of different measures to evaluate the Company’s segments, the primary measures used to evaluate segment performance and allocate resources are revenues and operating income. As a result, interest expense, net and provision for income taxes as recorded on the condensed consolidated statements of operations are not allocated to the Company’s operating segments. The following table shows information by reportable segment for the periods presented (in thousands): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Revenues GMS $ 511,343 $ 507,854 $ 1,032,904 $ 965,298 NSS 235,855 135,449 462,861 295,258 Corporate — — — — Total revenues $ 747,198 $ 643,303 $ 1,495,765 $ 1,260,556 Operating income (loss) GMS $ 28,700 $ 31,537 $ 53,214 $ 44,140 NSS 9,248 7,725 20,638 12,092 Corporate (7,187) (4,967) (16,895) (14,479) Total operating income $ 30,761 $ 34,295 $ 56,957 $ 41,753 Amortization of intangible assets GMS $ 4,161 $ 4,115 $ 8,322 $ 8,231 NSS 8,470 3,932 16,524 7,863 Corporate — — — — Total amortization of intangible assets $ 12,631 $ 8,047 $ 24,846 $ 16,094 Under U.S. Government cost accounting standards, indirect costs including depreciation expense are collected in numerous indirect cost pools, which are then collectively allocated to the Company’s reportable segments based on a representative causal or beneficial relationship of the costs in the pool to the costs in the base. While depreciation expense is a component of the allocated costs, the allocation process precludes depreciation expense from being specifically identified by the Company’s individual reportable segments. For this reason, depreciation expense by reportable segment is not presented separately above. Asset information by segment is not a key measure of performance used by the CODM and therefore segment assets are not presented. Less than 10.0% of the Company’s revenues and tangible long-lived assets are generated by or owned by entities outside of the United States. Therefore, additional segment financial information by geographic location is not presented.

Related-Party Transactions

Related-Party Transactions	6 Months Ended
	Jun. 27, 2021
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party Transactions Tax Overpayment/Underpayment Amount In connection with the Business Combination, the Shay Stockholders are entitled to a payment of the net cash savings in U.S. federal, state and local income tax that the post-closing company actually realizes (or is deemed to realize in certain circumstances) in periods after the Closing Date. The liability for this estimated payment and the corresponding charge to equity of $4.7 million are reflected in the Company’s consolidated balance sheet as of June 27, 2021. Advisory Services During the six months ended June 27, 2021, there were no management fees, transaction and advisory fee recognized related to any of the Company’s affiliates. During the six months ended June 28, 2020, the Company recognized management fees, transaction and advisory fees, and related expenses of approximately $15.8 million. These expenses were for services rendered by one or more affiliates of Platinum Equity, LLC. As a result of the Business Combination, $15.0 million was included with other similar transactional expenses and recorded as a reduction to the recapitalized equity and $0.8 million was recorded in selling, general and administrative expenses.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 27, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s provision for income tax expense (benefits) was approximately $2.6 million and $5.2 million and its effective income tax rates were 15.0% and 16.1% for the three months and six months period ended June 27, 2021. The Company’s provision for income tax expense (benefits) were approximately $3.8 million, and $(5.8) million and its effective income tax rates were 350.3% and (32.6)% for the three months and six months periods ended June 28, 2020, respectively. The provision for income taxes for the period ended June 27, 2021 differed from the U.S. federal statutory rate computed by applying the U.S. federal statutory rate to income or loss before income taxes primarily due to the benefit of Foreign Derived Intangible Income (“FDII”), nontaxable income including the fair value adjustment for warrants, offset by the effect of foreign operations. The provision for income taxes for the period ended June 28, 2020 differed from the U.S. federal statutory rate computed by applying the U.S. federal statutory rate to income or loss before income taxes primarily due to the benefit of FDII, increased prior year interest deduction under the Coronavirus Aid, Relief and Economic Security Act (as amended, the “CARES Act”) adjustments, nontaxable income including the fair value adjustment for warrants, and settlement of foreign taxes, offset by disallowed compensation deduction under Internal Revenue Code Section 162(m) and disallowed transaction costs.

Significant Accounting Princi_2

Significant Accounting Principles and Policies (Policies)	6 Months Ended
	Jun. 27, 2021
Accounting Policies [Abstract]
Segment Reporting	The Company’s operations are currently organized into the following two reportable segments: • Global Mission Services (“GMS”): GMS provides infrastructure and logistics management, international logistics and stabilization support, and aircraft and vehicle readiness and sustainment support. The segment focuses on customer relationships with DoD, DoS, NASA, and other government agencies for work both in the United States and outside of the United States. • National Security Solutions (“NSS”): NSS provides counter-threat solutions, business process outsourcing, adjudication support services and full life cycle support for complex legal matters. NSS focuses on customer relationships in the areas of intelligence, defense and security, and with civilian agencies.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) for annual financial information. In management’s opinion, all adjustments, consisting of only normal recurring adjustments, considered necessary for a fair presentation have been included. The Company closes its books and records on the last Sunday of the calendar quarter to align its financial closing with its business process, which were on June 27, 2021 and June 28, 2020, respectively. The condensed consolidated financial statements and disclosures included herein are labeled based on that convention. This practice only affects interim periods, as the Company’s fiscal year ends on December 31. The condensed consolidated financial statements include the accounts of PAE Incorporated and subsidiaries and ventures in which the Company owns more than 50% or otherwise controls. All intercompany amounts have been eliminated in consolidation.
Use of Estimates	Use of Estimates These condensed consolidated financial statements are prepared in conformity with U.S. GAAP, which requires the use of estimates and assumptions, including assumptions to determine the fair value of acquired assets and liabilities, recoverability of long-lived assets, goodwill, valuation allowances on deferred taxes, inputs used in stock based compensation, inputs in the valuation of the warrants liability and anticipated contract costs and revenues utilized in the earnings recognition process, which affect the reported amounts in the condensed consolidated financial statements and accompanying notes. Due to the size and nature of many of the Company’s programs, the estimation of total revenues and cost at completion is subject to a wide range of variables, including assumptions for timing and risks. Actual results may differ from management’s estimates and changes in these estimates are recorded when known.
Accounting Pronouncements Adopted and Accounting Pronouncements Not Yet Adopted	Accounting Pronouncements Adopted In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 is effective in 2021 and interim periods within that year and permits for an early adoption. The Company adopted ASU 2019-12 effective January 1, 2021. The adoption of the guidance did not have a material impact on its financial statements and related disclosures. Accounting Pronouncements Not Yet Adopted
Fair Value of Financial Instruments	Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants at the measurement date. The valuation techniques the Company utilizes to measure the fair value of financial instruments are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect internal market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in observable active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Significant inputs to the valuation model are unobservable and reflect the Company’s own estimates and assumptions. The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, and amounts included in other current assets and current liabilities that meet the definition of a financial instrument approximate fair value because of the short-term nature of these amounts. The carrying value of the Company’s outstanding debt obligations approximates its fair value. The fair value of long-term debt is calculated using Level 2 inputs, based on interest rates available for debt with terms and maturities similar to the Company’s 2020 Credit Agreements.

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 27, 2021
Revenue from Contract with Customer [Abstract]
Disaggregated Revenues	Disaggregated revenues by customer type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total DoD $ 194,598 $ 81,621 $ 276,219 Other U.S. government agencies 267,592 131,848 399,440 Commercial and non-U.S. customers 49,153 22,386 71,539 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total DoD $ 357,031 $ 163,821 $ 520,852 Other U.S. government agencies 536,377 251,943 788,320 Commercial and non-U.S. customers 139,496 47,097 186,593 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total DoD $ 204,634 $ 62,096 $ 266,730 Other U.S. government agencies 260,714 49,434 310,148 Commercial and non-U.S. customers 42,506 23,919 66,425 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total DoD $ 392,240 $ 129,275 $ 521,515 Other U.S. government agencies 510,660 120,156 630,816 Commercial and non-U.S. customers 62,398 45,827 108,225 Total $ 965,298 $ 295,258 $ 1,260,556 Revenues by contract type were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 285,552 $ 93,653 $ 379,205 Fixed-price 159,955 79,036 238,991 Time and materials 65,836 63,166 129,002 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total Cost-reimbursable $ 546,472 $ 183,747 $ 730,219 Fixed-price 341,259 161,553 502,812 Time and materials 145,173 117,561 262,734 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 299,906 $ 34,288 $ 334,194 Fixed-price 158,247 53,693 211,940 Time and materials 49,701 47,468 97,169 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total Cost-reimbursable $ 565,986 $ 71,192 $ 637,178 Fixed-price 320,285 122,650 442,935 Time and materials 79,027 101,416 180,443 Total $ 965,298 $ 295,258 $ 1,260,556 Disaggregated revenues by geographic location were as follows ( in thousands ): Three Months Ended June 27, 2021 GMS NSS Total United States $ 266,268 $ 234,706 $ 500,974 International 245,075 1,149 246,224 Total $ 511,343 $ 235,855 $ 747,198 Six Months Ended June 27, 2021 GMS NSS Total United States $ 555,040 $ 460,576 $ 1,015,616 International 477,864 2,285 480,149 Total $ 1,032,904 $ 462,861 $ 1,495,765 Three Months Ended June 28, 2020 GMS NSS Total United States $ 277,536 $ 133,875 $ 411,411 International 230,318 1,574 231,892 Total $ 507,854 $ 135,449 $ 643,303 Six Months Ended June 28, 2020 GMS NSS Total United States $ 526,446 $ 292,014 $ 818,460 International 438,852 3,244 442,096 Total $ 965,298 $ 295,258 $ 1,260,556

Contract Assets and Contract _2

Contract Assets and Contract Liabilities (Tables)	6 Months Ended
	Jun. 27, 2021
Revenue from Contract with Customer [Abstract]
Components of Contract Assets and Contract Liabilities	Contract assets and contract liabilities consisted of the following as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 Contract assets $ 376,154 $ 360,552 Contract liabilities $ 88,903 $ 106,475

Accounts Receivable, net (Table

Accounts Receivable, net (Tables)	6 Months Ended
	Jun. 27, 2021
Receivables [Abstract]
Components of Accounts Receivable, Net	The components of accounts receivable, net consisted of the following as of the dates presented (in thousands): June 27, December 31, 2021 2020 Billed receivables $ 234,660 $ 227,787 Unbilled receivables 374,209 360,552 Less allowance for credit losses (3,809) (2,828) Total accounts receivables, net $ 605,060 $ 585,511

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, net (Tables)	6 Months Ended
	Jun. 27, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, net	The components of intangible assets, net consisted of the following as of the dates presented (in thousands): June 27, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 390,900 $ (172,534) $ 218,366 Technology 1,700 (1,700) — Trade name 24,800 (9,802) 14,998 Total $ 417,400 $ (184,036) $ 233,364 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships $ 390,900 $ (149,163) $ 241,737 Technology 1,700 (1,700) — Trade name 24,800 (8,327) 16,473 Total $ 417,400 $ (159,190) $ 258,210
Estimated Amortization Expense in Future Years	Estimated amortization expense in future years is expected to be: As of June 27, 2021 Remainder of 2021 $ 25,261 2022 50,089 2023 40,666 2024 33,782 2025 28,015 Thereafter 55,551 Total $ 233,364

Consolidated Ventures (Tables)

Consolidated Ventures (Tables)	6 Months Ended
	Jun. 27, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities	The cash flows generated by these VIEs are included within the Company’s condensed consolidated statements of cash flows. The condensed consolidated balance sheets include the following amounts from these consolidated VIEs as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 Assets Total assets $ 148,480 $ 145,664 Liabilities and equity Total liabilities $ 100,732 $ 96,318 Total equity 47,748 49,346 Total liabilities and equity $ 148,480 $ 145,664 The condensed consolidated statements of operations include the following amounts from consolidated VIEs for the periods presented ( in thousands ): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Income statements Revenues $ 111,486 $ 94,454 $ 203,013 $ 181,644 Cost of revenues 90,989 76,634 166,100 145,159 Selling, general and administrative expenses 18,793 15,864 36,291 33,881 Total operating expenses 109,783 92,498 202,391 179,040 Program (loss) income 1,703 1,956 622 2,604 Other (loss) income, net (395) 840 (619) (209) Net income $ 1,308 $ 2,796 $ 3 $ 2,395

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 27, 2021
Debt Disclosure [Abstract]
Long-term Debt	Long-term debt consisted of the following as of the dates presented ( in thousands ): June 27, December 31, 2021 2020 First Term Loan $ 887,775 $ 890,000 Other debt $ 5,024 $ — Total debt 892,799 890,000 Unamortized discount and debt issuance costs (22,295) (23,733) Total debt, net of discount and debt issuance costs 870,504 866,267 Less current maturities of long-term debt (6,611) (5,961) Total long-term debt, net of current $ 863,893 $ 860,306
Future Principal Maturities of Long-Term Debt	Future principal maturities of the Company’s long-term debt are summarized as follows ( in thousands ): As of June 27, 2021 Remainder of 2021 $ 7,067 2022 9,587 2023 9,607 2024 9,627 2025 9,648 Thereafter 847,263 Total $ 892,799

Net Income (loss) Per Share (Ta

Net Income (loss) Per Share (Tables)	6 Months Ended
	Jun. 27, 2021
Earnings Per Share [Abstract]
Computation of Basic and Diluted Income (Loss) Per Share	The following table sets forth the computation of basic and diluted income (loss) per share attributable to the Company’s common stockholders for the periods presented ( in thousands, except shares and per share amounts ): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Numerator: Net income (loss) attributed to PAE Incorporated $ 14,350 $ (3,446) $ 27,734 $ 22,538 Denominator: Basic weighted average shares 93,097,652 92,044,098 92,860,800 75,890,028 Diluted weighted average shares 95,511,269 92,787,379 95,193,549 76,273,931 Basic income (loss) per share $ 0.15 $ (0.04) $ 0.30 $ 0.30 Diluted income (loss) per share $ 0.15 $ (0.04) $ 0.29 $ 0.30

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 27, 2021
Leases [Abstract]
Future Minimum Operating Lease Payments	The Company’s future minimum operating lease payments for noncancelable operating leases were as follows ( in thousands ): June 27, 2021 Remainder of 2021 $ 24,623 2022 47,194 2023 42,678 2024 34,600 2025 28,185 Thereafter 61,793 Total future minimum lease payments 239,073 Less imputed interest 40,992 Present value of minimum lease payments 198,081 Less current maturities of lease liabilities 47,257 Long-term lease liabilities $ 150,824

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 27, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value Assumptions	The significant assumptions the Company used in the model are: Valuation Inputs June 27, 2021 December 31, 2020 Asset price $ 9.1 $ 9.2 Exercise price $ 11.5 $ 11.5 Contractual term 3.6 4.1 Volatility 50.0 % 50.0 % Risk-free rate of return 0.6 % 0.3 % Dividend yield — % — %
Schedule of Changes in Fair Value of Warrants	Details of the changes in fair value for the public warrants and private placement warrants are as follows: Public warrant liability June 27, 2021 Public warrant liability as of December 31 $ 30,667 Changes in fair value 399 Ending public warrant liability $ 31,066 Private warrant liability June 27, 2021 Private warrant liability as of December 31 $ 19,800 Changes in fair value (1,533) Ending private warrant liability $ 18,267

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 27, 2021
Segment Reporting [Abstract]
Information by Reportable Segment	The following table shows information by reportable segment for the periods presented (in thousands): Three Months Ended Six Months Ended June 27, June 28, June 27, June 28, 2021 2020 2021 2020 Revenues GMS $ 511,343 $ 507,854 $ 1,032,904 $ 965,298 NSS 235,855 135,449 462,861 295,258 Corporate — — — — Total revenues $ 747,198 $ 643,303 $ 1,495,765 $ 1,260,556 Operating income (loss) GMS $ 28,700 $ 31,537 $ 53,214 $ 44,140 NSS 9,248 7,725 20,638 12,092 Corporate (7,187) (4,967) (16,895) (14,479) Total operating income $ 30,761 $ 34,295 $ 56,957 $ 41,753 Amortization of intangible assets GMS $ 4,161 $ 4,115 $ 8,322 $ 8,231 NSS 8,470 3,932 16,524 7,863 Corporate — — — — Total amortization of intangible assets $ 12,631 $ 8,047 $ 24,846 $ 16,094

Description of Business (Detail

Description of Business (Details)	6 Months Ended
	Jun. 27, 2021segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	2

Revenues - Disaggregated Revenu

Revenues - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 747,198	$ 643,303	$ 1,495,765	$ 1,260,556
United States
Disaggregation of Revenue [Line Items]
Revenues	500,974	411,411	1,015,616	818,460
International
Disaggregation of Revenue [Line Items]
Revenues	246,224	231,892	480,149	442,096
Cost-reimbursable
Disaggregation of Revenue [Line Items]
Revenues	379,205	334,194	730,219	637,178
Fixed-price
Disaggregation of Revenue [Line Items]
Revenues	238,991	211,940	502,812	442,935
Time and materials
Disaggregation of Revenue [Line Items]
Revenues	129,002	97,169	262,734	180,443
GMS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	511,343	507,854	1,032,904	965,298
GMS | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	266,268	277,536	555,040	526,446
GMS | International | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	245,075	230,318	477,864	438,852
GMS | Cost-reimbursable | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	285,552	299,906	546,472	565,986
GMS | Fixed-price | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	159,955	158,247	341,259	320,285
GMS | Time and materials | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	65,836	49,701	145,173	79,027
NSS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	235,855	135,449	462,861	295,258
NSS | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	234,706	133,875	460,576	292,014
NSS | International | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	1,149	1,574	2,285	3,244
NSS | Cost-reimbursable | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	93,653	34,288	183,747	71,192
NSS | Fixed-price | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	79,036	53,693	161,553	122,650
NSS | Time and materials | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	63,166	47,468	117,561	101,416
DoD
Disaggregation of Revenue [Line Items]
Revenues	276,219	266,730	520,852	521,515
DoD | GMS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	194,598	204,634	357,031	392,240
DoD | NSS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	81,621	62,096	163,821	129,275
Other U.S. government agencies
Disaggregation of Revenue [Line Items]
Revenues	399,440	310,148	788,320	630,816
Other U.S. government agencies | GMS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	267,592	260,714	536,377	510,660
Other U.S. government agencies | NSS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	131,848	49,434	251,943	120,156
Commercial and non-U.S. customers
Disaggregation of Revenue [Line Items]
Revenues	71,539	66,425	186,593	108,225
Commercial and non-U.S. customers | GMS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	49,153	42,506	139,496	62,398
Commercial and non-U.S. customers | NSS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	$ 22,386	$ 23,919	$ 47,097	$ 45,827

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Millions	Jun. 27, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Remaining performance obligations balance	$ 1,497.4	$ 1,722
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-06-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue recognized (as a percent)	89.20%
Expected period of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-06-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue recognized (as a percent)	10.80%
Expected period of satisfaction	1 year

Contract Assets and Contract _3

Contract Assets and Contract Liabilities - Components of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract assets	$ 376,154	$ 360,552
Contract liabilities	$ 88,903	$ 106,475

Contract Assets and Contract _4

Contract Assets and Contract Liabilities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Revenue from Contract with Customer [Abstract]
Increase (decrease) in contract assets			$ 15.6
Increase (decrease) in contract liabilities			(17.6)
Recognition of contract liabilities	$ 3.4	$ 1.1	$ 87.9	$ 33.4

Business Combinations and Acq_2

Business Combinations and Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 23, 2020	Nov. 20, 2020	Feb. 11, 2020	Feb. 10, 2020	Jun. 27, 2021	Sep. 27, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Common stock par value (in dollars per share)					$ 0.0001		$ 0.0001
Goodwill					$ 593,171		$ 590,668
PE Shay Holdings, LLC
Business Acquisition [Line Items]
Post-closing adjustment payments						$ 20,200
PAE Management
Business Acquisition [Line Items]
Post-closing adjustment payments						$ 1,000
Class A Common Stock
Business Acquisition [Line Items]
Common stock par value (in dollars per share)					$ 0.0001
Shay Holding Corporation Merger
Business Acquisition [Line Items]
Aggregate cash consideration paid			$ 424,200
Transaction costs			$ 3,400
Shay Holding Corporation Merger | Earn-Out Shares
Business Acquisition [Line Items]
Period following completion of business combination (in years)			5 years	5 years
Shay Holding Corporation Merger | Additional Paid-in Capital
Business Acquisition [Line Items]
Acquisition fees and expenses			$ 18,200
Shay Holding Corporation Merger | Class A Common Stock
Business Acquisition [Line Items]
Consideration paid (in shares)			21,127,823
Shay Holding Corporation Merger | Class A Common Stock | Earn-Out Shares
Business Acquisition [Line Items]
Maximum additional earn-out (in shares)			4,000,000	4,000,000
CENTRA
Business Acquisition [Line Items]
Post-closing adjustment payments					$ 1,400
Outstanding capital stock acquired (as a percent)		100.00%
Business combination, consideration transferred		$ 225,300
Assets acquired		177,400
Liabilities assumed		77,200
Goodwill		126,400
Intangible assets acquired		$ 74,100
Metis Solution
Business Acquisition [Line Items]
Post-closing adjustment payments					$ 500
Outstanding capital stock acquired (as a percent)	100.00%
Business combination, consideration transferred	$ 95,700
Assets acquired	60,400
Liabilities assumed	20,700
Goodwill	56,500
Intangible assets acquired	$ 37,800

Accounts Receivable, net - Comp

Accounts Receivable, net - Components of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Receivables [Abstract]
Billed receivables	$ 234,660	$ 227,787
Unbilled receivables	374,209	360,552
Less allowance for credit losses	(3,809)	(2,828)
Total accounts receivables, net	$ 605,060	$ 585,511

Accounts Receivable, net - Narr

Accounts Receivable, net - Narrative (Details)	6 Months Ended
	Jun. 27, 2021
Accounts Receivable | U.S. Government Agencies | Customer Concentration Risk
Product Information [Line Items]
Concentration risk (as a percent)	93.60%

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, net - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 0	$ 0	$ 0	$ 0
Amortization of intangible assets	$ 12,631,000	$ 8,047,000	$ 24,846,000	$ 16,094,000
Customer relationships | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Useful life of finite-lived intangible assets (in years)			7 years 9 months 18 days
Trade name | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Useful life of finite-lived intangible assets (in years)			5 years 6 months

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, net - Intangible Assets, net (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 417,400	$ 417,400
Accumulated Amortization	(184,036)	(159,190)
Total	233,364	258,210
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	390,900	390,900
Accumulated Amortization	(172,534)	(149,163)
Total	218,366	241,737
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,700	1,700
Accumulated Amortization	(1,700)	(1,700)
Total	0	0
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,800	24,800
Accumulated Amortization	(9,802)	(8,327)
Total	$ 14,998	$ 16,473

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets, net - Estimated Amortization Expense in Future Years (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2021	$ 25,261
2022	50,089
2023	40,666
2024	33,782
2025	28,015
Thereafter	55,551
Total	$ 233,364	$ 258,210

Consolidated Ventures - Balance

Consolidated Ventures - Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Assets
Total assets	$ 1,856,445	$ 1,829,370
Liabilities and equity
Total liabilities	1,739,855	1,723,185
Total equity	82,877	73,949
Total liabilities and stockholders’ equity	1,856,445	1,829,370
Variable Interest Entity, Primary Beneficiary
Assets
Total assets	148,480	145,664
Liabilities and equity
Total liabilities	100,732	96,318
Total equity	47,748	49,346
Total liabilities and stockholders’ equity	$ 148,480	$ 145,664

Consolidated Ventures - Stateme

Consolidated Ventures - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Variable Interest Entity [Line Items]
Revenues	$ 747,198	$ 643,303	$ 1,495,765	$ 1,260,556
Cost of revenues	564,952	496,678	1,131,618	961,886
Selling, general and administrative expenses	142,776	105,451	288,067	242,777
Total operating expenses	720,359	610,176	1,444,531	1,220,757
Program profit	26,839	33,127	51,234	39,799
Other (loss) income, net	3,922	1,168	5,723	1,954
Net income (loss) attributed to PAE Incorporated	14,350	(3,446)	27,734	22,538
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Revenues	111,486	94,454	203,013	181,644
Cost of revenues	90,989	76,634	166,100	145,159
Selling, general and administrative expenses	18,793	15,864	36,291	33,881
Total operating expenses	109,783	92,498	202,391	179,040
Program profit	1,703	1,956	622	2,604
Other (loss) income, net	(395)	840	(619)	(209)
Net income (loss) attributed to PAE Incorporated	$ 1,308	$ 2,796	$ 3	$ 2,395

Consolidated Ventures - Narrati

Consolidated Ventures - Narrative (Details) - Parsons Government Services, Inc. $ in Millions	Jan. 31, 2021USD ($)
Variable Interest Entity [Line Items]
Minority interest (as a percent)	49.00%
Payments to acquire equity method investments	$ 15.8
Ownership percentage (as a percent)	100.00%

Debt - Long-Term Debt (Details)

Debt - Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 892,799	$ 890,000
Other debt	5,024	0
Unamortized discount and debt issuance costs	(22,295)	(23,733)
Total debt, net of discount and debt issuance costs	870,504	866,267
Less current maturities of long-term debt	(6,611)	(5,961)
Total long-term debt, net of current	863,893	860,306
Secured Debt | First Term Loan
Debt Instrument [Line Items]
Total debt	$ 887,775	$ 890,000

Debt - Narrative (Details)

Debt - Narrative (Details)	Oct. 19, 2020USD ($)	Oct. 20, 2016	Jun. 27, 2021USD ($)letter_of_creditloan	Dec. 31, 2020USD ($)letter_of_credit
Debt Instrument [Line Items]
Number of letters of credit outstanding | letter_of_credit			10	13
Letters of credit outstanding, amount			$ 23,400,000	$ 23,900,000
London Interbank Offered Rate (LIBOR) | Addition to LIBO Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.00%
Base Rate | Variable Rate Component One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.80%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.30%
First Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 890,000,000
Debt instrument, interest rate during period (as a percent)			5.30%	5.30%
First Term Loan | London Interbank Offered Rate (LIBOR) | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		3.50%
First Term Loan | Base Rate | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		4.50%
Term Loan Facility Maturing October 2027 | Secured Debt
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 740,000,000
Term Loan Facility Maturing October 2027 | Secured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.50%
Delayed Draw Term Loan Facility Maturing October 2027 | Secured Debt
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 150,000,000
Delayed Draw Term Loan Facility Maturing October 2027 | Secured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.50%
Delayed Draw Term Loan Facility Maturing October 2027 | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 175,000,000
Equipment Loan
Debt Instrument [Line Items]
Debt instrument, face amount			$ 5,000,000
Number of equipment loans | loan			1
Interest rate (as a percent)			2.80%
Revolving Credit Facility | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Remaining borrowing capacity			$ 151,600,000	$ 132,800,000
Applicable interest rate (as a percent)			4.00%	4.00%
Revolving Credit Facility | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.80%
Revolving Credit Facility | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.30%
Revolving Credit Facility | Revolving Credit Facility | Base Rate | Minimum | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.80%
Revolving Credit Facility | Revolving Credit Facility | Base Rate | Maximum | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.30%

Debt - Future Principal Maturit

Debt - Future Principal Maturities of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Long-term Debt, Fiscal Year Maturity [Abstract]
Remainder of 2021	$ 7,067
2022	9,587
2023	9,607
2024	9,627
2025	9,648
Thereafter	847,263
Total	$ 892,799	$ 890,000

Stockholders' Equity (Details)

Stockholders' Equity (Details) - $ / shares	Feb. 11, 2020	Feb. 10, 2020	Jun. 27, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capital stock authorized (in shares)			211,000,000
Common stock par value (in dollars per share)			$ 0.0001	$ 0.0001
Preferred stock par value (in dollars per share)			$ 0.0001	$ 0.0001
Common stock authorized (in shares)			210,000,000	210,000,000
Preferred stock authorized (in shares)			1,000,000	1,000,000
Shay Holding Corporation Merger | Earn-Out Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period following completion of business combination (in years)	5 years	5 years
Shay Holding Corporation Merger | Earn-Out Shares, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum additional earn-out (in shares)			1,000,000
Share price threshold (in dollars per share)			$ 13
Shay Holding Corporation Merger | Earn-Out Shares, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum additional earn-out (in shares)			1,000,000
Share price threshold (in dollars per share)			$ 15.50
Shay Holding Corporation Merger | Earn-Out Shares, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum additional earn-out (in shares)			1,000,000
Share price threshold (in dollars per share)			$ 18
Shay Holding Corporation Merger | Earn-Out Shares, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum additional earn-out (in shares)			1,000,000
Share price threshold (in dollars per share)			$ 20.50
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock par value (in dollars per share)			$ 0.0001
Class A Common Stock | Shay Holding Corporation Merger | Earn-Out Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum additional earn-out (in shares)	4,000,000	4,000,000
Minimum threshold trading days			10 days
Consecutive trading days			20 days

Net Income (loss) Per Share - C

Net Income (loss) Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Numerator:
Net income (loss) attributed to PAE Incorporated	$ 14,350	$ (3,446)	$ 27,734	$ 22,538
Denominator:
Basic weighted average shares (in shares)	93,097,652	92,044,098	92,860,800	75,890,028
Diluted weighted average shares (in shares)	95,511,269	92,787,379	95,193,549	76,273,931
Basic income (loss) per share (in dollars per share)	$ 0.15	$ (0.04)	$ 0.30	$ 0.30
Diluted income (loss) per share (in dollars per share)	$ 0.15	$ (0.04)	$ 0.29	$ 0.30

Net Income (loss) Per Share - N

Net Income (loss) Per Share - Narrative (Details) - shares	3 Months Ended	6 Months Ended
	Jun. 27, 2021	Jun. 27, 2021
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted income (loss) per share (in shares)	19,999,985	19,999,985
Earn-Out Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted income (loss) per share (in shares)	4,000,000	4,000,000

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 27, 2021	Jun. 27, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets, net	$ 195,245	$ 195,245	$ 191,370
Operating lease liabilities	198,081	198,081
Operating lease cost	$ 15,200	$ 30,800
Weighted average remaining lease term (in years)	6 years 6 months	6 years 6 months
Weighted average discount rate (as a percent)	6.10%	6.10%
Cash payments for operating leases	$ 12,200	$ 24,200

Leases - Future Minimum Operati

Leases - Future Minimum Operating Lease Payments (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remainder of 2021	$ 24,623
2022	47,194
2023	42,678
2024	34,600
2025	28,185
Thereafter	61,793
Total future minimum lease payments	239,073
Less imputed interest	40,992
Present value of minimum lease payments	198,081
Less current maturities of lease liabilities	47,257	$ 46,756
Long-term lease liabilities	$ 150,824

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value Assumptions (Details)	Jun. 27, 2021$ / shares	Dec. 31, 2020$ / shares
Asset price
Class of Warrant or Right [Line Items]
Warrant liability, measurement input	9.1	9.2
Exercise price
Class of Warrant or Right [Line Items]
Warrant liability, measurement input	11.5	11.5
Contractual term
Class of Warrant or Right [Line Items]
Warrant, term	3 years 7 months 6 days	4 years 1 month 6 days
Volatility
Class of Warrant or Right [Line Items]
Warrant liability, measurement input	0.500	0.500
Risk-free rate of return
Class of Warrant or Right [Line Items]
Warrant liability, measurement input	0.006	0.003
Dividend yield
Class of Warrant or Right [Line Items]
Warrant liability, measurement input	0	0

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Changes in Fair Value of Warrants (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	$ 50,467
Changes in fair value	1,133	$ 14,132
Ending balance	49,333
Public Warrants
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	30,667
Changes in fair value	399
Ending balance	31,066
Private Placement
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	19,800
Changes in fair value	(1,533)
Ending balance	$ 18,267

Segment Reporting - Information

Segment Reporting - Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Segment Reporting Information [Line Items]
Revenues	$ 747,198	$ 643,303	$ 1,495,765	$ 1,260,556
Operating income (loss)	30,761	34,295	56,957	41,753
Amortization of intangible assets	12,631	8,047	24,846	16,094
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating income (loss)	(7,187)	(4,967)	(16,895)	(14,479)
Amortization of intangible assets	0	0	0	0
GMS | Operating Segments
Segment Reporting Information [Line Items]
Revenues	511,343	507,854	1,032,904	965,298
Operating income (loss)	28,700	31,537	53,214	44,140
Amortization of intangible assets	4,161	4,115	8,322	8,231
NSS | Operating Segments
Segment Reporting Information [Line Items]
Revenues	235,855	135,449	462,861	295,258
Operating income (loss)	9,248	7,725	20,638	12,092
Amortization of intangible assets	$ 8,470	$ 3,932	$ 16,524	$ 7,863

Related-Party Transactions (Det

Related-Party Transactions (Details) - USD ($)	Feb. 10, 2020	Jun. 27, 2021	Jun. 28, 2020
PE Shay Holdings, LLC
Related Party Transaction [Line Items]
Liability for estimated payment to platinum stockholder		$ 4,700,000
Affiliated Entity | Advisory Services
Related Party Transaction [Line Items]
Related party transaction expenses	$ 15,000,000	$ 0	$ 15,800,000
Affiliated Entity | Advisory Services | Selling, General and Administrative Expenses
Related Party Transaction [Line Items]
Related party transaction expenses	$ 800,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020	Mar. 27, 2020
Income Tax Disclosure [Abstract]
Expense (benefit) from income taxes	$ 2,626	$ 3,752	$ 5,235	$ (5,776)
Effective income tax rate (as a percent)	15.00%	350.30%	16.10%	(32.60%)
Payroll tax funding deferral					$ 37,000