Entity Central Index Key
Business combination recognized identifiable assets acquired and liabilities assumed operating leases right of use assets.
Business combination recognized identifiable assets acquired and liabilities assumed intangible and other assets.
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accrued expenses and other liabilities.
Business combination recognized identifiable assets acquired and liabilities assumed operating leases short-term lease liabilities.
Business combination recognized identifiable assets acquired and liabilities assumed income tax payable.
Business combination recognized identifiable assets acquired and liabilities assumed operating leases long-term lease liabilities.
Income tax reconciliation transaction costs.
Long-term employee incentives.
Adjusted EBITDA attributable to parent.
Adjusted EBITDA attributable to noncontrolling interests.
Litigation claim settlement related expense (income).
Sale leaseback transaction amortization of deferred gain.
Transaction related costs.
Other reconciliation from net income to adjusted EBITDA.
Cover [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Current Reporting Status
Entity Current Reporting Status
Entity Interactive Data Current
Entity Interactive Data Current
Entity Well-known Seasoned Issuer
Entity Well Known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Entity Public Float
Entity Public Float
Entity Shell Company
Entity Shell Company
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity File Number
Entity File Number
Entity Incorporation, State or Country Code
Entity Incorporation State Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address Address Line1
Entity Address, City or Town
Entity Address City Or Town
Entity Address, State or Province
Entity Address State Or Province
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Document Annual Report
Document Annual Report
Document Transition Report
Document Transition Report
ICFR Auditor Attestation Flag
Icfr Auditor Attestation Flag
Title of each class
Security12b Title
Trading Symbol(s)
Trading Symbol
Name of each exchange on which registered
Security Exchange Name
Accrued expenses and other current liabilities.
Statement Of Financial Position [Abstract]
Assets
Assets [Abstract]
Current assets:
Assets Current [Abstract]
Cash and cash equivalents (including $75,220 and $51,171 Cash of consolidated joint ventures)
Cash And Cash Equivalents At Carrying Value
Restricted cash and investments
Restricted Cash And Investments Current
Accounts receivable, net (including $190,643 and $166,355 Accounts receivable of consolidated joint ventures, net)
Accounts Receivable Net Current
Contract assets (including $23,498 and $26,458 Contract assets of consolidated joint ventures)
Contract With Customer Asset Net Current
Prepaid expenses and other current assets (including $3,045 and $11,182 Prepaid expenses and other current assets of consolidated joint ventures)
Prepaid Expense And Other Assets Current
Total current assets
Assets Current
Property and equipment, net (including $2,629 and $2,945 Property and equipment of consolidated joint ventures, net)
Property Plant And Equipment Net
Right of use assets, operating leases
Operating Lease Right Of Use Asset
Goodwill
Goodwill
Investments in and advances to unconsolidated joint ventures
Investments In Affiliates Subsidiaries Associates And Joint Ventures
Intangible assets, net
Intangible Assets Net Excluding Goodwill
Deferred tax assets
Deferred Income Tax Assets Net
Other noncurrent assets
Other Assets Noncurrent
Total assets
Assets
Liabilities and Shareholders' Equity
Liabilities And Stockholders Equity [Abstract]
Current liabilities:
Liabilities Current [Abstract]
Accounts payable (including $97,810 and $85,869 Accounts payable of consolidated joint ventures)
Accounts Payable Current
Accrued expenses and other current liabilities (including $68,801 and $74,857 Accrued expenses and other current liabilities of consolidated joint ventures)
Accrued Expenses And Other Current Liabilities
Contract liabilities (including $33,922 and $32,638 Contract liabilities of consolidated joint ventures)
Contract With Customer Liability Current
Short-term lease liabilities, operating leases
Operating Lease Liability Current
Income taxes payable
Taxes Payable Current
Short-term debt
Long Term Debt Current
Total current liabilities
Liabilities Current
Long-term employee incentives
Long Term Employee Incentives
Long-term debt
Long Term Debt Noncurrent
Long-term lease liabilities, operating leases
Operating Lease Liability Noncurrent
Deferred tax liabilities
Deferred Income Tax Liabilities Net
Other long-term liabilities
Other Liabilities Noncurrent
Total liabilities
Liabilities
Contingencies (Note 15)
Commitments And Contingencies
Shareholders' equity:
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Common stock, $1 par value; authorized 1,000,000,000 shares; 146,609,288 and 146,440,701 shares issued; 25,719,350 and 21,772,888 public shares outstanding; 76,641,312 and 78,896,806 ESOP shares outstanding
Common Stock Value
Treasury stock, 44,248,626 shares at cost
Treasury Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Accumulated deficit
Retained Earnings Accumulated Deficit
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income Loss Net Of Tax
Total Parsons Corporation shareholders' equity
Stockholders Equity
Noncontrolling interests
Minority Interest
Total shareholders' equity
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
Total liabilities and shareholders' equity
Liabilities And Stockholders Equity
Statement [Table]
Statement [Table]
Related Party
Related Party Transactions By Related Party [Axis]
Related Party
Related Party [Domain]
Consolidated joint ventures.
Consolidated Joint Ventures
Consolidated Joint Ventures [Member]
Plan Name
Plan Name [Axis]
Plan Name
Plan Name [Domain]
Employee Stock Ownership Plan.
ESOP
Employee Stock Ownership Plan [Member]
Statement [Line Items]
Statement [Line Items]
Cash and cash equivalents
Accounts receivable, net
Contract assets
Prepaid expenses and other current assets
Property and equipment, net
Accounts payable
Accrued expenses and other current liabilities
Contract liabilities
Common stock, par value
Common Stock Par Or Stated Value Per Share
Common stock, shares authorized
Common Stock Shares Authorized
Common stock, shares, issued
Common Stock Shares Issued
Common stock, shares, outstanding
Common Stock Shares Outstanding
Treasury stock, shares
Treasury Stock Shares
Gain (loss) on long-term contract.
Other income (expense).
Income Statement [Abstract]
Revenue
Revenue From Contract With Customer Excluding Assessed Tax
Direct cost of contracts
Cost Of Goods And Services Sold
Equity in earnings of unconsolidated joint ventures
Income Loss From Equity Method Investments
Indirect, general and administrative expenses
General And Administrative Expense
Operating income
Operating Income Loss
Interest income
Investment Income Interest
Interest expense
Interest Expense
Other income (expense), net
Other Nonoperating Income Expense
Gain associated with claim on long-term contract
Gain Loss On Long Term Contract
Total other (expense) income
Other Income Expense
Income before income tax expense
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
Income tax (expense) benefit
Income Tax Expense Benefit
Net income including noncontrolling interests
Profit Loss
Net income attributable to noncontrolling interests
Net Income Loss Attributable To Noncontrolling Interest
Net income attributable to Parsons Corporation
Net Income Loss
Earnings per share:
Earnings Per Share [Abstract]
Basic earnings per share
Earnings Per Share Basic
Diluted earnings per share
Earnings Per Share Diluted
Statement Of Income And Comprehensive Income [Abstract]
Net income including noncontrolling interests
Other comprehensive income (loss), net of tax
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Foreign currency translation adjustment, net of tax
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
Pension adjustments, net of tax
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
Comprehensive income including noncontrolling interests, net of tax
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Comprehensive income attributable to noncontrolling interests, net of tax
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
Comprehensive income attributable to Parsons Corporation, net of tax
Comprehensive Income Net Of Tax
Temporary equity purchase of treasury stock.
Temporary equity contributions of treasury stock to ESOP.
Minority interest increase (decrease) from contributions to noncontrolling interest holders.
Temporary stock redeemed or called during period value.
Temporary equity stock issued during period value conversion of units.
Adjustments to additional paid in capital purchase of convertible note hedge.
Statement Of Stockholders Equity [Abstract]
Total Parsons Equity (Deficit)
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Redeemable common stock.
Redeemable Common Stock
Redeemable Common Stock [Member]
Common Stock
Common Stock [Member]
Treasury Stock
Treasury Stock [Member]
Accumulated Deficit
Retained Earnings [Member]
Additional Paid-in Capital
Additional Paid In Capital [Member]
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income [Member]
Total Parsons Equity (Deficit)
Parent [Member]
Noncontrolling Interest
Noncontrolling Interest [Member]
Revision of Prior Period
Restatement [Axis]
Revision of Prior Period
Restatement [Domain]
Revision of Prior Period, Accounting Standards Update, Adjustment
Revision Of Prior Period Accounting Standards Update Adjustment [Member]
Accounting Standards Update
Adjustments For New Accounting Pronouncements [Axis]
Accounting Standards Update
Type Of Adoption [Member]
ASC 606
Accounting Standards Update201409 [Member]
ASC 842
Accounting Standards Update201602 [Member]
ASC 2016-13
Accounting Standards Update201613 [Member]
Sale of Stock
Subsidiary Sale Of Stock [Axis]
Sale of Stock
Sale Of Stock Name Of Transaction [Domain]
IPO
I P O [Member]
Beginning balance
Beginning balance, Temporary Equity
Temporary Equity Carrying Amount Attributable To Parent
Comprehensive income (loss)
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest [Abstract]
Net (loss) income
Foreign currency translation (loss) gain
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax
Pension adjustments, net
Purchase of treasury stock
Treasury Stock Value Acquired Cost Method
Temporary equity, Purchase of treasury stock
Temporary Equity Purchase Of Treasury Stock
Contributions of treasury stock to ESOP
Stock Issued During Period Value Employee Stock Ownership Plan
Temporary equity, Contributions of treasury stock to ESOP
Temporary Equity Contributions Of Treasury Stock To E S O P
Contributions
Minority Interest Increase Decrease From Contributions To Noncontrolling Interest Holders
Distributions
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
Dividend paid
Dividends
ESOP shares at redemption value
Stock Redeemed Or Called During Period Value
Temporary equity, ESOP shares at redemption value
Temporary Stock Redeemed Or Called During Period Value
Stock-based compensation
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
Issuance of equity securities, net of retirements/ IPO proceeds, net
Stock Issued During Period Value New Issues
Conversion of S-Corp to C-Corp
Stock Issued During Period Value Conversion Of Units
Temporary equity, Conversion of S-Corp to C-Corp
Temporary Equity Stock Issued During Period Value Conversion Of Units
Temporary to permanent equity end of lock-up period
Reclassifications Of Temporary To Permanent Equity
Equity component value of convertible note issuance
Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt
Purchase of convertible note hedge
Adjustments To Additional Paid In Capital Purchase Of Convertible Note Hedge
Sale of common stock warrants
Adjustments To Additional Paid In Capital Warrant Issued
Ending Balance
Ending Balance, Temporary Equity
Amortization of deferred gains.
Amortization of convertible notes discount.
Increase (decrease) in accrued expenses and other current liabilities.
Increase (decrease) in billings in excess of costs.
Increase (decrease) in provision for contract losses.
Payment of convertible notes issuance transaction costs.
Payments for purchase of treasury stock.
Payments for taxes paid on vested stock.
Statement Of Cash Flows [Abstract]
Cash flows from operating activities
Net Cash Provided By Used In Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Depreciation and amortization
Depreciation And Amortization
Amortization of deferred gain
Amortization Of Deferred Gains
Amortization of debt issue costs
Amortization Of Financing Costs
Amortization of convertible notes discount
Amortization Of Convertible Notes Discount
Gain associated with claim on long-term contract
Gain Loss Related To Litigation Settlement
Loss on disposal of property and equipment
Gain Loss On Sale Of Property Plant Equipment
Provision for doubtful accounts
Provision For Doubtful Accounts
Deferred taxes
Deferred Income Tax Expense Benefit
Foreign currency transaction gains and losses
Foreign Currency Transaction Gain Loss Before Tax
Equity in earnings of unconsolidated joint ventures
Return on investments in unconsolidated joint ventures
Equity Method Investment Dividends Or Distributions
Stock-based compensation
Share Based Compensation
Contributions of treasury stock
Other Postretirement Benefits Expense Reversal Of Expense Noncash
Changes in assets and liabilities, net of acquisitions and newly consolidated joint ventures
Increase Decrease In Operating Capital [Abstract]
Accounts receivable
Increase Decrease In Accounts Receivable
Contract assets
Increase Decrease In Contract With Customer Asset
Prepaid expenses and other assets
Increase Decrease In Prepaid Deferred Expense And Other Assets
Accounts payable
Increase Decrease In Accounts Payable
Accrued expenses and other current liabilities
Increase Decrease In Accrued Expenses And Other Current Liabilities
Billings in excess of costs
Increase Decrease In Billings In Excess Of Costs
Contract liabilities
Increase Decrease In Contract With Customer Liability
Provision for contract losses
Increase Decrease In Provision For Contract Losses
Income taxes
Increase Decrease In Income Taxes
Other long-term liabilities
Increase Decrease In Other Noncurrent Liabilities
Net cash provided by operating activities
Net Cash Provided By Used In Operating Activities
Cash flows from investing activities
Net Cash Provided By Used In Investing Activities [Abstract]
Capital expenditures
Payments To Acquire Productive Assets
Proceeds from sale of property and equipment
Proceeds From Sale Of Property Plant And Equipment
Payments for acquisitions, net of cash acquired
Payments To Acquire Businesses Net Of Cash Acquired
Investments in unconsolidated joint ventures
Payments To Acquire Interest In Joint Venture
Return of investments in unconsolidated joint ventures
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital
Net cash used in investing activities
Net Cash Provided By Used In Investing Activities
Cash flows from financing activities
Net Cash Provided By Used In Financing Activities [Abstract]
Proceeds from borrowings
Proceeds From Lines Of Credit
Repayments of borrowings
Repayments Of Lines Of Credit
Payments for debt costs and credit agreement
Payments Of Debt Issuance Costs
Proceeds from issuance of convertible notes
Proceeds From Convertible Debt
Payments for purchase of bond hedges
Payments For Hedge Financing Activities
Proceeds from issuance of warrants
Proceeds From Issuance Of Warrants
Transaction costs paid in connection with convertible notes issuance
Payment Of Convertible Notes Issuance Transaction Costs
Contributions by noncontrolling interests
Proceeds From Minority Shareholders
Distributions to noncontrolling interests
Payments To Minority Shareholders
Purchase of treasury stock
Payments For Purchase Of Treasury Stock
Taxes paid on vested stock
Payments For Taxes Paid On Vested Stock
Proceeds from issuance of common stock
Proceeds From Issuance Of Common Stock
Dividend paid
Payments Of Dividends
Net cash provided by financing activities
Net Cash Provided By Used In Financing Activities
Effect of exchange rate changes
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Disposal Group Including Discontinued Operations
Net increase (decrease) in cash, cash equivalents and restricted cash
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash, cash equivalents and restricted cash
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect [Abstract]
Beginning of year
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
End of year
Cash paid during the year for
Supplemental Cash Flow Information [Abstract]
Interest
Interest Paid Net
Income taxes (net of refunds)
Income Taxes Paid Net
Documents Incorporated by Reference
Documents Incorporated By Reference [Text Block]
Description of operations disclosure.
Description Of Operations Disclosure [Abstract]
Description of Operations
Nature Of Operations
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Summary of Significant Accounting Policies
Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]
Business Combinations [Abstract]
Acquisitions
Business Combination Disclosure [Text Block]
Revenue From Contract With Customer [Abstract]
Contracts with Customers
Revenue From Contract With Customer [Text Block]
Leases [Abstract]
Leases
Leases Of Lessee Disclosure [Text Block]
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity-Based Compensation
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill
Goodwill Disclosure [Text Block]
Intangible Assets
Intangible Assets Disclosure [Text Block]
Property Plant And Equipment [Abstract]
Property and Equipment, Net
Property Plant And Equipment Disclosure [Text Block]
Sale-Leasebacks
Sale Leaseback Transaction Disclosure [Text Block]
Payables And Accruals [Abstract]
Accrued Expenses and Other Current Liabilities
Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block]
Debt Disclosure [Abstract]
Debt and Credit Facilities
Debt Disclosure [Text Block]
Other Liabilities Disclosure [Abstract]
Other Long-term Liabilities
Other Liabilities Disclosure [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Contingencies
Commitments And Contingencies Disclosure [Text Block]
Compensation And Retirement Disclosure [Abstract]
Retirement and Other Benefit Plans
Compensation And Employee Benefit Plans [Text Block]
Equity Method Investments And Joint Ventures [Abstract]
Investments in and Advances to Joint Ventures
Equity Method Investments Disclosure [Text Block]
Related Party Transactions [Abstract]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments
Fair Value Disclosures [Text Block]
Earnings Per Share
Earnings Per Share [Text Block]
Segment Reporting [Abstract]
Segments Information
Segment Reporting Disclosure [Text Block]
Quarterly Financial Information Disclosure [Abstract]
Quarterly Information - Unaudited
Quarterly Financial Information [Text Block]
Subsequent Events [Abstract]
Subsequent Events
Subsequent Events [Text Block]
Valuation And Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]
Basis of Presentation and Principles of Consolidation
Basis Of Accounting Policy Policy [Text Block]
Use of Estimates
Use Of Estimates
ESOP
Employee Stock Ownership Plan E S O P Policy
Treasury stock.
Treasury Stock
Treasury Stock Policy Policy [Text Block]
Earnings per Share
Earnings Per Share Policy [Text Block]
Revenue Recognition
Revenue Recognition Policy [Text Block]
Cash Equivalents
Cash And Cash Equivalents Policy [Text Block]
Restricted cash and investments.
Restricted Cash and Investments
Restricted Cash And Investments Policy Policy [Text Block]
Accounts Receivable, Net
Receivables Policy [Text Block]
Contract Assets and Contract Liabilities
Revenue From Contract With Customer Policy [Text Block]
Concentration of Credit Risk
Concentration Risk Credit Risk
Property and Equipment
Property Plant And Equipment Policy [Text Block]
Leases
Lessee Leases Policy [Text Block]
Equity-Based Compensation
Compensation Related Costs Policy [Text Block]
Business Combinations
Business Combinations Policy
Consolidation of joint venture and variable interest entity.
Consolidation Of Joint Venture And Variable Interest Entity
Consolidation Of Joint Venture And Variable Interest Entity Policy Policy [Text Block]
Goodwill
Goodwill And Intangible Assets Goodwill Policy
Intangible Assets
Intangible Assets Finite Lived Policy
Income Taxes
Income Tax Policy [Text Block]
Foreign Currency Translation
Foreign Currency Transactions And Translations Policy [Text Block]
Self-Insurance
Self Insurance Reserve Policy [Text Block]
Recently Adopted Accounting Pronouncements
New Accounting Pronouncements Policy Policy [Text Block]
Business Acquisition
Business Acquisition [Axis]
Business Acquisition, Acquiree
Business Acquisition Acquiree [Domain]
Polaris Alpha.
Polaris Alpha
Polaris Alpha [Member]
OGSystems.
OGSystems
O G Systems [Member]
QRC Technologies.
QRC Technologies
Q R C Technologies [Member]
Braxton Science & Technology Group.
Braxton Science & Technology Group
Braxton Science Technology Group [Member]
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed on Preliminary Purchase Price Allocation
Schedule Of Recognized Identified Assets Acquired And Liabilities Assumed Table [Text Block]
Schedule of Intangible Assets Value on Purchase Price
Schedule Of Finite Lived Intangible Assets Acquired As Part Of Business Combination [Text Block]
Schedule of Supplemental Pro Forma Information
Business Acquisition Pro Forma Information [Text Block]
Summary of Disaggregation of Revenue
Disaggregation Of Revenue Table [Text Block]
Summary of Contract Assets and Contract Liabilities
Contract With Customer Asset And Liability Table [Text Block]
Summary of changes in contract assets and contract liabilities.
Summary of Changes in Contract Assets and Contract Liabilities
Summary Of Changes In Contract Assets And Contract Liabilities Table [Text Block]
Summary of changes in revenues.
Summary of Changes in Revenue
Summary Of Changes In Revenues Table [Text Block]
Summary of Accounts Receivable, Net
Schedule Of Accounts Notes Loans And Financing Receivable [Text Block]
Summary of Remaining Unsatisfied Performance Obligations Expect to Satisfy
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Table [Text Block]
Summary of Lease Costs
Lease Cost Table [Text Block]
Schedule of cash flow information related to leases.
Schedule of Supplemental Cash Flow Information Related to Leases
Schedule Of Cash Flow Information Related To Leases Table [Text Block]
Schedule of balance sheet information related to leases.
Schedule of Supplemental Balance Sheet and Other Information Related to Leases
Schedule Of Balance Sheet Information Related To Leases Table [Text Block]
Schedule of maturities of operating and finance lease liabilities.
Schedule of Maturity Analysis of Future Undiscounted Cash Flows
Schedule Of Maturities Of Operating And Finance Lease Liabilities Table [Text Block]
Award Type
Award Type [Axis]
Award Type
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
Stock Appreciation Rights
Stock Appreciation Rights S A R S [Member]
Long-term growth units.
Long-Term Growth Units
Long Term Growth Units [Member]
Restricted Award Units
Restricted Stock [Member]
Restricted Stock Units
Restricted Stock Units R S U [Member]
Summary of Stock Issuance Activity
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity Table [Text Block]
Summary of Stock Appreciation Right Activity
Schedule Of Share Based Compensation Stock Appreciation Rights Award Activity Table [Text Block]
Schedule of Unvested Share Activity
Schedule Of Nonvested Share Activity Table [Text Block]
Summary of Restricted Stock Unit Activity
Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block]
Schedule of amount paid for cash settled awards.
Schedule of Amount Paid for Cash Settled Awards by Award Type
Schedule Of Amount Paid For Cash Settled Awards Table [Text Block]
Schedule of share based compensation restricted stock outstanding activity.
Summary of Restricted Stock Outstanding
Schedule Of Share Based Compensation Restricted Stock Outstanding Activity Table [Text Block]
Summary of Changes in Carrying Value of Goodwill by Reporting Segment
Schedule Of Goodwill [Text Block]
Schedule of Gross Amount and Accumulated Amortization of Intangible Assets
Schedule Of Acquired Finite Lived Intangible Assets By Major Class [Text Block]
Schedule of Estimated Amortization Expense
Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block]
Schedule of Property and Equipment, Net
Property Plant And Equipment [Text Block]
Schedule of Accrued Expenses and Other Current Liabilities
Schedule Of Accounts Payable And Accrued Liabilities Table [Text Block]
Schedule of Long Term Debt
Schedule Of Debt Table [Text Block]
Schedule of aggregate amount debt repayable.
Schedule of Aggregate Amount of Debt
Schedule Of Aggregate Amount Debt Repayable Table [Text Block]
Summary of Convertible Senior Notes
Convertible Debt Table [Text Block]
Schedule of Other Long-term Liabilities
Other Noncurrent Liabilities Table [Text Block]
Components of Income from Continuing Operations Before Income Taxes
Schedule Of Income Before Income Tax Domestic And Foreign Table [Text Block]
Schedule of Income Tax Expense (Benefit) Attributable to Income from Continuing Operations
Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]
Computation of Income Tax Expense (Benefit)
Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]
Components of Deferred Tax Assets and Liabilities
Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]
Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits
Schedule Of Unrecognized Tax Benefits Roll Forward Table [Text Block]
Schedule of financial information of consolidated joint ventures.
Schedule of Financial Information of Consolidated Joint Ventures
Schedule Of Financial Information Of Consolidated Joint Ventures Table [Text Block]
Summary of Financial Information for Unconsolidated Joint Ventures
Equity Method Investments [Text Block]
Summary of fair value assets associated with pension plan.
Summary of Fair Value Assets Associated with Pension Plan
Summary Of Fair Value Assets Associated With Pension Plan Table [Text Block]
Schedule of fair value of redeemable common stock associated employee stock ownership plan.
Schedule of Fair Value of Redeemable Common Stock Associated Employee Stock Ownership Plan
Schedule Of Fair Value Of Redeemable Common Stock Associated Employee Stock Ownership Plan Table [Text Block]
Schedule of Reconciliation Fair Value Measurements Using Significant Unobservable Inputs
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]
Schedule of Weighted Average Number of Shares Used To Compute Basic and Diluted EPS
Schedule Of Weighted Average Number Of Shares Table [Text Block]
Net Income Available to Shareholders to Compute Basic and Diluted EPS
Schedule Of Earnings Per Share Diluted By Common Class [Text Block]
Summary of Business Segment Information
Schedule Of Segment Reporting Information By Segment [Text Block]
Summary of Adjusted EBITDA Business Segment Information
Reconciliation Of Operating Profit Loss From Segments To Consolidated [Text Block]
Summary of revenues and property and equipment, net by geographic area.
Summary of Revenues and Property and Equipment, Net by Geographic Area
Summary Of Revenues And Property And Equipment Net By Geographic Area Table [Text Block]
Summary of Revenues by Business Lines
Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Text Block]
Schedule of Selected Quarterly Financial Information
Schedule Of Quarterly Financial Information Table [Text Block]
Purchase of additional shares upon exercise of options.
Underwriting discount per share.
Funds to dividends through public offering.
Repayment on term loan through public offering.
Description of operations disclosure.
Description of operations disclosure.
Description Of Operations Disclosure [Table]
Description Of Operations Disclosure [Table]
Underwriters
Over Allotment Option [Member]
Description Of Operations Disclosure [Line Items]
Description Of Operations Disclosure [Line Items]
Common stock shares sold
Stock Issued During Period Shares New Issues
Common stock sold per share
Sale Of Stock Price Per Share
Purchase of additional shares upon exercise of options
Purchase Of Additional Shares Upon Exercise Of Options
Share price
Share Price
Underwriting discount per share
Underwriting Discount Per Share
Proceeds from IPO
Proceeds From Issuance Initial Public Offering
Funds to dividend through public offering
Funds To Dividends Through Public Offering
Repayment on term loan through public offering
Repayment On Term Loan Through Public Offering
Common stock dividend ratio.
Dividend payable payment date.
Common stock dividend ratio
Common Stock Dividend Ratio
Dividends declared date
Dividends Payable Date Declared Day Month And Year
Dividends payment, date
Dividend Payable Payment Date
Dividends record date
Dividends Payable Date Of Record Day Month And Year
Accounting Policies [Abstract]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Statistical Measurement
Range [Axis]
Statistical Measurement
Range [Member]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Concentration Risk Benchmark
Concentration Risk By Benchmark [Axis]
Concentration Risk Benchmark
Concentration Risk Benchmark [Domain]
Revenue Benchmark
Sales Revenue Net [Member]
Accounts Receivable
Accounts Receivable [Member]
Concentration Risk Type
Concentration Risk By Type [Axis]
Concentration Risk Type
Concentration Risk Type [Domain]
Concentration of Credit Risk
Credit Concentration Risk [Member]
Accounting Standards Update 2018-09
Accounting Standards Update201809 [Member]
ASU 2016-02
Valuation Allowance by Deferred Tax Asset
Valuation Allowance By Deferred Tax Asset [Axis]
Deferred Tax Asset
Deferred Tax Asset [Domain]
Net deferred tax asset.
Net Deferred Tax Asset
Net Deferred Tax Asset [Member]
Deferred tax asset.
Deferred Tax Asset
Deferred Tax Asset [Member]
Accounting Standards Update 2018-02
Accounting Standards Update201802 [Member]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Contributions to ESOP
Employee Stock Ownership Plan E S O P Shares Contributed To E S O P
Repurchase of shares of common stock from ESOP
Treasury Stock Common Shares
Redemption value of ESOP participants interest
Employee Stock Ownership Plan E S O P Repurchase Obligation Amount
Change in accounting principle, adopted
Change In Accounting Principle Accounting Standards Update Adopted
Change in accounting principle, adoption date
Change In Accounting Principle Accounting Standards Update Adoption Date
Change In Accounting Principle Accounting Standards Update Transition Option Elected Extensible List
Change In Accounting Principle Accounting Standards Update Transition Option Elected Extensible List
Adoption of ASC 606
Revenue performance obligation payment terms.
Performance obligations payment terms from date of invoice
Revenue Performance Obligation Payment Terms
Number of customers representing ten percent or more of revenues.
Number of customers representing ten percent or more of accounts receivable.
Concentration risk percentage
Concentration Risk Percentage1
Number of customers representing more than 10% of revenue
Number Of Customers Representing Ten Percent Or More Of Revenues
Number of customers representing more than 10% of accounts receivable
Number Of Customers Representing Ten Percent Or More Of Accounts Receivable
Intangible assets useful lives of underlying assets
Acquired Finite Lived Intangible Assets Weighted Average Useful Life
Change in accounting principle, accounting standards update, immaterial effect
Change In Accounting Principle Accounting Standards Update Immaterial Effect
Schedule Of Business Acquisitions By Acquisition [Table]
Schedule Of Business Acquisitions By Acquisition [Table]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Indirect, General and Administrative Expense.
Indirect, General and Administrative Expense
Indirect General And Administrative Expense [Member]
Short-term Debt, Type
Short Term Debt Type [Axis]
Short-term Debt, Type
Short Term Debt Type [Domain]
Term loan.
Term Loan
Term Loan [Member]
Credit Facility
Credit Facility [Axis]
Credit Facility
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Braxton
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Percentage of ownership interest acquired
Business Acquisition Percentage Of Voting Interests Acquired
Cash paid to acquire
Payments To Acquire Businesses Gross
Borrowed under credit agreement to partially fund the acquisition
Business Combination Consideration Transferred Liabilities Incurred
Acquisition related expenses
Business Combination Acquisition Related Costs
Cash and cash equivalents
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents
Accounts receivable
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables
Inventory
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory
Prepaid expenses and other current assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets
Property and equipment
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment
Right of use assets, operating leases
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Operating Leases Right Of Use Assets
Deferred tax assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets
Intangible assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill
Other noncurrent assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets
Intangible and other assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible And Other Assets
Accounts payable
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable
Accrued expenses and other current liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accrued Expenses And Other Liabilities
Contract liabilities
Short-term lease liabilities, operating leases
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Operating Leases Short Term Lease Liabilities
Income tax payable
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Income Tax Payable
Deferred tax liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities
Long-term lease liabilities, operating leases
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Operating Leases Long Term Lease Liabilities
Other long-term liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other
Net assets acquired
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net
Finite Lived Intangible Assets Acquired As Part Of Business Combination [Table]
Finite Lived Intangible Assets Acquired As Part Of Business Combination [Table]
Finite-Lived Intangible Assets by Major Class
Finite Lived Intangible Assets By Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name
Finite Lived Intangible Assets Major Class Name [Domain]
Developed Technology
Developed Technology Rights [Member]
Customer Relationships
Customer Relationships [Member]
Backlog
Order Or Production Backlog [Member]
Trade Name
Trade Names [Member]
Leases
Lease Agreements [Member]
Non compete Agreements
Noncompete Agreements [Member]
In-Process Research and Development
In Process Research And Development [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount
Finitelived Intangible Assets Acquired1
Amortization Period (in years)
Amortization of intangible assets
Amortization Of Intangible Assets
Goodwill deductible for tax purposes
Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount
Revenues
Business acquisition, pro forma net income (loss), including portion attributable to noncontrolling interest.
Pro forma Revenue
Business Acquisitions Pro Forma Revenue
Pro forma Net Income including noncontrolling interest
Business Acquisition Pro Forma Net Income Loss Including Portion Attributable To Noncontrolling Interest
Pro forma Net Income
Business Acquisitions Pro Forma Net Income Loss
Disaggregation Of Revenue [Table]
Disaggregation Of Revenue [Table]
Contract with Customer, Basis of Pricing
Contract With Customer Basis Of Pricing [Axis]
Contract with Customer, Basis of Pricing
Contract With Customer Basis Of Pricing [Domain]
Cost plus.
Cost-Plus
Cost Plus [Member]
Time-and-Materials
Time And Materials Contract [Member]
Fixed-Price
Fixed Price Contract [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation Of Revenue [Line Items]
Revenues
Contract with customer asset and liabilities net.
Change in contract with customer assets and liabilities net.
Change in contract with customer assets.
Change in contract with customer liability.
Contract assets
Contract With Customer Asset Net
Contract liabilities
Contract With Customer Liability
Net contract assets (liabilities)
Contract With Customer Asset Liability Net
Change in contract assets
Change In Contract With Customer Assets
Change in contract liabilities
Change In Contract With Customer Liability
Change in contract assets and liabilities
Change In Contract With Customer Assets And Liabilities Net
Contract with customer asset cumulative catchup adjustment to revenue change in measure of progress percent.
Contract with customer liability cumulative catchup adjustment to revenue change in measure of progress percent.
Contract with customer asset cumulative catchup adjustment to revenue change in measure of progress percent.
Percentage change in contract assets
Contract With Customer Asset Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent
Percentage change in contract liabilities
Contract With Customer Liability Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent
Percentage change in contract assets and liabilities
Contract With Customer Asset Liability Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent
Contract receivable retainage assets (Liabilities) net.
Contract receivable retainage asset (liabilities) net, due after one year.
Contract retentions
Contract Receivable Retainage Assets Liabilities Net
Contract retentions, not expected to be paid in next 12 months
Contract Receivable Retainage Asset Liabilities Net Due After One Year
Contract assets, unapproved change orders, claims, and requests
Contracts Receivable Claims And Uncertain Amounts
Revenue recognized included contract liability
Contract With Customer Liability Revenue Recognized
Acquired contract assets
Contract With Customer Asset Increase Decrease For Contract Acquired In Business Combination
Acquired contract liabilities
Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination
Impairment of contract assets
Capitalized Contract Cost Impairment Loss
Contract with customer adjustment to revenue impact of changes in estimated claims or incentives over threshold.
Impact of changes in estimated claims or incentives on revenue
Contract With Customer Adjustment To Revenue Impact Of Changes In Estimated Claims Or Incentives Over Threshold
Revenue impact, net
Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress
Billed receivables current.
Billed
Billed Receivables Current
Unbilled
Unbilled Receivables Current
Total accounts receivable, gross
Accounts Receivable Gross Current
Allowance for doubtful accounts
Allowance For Doubtful Accounts Receivable Current
Total accounts receivable, net
Remaining unsatisfied performance obligations
Revenue Remaining Performance Obligation
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Table]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Table]
Segments
Statement Business Segments [Axis]
Segments
Segment [Domain]
Federal Solution Segment.
Federal Solution Segment
Federal Solution Segment [Member]
Critical Infrastructure Segment.
Critical Infrastructure
Critical Infrastructure Segment [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
Lessee lease term of contract.
Lessee lease option to extend.
Lessee lease existence of option to extend.
Lessee lease option to terminate.
Lessee lease existence of option to terminate.
Finance lease right of use assets accumulated depreciation.
Lessee Lease Description [Table]
Lessee Lease Description [Table]
Indirect, general and administrative expenses.
Indirect General And Administrative Expenses
Indirect General And Administrative Expenses [Member]
Lessee Lease Description [Line Items]
Lessee Lease Description [Line Items]
Lease term of contract
Lessee Lease Term Of Contract
Lease option to extend
Lessee Lease Option To Extend
Lease existence of option to extend
Lessee Lease Existence Of Option To Extend
Lease option to terminate
Lessee Lease Option To Terminate
Lease existence of option to terminate
Lessee Lease Existence Of Option To Terminate
Finance lease right-of-use asset
Finance Lease Right Of Use Asset
Finance lease right of use assets accumulated depreciation
Finance Lease Right Of Use Assets Accumulated Depreciation
Operating lease cost
Operating Lease Cost
Short-term lease cost
Short Term Lease Cost
Amortization of right-of-use assets
Finance Lease Right Of Use Asset Amortization
Interest on lease liabilities
Finance Lease Interest Expense
Sublease income
Sublease Income
Total lease cost
Lease Cost
Operating cash flows for operating leases
Operating Lease Payments
Operating cash flows for financing activities
Finance Lease Interest Payment On Liability
Financing cash flows from finance leases
Finance Lease Principal Payments
Right-of-use assets obtained in exchange for new operating lease liabilities
Right Of Use Asset Obtained In Exchange For Operating Lease Liability
Right-of-use assets obtained in exchange for new finance lease liabilities
Right Of Use Asset Obtained In Exchange For Finance Lease Liability
Operating lease.
Lease liabilities.
Finance leases.
Finance leases other assets noncurrent.
Weighted average remaining lease term.
Weighted average discount rate.
Operating Leases:
Operating Leases [Abstract]
Right-of-use assets
Lease liabilities:
Lease Liabilities [Abstract]
Current
Long-term
Total operating lease liabilities
Operating Lease Liability
Finance Leases:
Finance Leases [Abstract]
Other noncurrent assets
Finance Leases Other Assets Noncurrent
Accrued expenses and other current liabilities
Finance Lease Liability Current
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]
Finance Lease Liability Current Statement Of Financial Position Extensible List
Other long-term liabilities
Finance Lease Liability Noncurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]
Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List
Weighted Average Remaining Lease Term:
Weighted Average Remaining Lease Term [Abstract]
Operating leases
Operating Lease Weighted Average Remaining Lease Term1
Finance leases
Finance Lease Weighted Average Remaining Lease Term1
Weighted Average Discount Rate:
Weighted Average Discount Rate [Abstract]
Operating leases
Operating Lease Weighted Average Discount Rate Percent
Finance leases
Finance Lease Weighted Average Discount Rate Percent
Operating lease not yet commenced expense.
Operating lease not yet commenced expense
Operating Lease Not Yet Commenced Expense
Operating Leases
Operating Lease Liabilities Payments Due [Abstract]
2021
Lessee Operating Lease Liability Payments Due Next Twelve Months
2022
Lessee Operating Lease Liability Payments Due Year Two
2023
Lessee Operating Lease Liability Payments Due Year Three
2024
Lessee Operating Lease Liability Payments Due Year Four
2025
Lessee Operating Lease Liability Payments Due Year Five
Thereafter
Lessee Operating Lease Liability Payments Due After Year Five
Total lease payments
Lessee Operating Lease Liability Payments Due
Less: imputed interest
Lessee Operating Lease Liability Undiscounted Excess Amount
Total present value of lease liabilities
Finance Leases
Finance Lease Liabilities Payments Due [Abstract]
2021
Finance Lease Liability Payments Due Next Twelve Months
2022
Finance Lease Liability Payments Due Year Two
2023
Finance Lease Liability Payments Due Year Three
2024
Finance Lease Liability Payments Due Year Four
2025
Finance Lease Liability Payments Due Year Five
Thereafter
Finance Lease Liability Payments Due After Year Five
Total lease payments
Finance Lease Liability Payments Due
Less: imputed interest
Finance Lease Liability Undiscounted Excess Amount
Total present value of lease liabilities
Finance Lease Liability
Rental expense
Operating Lease Expense
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Employee stock purchase plan.
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of per-share market value limit for share purchases
Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date
Purchase price paid for shares sold
Number of shares sold
Share Based Compensation Arrangement By Share Based Payment Award Shares Purchased For Award
Average purchase price
Share Based Compensation Arrangement By Share Based Payment Award Per Share Weighted Average Price Of Shares Purchased
Employee service share based compensation tax benefit realized from vesting of awards.
Stock-based compensation expense, net of tax benefits
Allocated Share Based Compensation Expense Net Of Tax
Stock-based compensation expense, tax benefits
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
Stock-based compensation expense, tax benefit realized related to awards vested
Employee Service Share Based Compensation Tax Benefit Realized From Vesting Of Awards
Compensation cost related to non-vested awards not yet recognized
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
Unrecognized compensation costs recognized period
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
Share based compensation arrangement by share based payment award number of years over which share price increase.
Number of years over which share price increase
Share Based Compensation Arrangement By Share Based Payment Award Number Of Years Over Which Share Price Increase
Vesting period
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1
Number of Units, Unvested, Beginning balance
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
Number of Units, Granted
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
Number of Units, Vested
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
Number of Units, Forfeited
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
Number of Units, Unvested, Ending balance
Weighted Average Grant-Date Fair Value, Unvested, Beginning balance
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
Weighted Average Grant-Date Fair Value, Granted
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
Weighted Average Grant-Date Fair Value, Vested
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
Weighted Average Grant-Date Fair Value, Forfeited
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
Weighted Average Grant-Date Fair Value, Unvested, Ending balance
Total cash settled awards
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid
Service based restricted stock units RSU.
Restricted Stock Units (Service Condition)
Service Based Restricted Stock Units R S U [Member]
Service and performance based restricted stock units RSU.
Restricted Stock Units (Service and Performance Condition)
Service And Performance Based Restricted Stock Units R S U [Member]
Number of Units, Forfeited
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures
Share based compensation arrangement common stock related to employee statutory income tax withholding shares retired.
Share issued
Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period
Common stock related to employee statutory income tax withholding, shares retired
Share Based Compensation Arrangement Common Stock Related To Employee Statutory Income Tax Withholding Shares Retired
Number of shares
Weighted Average Grant-Date Fair Value
Schedule Of Goodwill [Table]
Schedule Of Goodwill [Table]
Federal Solutions
Goodwill [Line Items]
Goodwill [Line Items]
Beginning Balance
Acquisitions
Goodwill Acquired During Period
Foreign Exchange
Goodwill Foreign Currency Translation Gain Loss
Ending Balance
Goodwill impairments
Goodwill Impairment Loss
Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table]
Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table]
In Process Research and Development
Other Intangibles
Other Intangible Assets [Member]
Gross Carrying Amount
Finite Lived Intangible Assets Gross
Accumulated Amortization
Finite Lived Intangible Assets Accumulated Amortization
Net Carrying Amount
Finite Lived Intangible Assets Net
Amortization expense of intangible assets
Finite lived intangible assets amortizable amount.
2021
Finite Lived Intangible Assets Amortization Expense Next Twelve Months
2022
Finite Lived Intangible Assets Amortization Expense Year Two
2023
Finite Lived Intangible Assets Amortization Expense Year Three
2024
Finite Lived Intangible Assets Amortization Expense Year Four
2025
Finite Lived Intangible Assets Amortization Expense Year Five
Thereafter
Finite Lived Intangible Assets Amortization Expense After Year Five
Finite-Lived Intangible Assets, Net
Finite Lived Intangible Assets Amortizable Amount
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Long-Lived Tangible Asset
Property Plant And Equipment By Type [Axis]
Long-Lived Tangible Asset
Property Plant And Equipment Type [Domain]
Buildings and Leasehold Improvements
Building And Building Improvements [Member]
Furniture and Equipment
Furniture And Fixtures [Member]
Computer Systems and Equipment
Computer Equipment [Member]
Construction equipment.
Construction Equipment
Construction Equipment [Member]
Construction in Progress
Construction In Progress [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment [Line Items]
Property and equipment, gross
Property Plant And Equipment Gross
Accumulated depreciation
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Property and equipment, net
Useful life (years)
Property Plant And Equipment Useful Life
Depreciation expense
Depreciation
Number of sale leaseback transactions consummated.
Number of office buildings sold.
Sale Leaseback Transaction [Table]
Sale Leaseback Transaction [Table]
Revision of Prior Period, Change in Accounting Principle, Adjustment
Revision Of Prior Period Change In Accounting Principle Adjustment [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction [Line Items]
Sale leaseback transaction, description
Sale Leaseback Transaction Description Of Asset S
Number of sale leaseback transactions consummated
Number Of Sale Leaseback Transactions Consummated
Number of sale leaseback transaction associated with sale
Number Of Office Buildings Sold
Gain recognized to the sale leaseback transaction
Sale And Leaseback Transaction Gain Loss Net
Deferred gain resulting from sale-leaseback transactions
Sale Leaseback Transaction Deferred Gain Net
Amortization of deferred gain
Sale Leaseback Transaction Amortization Of Deferred Gain
Deferred gain balance recognized
Project cost accruals current.
Salaries and wages
Accrued Salaries Current
Employee benefits
Accrued Employee Benefits Current
Self-insurance liability
Accrued Insurance Current
Project cost accruals
Project Cost Accruals Current
Other accrued expenses
Other Accrued Liabilities Current
Total accrued expenses and other current liabilities
Debt Instrument [Table]
Debt Instrument [Table]
Long-term Debt, Type
Longterm Debt Type [Axis]
Long-term Debt, Type
Longterm Debt Type [Domain]
Senior Notes
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Short-Term
Short Term Borrowings
Long-term debt
Debt Instrument Carrying Amount
Convertible senior notes
Convertible Notes Payable
Debt discount
Debt Instrument Unamortized Discount Noncurrent
Long-term debt issuance costs
Deferred Finance Costs Noncurrent Net
Total long-term
Long Term Debt
Total Debt
Debt Longterm And Shortterm Combined Amount
Line of credit facility extended date.
Variable Rate
Variable Rate [Axis]
Variable Rate
Variable Rate [Domain]
Base Rate
Base Rate [Member]
LIBOR
London Interbank Offered Rate L I B O R [Member]
Private Placement
Private Placement [Member]
Balance Sheet Location
Balance Sheet Location [Axis]
Balance Sheet Location
Balance Sheet Location [Domain]
Accrued expenses and other current liabilities.
Accrued Expenses and Other Current Liabilities
Accrued Expenses And Other Current Liabilities [Member]
Fair Value Hierarchy and NAV
Fair Value By Fair Value Hierarchy Level [Axis]
Fair Value Hierarchy and NAV
Fair Value Measurements Fair Value Hierarchy [Domain]
Level 2
Fair Value Inputs Level2 [Member]
Convertible Senior Notes
Convertible Debt [Member]
Convertible note hedge and warrant transaction.
Convertible Note Hedge And Warrant Transaction
Convertible Note Hedge And Warrant Transaction [Member]
Amended and restated credit agreement date
Line Of Credit Facility Initiation Date1
Debt issuance costs incurred
Deferred Finance Costs Net
Revolving credit facility
Line Of Credit Facility Current Borrowing Capacity
Increase in revolving credit facility
Line Of Credit Facility Maximum Borrowing Capacity
Credit agreement extended date
Line Of Credit Facility Extended Date
Margin interest rate
Debt Instrument Basis Spread On Variable Rate1
Interest rate
Debt Instrument Interest Rate Stated Percentage
Letters of credit outstanding amount
Letters Of Credit Outstanding Amount
Interest expense
Interest Expense Debt
Debt instrument, outstanding amount
Repayment of outstanding balance
Repayments Of Debt
Debt Amount
Debt Instrument Face Amount
Series A senior note.
Senior Note, Series A
Series A Senior Note [Member]
Series B senior note.
Senior Note, Series B
Series B Senior Note [Member]
Series C senior note.
Senior Note, Series C
Series C Senior Note [Member]
Series D senior note.
Senior Note, Series D
Series D Senior Note [Member]
Maturity Date
Debt Instrument Maturity Date
Interest Rate
Debt Instrument Interest Rate During Period
Interest payments
Debt Instrument Periodic Payment
Interest payable
Interest Payable Current
Senior notes, fair value
Notes Payable Fair Value Disclosure
Debt instrument exercise of option by initial purchasers aggregate principal amount.
Exercise of option by initial purchasers aggregate principal amount
Debt Instrument Exercise Of Option By Initial Purchasers Aggregate Principal Amount
Proceeds from issuance and sale of debt
Proceeds From Debt Net Of Issuance Costs
Transaction fees and other third-party offering expenses
Debt Instrument Fee Amount
Debt instrument, payment terms
Debt Instrument Payment Terms
Debt instrument, frequency of periodic payment
Debt Instrument Frequency Of Periodic Payment
Convertible note converted each amount.
Convertible notes converted each into shares of common stock.
Convertible note converted each amount
Convertible Note Converted Each Amount
Convertible notes converted each into shares of common stock
Convertible Notes Converted Each Into Shares Of Common Stock
Debt Instrument, conversion price
Debt Instrument Convertible Conversion Price1
Threshold trading days
Debt Instrument Convertible Threshold Trading Days
Threshold consecutive trading days
Debt Instrument Convertible Threshold Consecutive Trading Days1
Conversion percentage of stock price trigger
Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger
Debt instrument convertible business period.
Debt instrument convertible consecutive business day period.
Debt instrument convertible principal amount.
Debt instrument convertible measurement period percentage.
Number of business day period
Debt Instrument Convertible Business Period
Consecutive trading day period
Debt Instrument Convertible Consecutive Business Day Period
Convertible principal amount
Debt Instrument Convertible Principal Amount
Measurement period, percentage
Debt Instrument Convertible Measurement Period Percentage
Percentage of principal amount to redeem convertible senior notes.
Percentage of principal amount to redeem convertible senior notes
Percentage Of Principal Amount To Redeem Convertible Senior Notes
Percentage of convertible senior notes repurchased at cash.
Percentage of convertible senior notes repurchased at cash
Percentage Of Convertible Senior Notes Repurchased At Cash
Debt instrument convertible debt liability.
Debt instrument convertible notes additional paid in capital.
Debt liability
Debt Instrument Convertible Debt Liability
Debt instrument convertible notes additional paid in capital
Debt Instrument Convertible Notes Additional Paid In Capital
Convertible senior notes effective interest rate
Debt Instrument Interest Rate Effective Percentage
Net carrying value of notes
Convertible Debt
Debt discount
Debt Instrument Unamortized Discount
Carrying amount
Equity component
Debt Instrument Convertible Carrying Amount Of The Equity Component
Debt instrument number of shares issuable upon conversion.
Cost of convertible note hedge transactions.
Bond hedge term.
Bond hedge term
Bond Hedge Term
Number of shares issuable upon conversion
Debt Instrument Number Of Shares Issuable Upon Conversion
Cost of convertible note hedge transaction
Cost Of Convertible Note Hedge Transaction
Number of common stock acquired by offsetting sale warrants.
Number of common stock acquired by offsetting sale warrants.
Number Of Common Stock Acquired By Offsetting Sale Warrants
Exercise price of warrants
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
Percentage of bond hedge and warrant transactions increased conversion price.
Percentage of bond hedge and warrant transactions increased conversion price
Percentage Of Bond Hedge And Warrant Transactions Increased Conversion Price
Net cost of purchase of bond hedges and sale of warrants.
Purchase of bond hedges and sale of warrants
Net Cost Of Purchase Of Bond Hedges And Sale Of Warrants
Other liabilities noncurrent.
Self-insurance liability
Self Insurance Reserve Noncurrent
Reserve for uncertain tax positions
Liability For Uncertain Tax Positions Noncurrent
Finance lease obligations
Other long-term liabilities
Other Liabilities Noncurrent1
Total other long-term liabilities
Percentage of net operating loss carryforwards to offset of taxable income during a period.
Allowable business interest deduction percentage of adjusted taxable income.
Operating loss carryforwards, tax refund claim related to acquisition.
Operating loss carryforwards description.
Income taxes.
Income taxes.
Income Taxes [Table]
Income Taxes [Table]
Jurisdiction
Statutory Accounting Practices By Jurisdiction [Axis]
Statutory Accounting Practices, Jurisdiction
Statutory Accounting Practices Jurisdiction [Domain]
Coronavirus aid, relief, and economic security act.
CARES Act
Coronavirus Aid Relief And Economic Security Act [Member]
Income Tax Authority
Income Tax Authority [Axis]
Income Tax Authority
Income Tax Authority [Domain]
U.S. States
State And Local Jurisdiction [Member]
Foreign
Foreign Country [Member]
State and local jurisdiction and foreign.
U.S. States and Foreign
State And Local Jurisdiction And Foreign [Member]
U.S. Federal
Domestic Country [Member]
Tax Period
Tax Period [Axis]
Tax Period
Tax Period [Domain]
Earliest Tax Year
Earliest Tax Year [Member]
Income Taxes [Line Items]
Income Taxes [Line Items]
Percentage of net operating loss (NOL) carryovers to offset of taxable income
Percentage Of Net Operating Loss Carryforwards To Offset Of Taxable Income During Period
Allowable business interest deduction percentage of adjusted taxable income
Allowable Business Interest Deduction Percentage Of Adjusted Taxable Income
Operating loss carryforwards description
Operating Loss Carryforwards Description
Net operating loss carryforwards, tax refund claim related to acquisition
Operating Loss Carryforwards Tax Refund Claim Related To Acquisition
United States Earnings
Foreign Earnings
Income before income tax expense
Current
Current Income Tax Expense Benefit Continuing Operations [Abstract]
Federal
Current Federal Tax Expense Benefit
State
Current State And Local Tax Expense Benefit
Foreign
Current Foreign Tax Expense Benefit
Total current income tax expense
Current Income Tax Expense Benefit
Deferred
Deferred Income Tax Expense Benefit Continuing Operations [Abstract]
Federal
Deferred Federal Income Tax Expense Benefit
State
Deferred State And Local Income Tax Expense Benefit
Foreign
Deferred Foreign Income Tax Expense Benefit
Total deferred tax expense (benefit)
Total income tax expense (benefit)
Effective income tax rate reconciliation, transaction costs.
Income before income tax expense (benefit)
Tax at federal statutory tax rate
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
S- corporation exclusion
Income Tax Reconciliation Nondeductible Expense
State taxes, net of federal tax benefit
Income Tax Reconciliation State And Local Income Taxes
Change in tax status
Income Tax Reconciliation Change In Enacted Tax Rate
Change in valuation allowance
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
Change in uncertain tax positions
Income Tax Reconciliation Tax Contingencies
Foreign tax rate differential
Income Tax Reconciliation Foreign Income Tax Rate Differential
Foreign tax credits
Income Tax Reconciliation Tax Credits Foreign
Transaction costs
Income Tax Reconciliation Transaction Costs
Noncontrolling interests
Income Tax Reconciliation Minority Interest Income Expense
Federal research credits
Income Tax Reconciliation Tax Credits Research
Other, net
Income Tax Reconciliation Other Reconciling Items
Tax at federal statutory tax rate
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
S- corporation exclusion
Effective Income Tax Rate Reconciliation Nondeductible Expense
State taxes, net of federal tax benefit
Effective Income Tax Rate Reconciliation State And Local Income Taxes
Change in tax status
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
Change in valuation allowance
Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance
Change in uncertain tax positions
Effective Income Tax Rate Reconciliation Tax Contingencies
Foreign tax rate differential
Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
Foreign tax credits
Effective Income Tax Rate Reconciliation Tax Credits Foreign
Transaction costs
Effective Income Tax Rate Reconciliation Transaction Costs
Noncontrolling interests
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
Federal research credits
Effective Income Tax Rate Reconciliation Tax Credits Research
Other, net
Effective Income Tax Rate Reconciliation Other Reconciling Items Percent
Total income tax expense (benefit)
Effective Income Tax Rate Continuing Operations
Effective income tax rate
Accounts receivable billed current.
Deferred tax assets tax deferred expense project and non-project reserves.
Deferred tax assets revenue and cost recognition.
Deferred tax assets lease liability.
Deferred tax assets
Accounts Receivable Billed Current
Project and non-project reserves
Deferred Tax Assets Tax Deferred Expense Project And Non Project Reserves
Employee compensation and benefits
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits
Revenue and cost recognition
Deferred Tax Assets Revenue And Cost Recognition
Insurance accruals
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance
Net operating losses
Deferred Tax Assets Operating Loss Carryforwards
Lease liabilities
Deferred Tax Assets Lease Liability
Tax credit carryforwards
Deferred Tax Assets Tax Credit Carryforwards
Other
Deferred Tax Assets Other
Valuation allowance
Deferred Tax Assets Valuation Allowance
Total deferred tax assets
Deferred Tax Assets Gross
Deferred tax liabilities
Deferred Tax Liabilities [Abstract]
Intangible assets
Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets
Right of use assets
Deferred Tax Liabilities Leasing Arrangements
Other
Deferred Tax Liabilities Other
Total deferred tax liabilities
Deferred Income Tax Liabilities
Net deferred tax asset
Deferred Tax Assets Liabilities Net
Deferred tax assets, valuation allowance
Deferred tax assets, increase in valuation allowance
Valuation Allowance Deferred Tax Asset Change In Amount
Deferred tax assets recorded for foreign tax credit carryforwards
Deferred Tax Assets Tax Credit Carryforwards Foreign
Deferred tax operating loss carryforwards expiration description.
Deferred tax operating loss carryforwards expiration year.
Net operating loss carryforwards
Net operating loss carryforwards, not subject to expiration
Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration
Net operating loss carryforwards, expiration description
Deferred Tax Operating Loss Carryforwards Expiration Description
Net operating loss carryforwards, expiration year
Deferred Tax Operating Loss Carryforwards Expiration Year
Tax credit carry forward expiration year.
Foreign tax credit carryforwards
Tax Credit Carryforward Amount
Foreign tax credits, valuation allowance
Tax Credit Carryforward Valuation Allowance
Foreign tax credits, expiration year
Tax Credit Carry Forward Expiration Year
Income Tax Uncertainties [Abstract]
Beginning of year
Unrecognized Tax Benefits
Increases—current year tax positions
Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions
Increases—prior year tax positions
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
Decreases—prior year tax positions
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
Settlements
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
Lapse of statute of limitations
Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations
End of year
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits That Would Impact Effective Tax Rate
Unrecognized tax benefits, income tax penalties and interest expense
Unrecognized Tax Benefits Income Tax Penalties And Interest Expense
Interest and penalties associated with uncertain tax positions
Income Tax Examination Penalties And Interest Expense
Unrecognized tax benefits, income tax penalties and interest accrued
Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued
Open tax year
Open Tax Year
Decrease in uncertain tax positions within twelve months
Decrease In Unrecognized Tax Benefits Is Reasonably Possible
Loss contingency, number of claims.
Legal Proceedings [Line Items]
Legal Proceedings [Table]
Legal Proceedings [Table]
Legal Proceedings [Table]
Legal Proceedings [Line Items]
Legal Proceedings [Line Items]
Number of claims outstanding
Loss Contingency Number Of Claims
Loss contingency damages value
Loss Contingency Damages Sought Value
Common stock shares outstanding including employee stock ownership plan shares.
Schedule Of Employee Stock Ownership Plan E S O P Disclosures [Table]
Schedule Of Employee Stock Ownership Plan E S O P Disclosures [Table]
Direct costs of contracts and indirect, general and administrative expense.
Direct Costs of Contracts and Indirect, General and Administrative Expense
Direct Costs Of Contracts And Indirect General And Administrative Expense [Member]
Other Noncurrent Assets
Other Noncurrent Assets [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee Stock Ownership Plan E S O P Disclosures [Line Items]
Shares fully vested, Description
Share Based Compensation Arrangement By Share Based Payment Award Description
Shares fully vested after credited service
Common stock shares outstanding including ESOP
Common Stock Shares Outstanding Including Employee Stock Ownership Plan Shares
Company's stock held by ESOP
Employee Stock Ownership Plan E S O P Shares In E S O P
ESOP contribution expense
Employee Stock Ownership Plan E S O P Compensation Expense
Employee stock ownership plan ESOP dividends declared per share.
Employee stock ownership plan ESOP dividends declared to ESOP.
Employee stock ownership plan ESOP dividends payment date.
Employee stock ownership plan ESOP dividend declared date.
ESOP dividends declared date
Employee Stock Ownership Plan E S O P Dividend Declared Date
ESOP dividends declared per share
Employee Stock Ownership Plan E S O P Dividends Declared Per Share
ESOP dividends declared amount
Employee Stock Ownership Plan E S O P Dividends Declared To E S O P
ESOP dividends payment date
Employee Stock Ownership Plan E S O P Dividends Payment Date
Dividends declared amount
Dividends Common Stock
Contribution to 401 (k) plan
Defined Contribution Plan Employer Discretionary Contribution Amount
Defined benefit pension plan, net assets position
Defined Benefit Plan Assets For Plan Benefits Noncurrent
Schedule Of Equity Method Investments [Table]
Schedule Of Equity Method Investments [Table]
Investment, Name
Schedule Of Equity Method Investment Equity Method Investee Name [Axis]
Investment, Name
Equity Method Investee Name [Domain]
Unconsolidated joint ventures.
Unconsolidated Joint Ventures
Unconsolidated Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Schedule Of Equity Method Investments [Line Items]
Current assets
Noncurrent assets
Assets Noncurrent
Current liabilities
Total joint venture equity
Costs
Net income attributable to noncontrolling interests
Noncurrent liabilities
Liabilities Noncurrent
Distributions from (contributions to) equity method investment.
Decrease in operating income and net income net of tax percentage.
Decrease in operating income.
Decrease in net income net of tax.
Decrease in earnings per share diluted.
Net distributions from unconsolidated joint ventures
Distributions From Contributions To Equity Method Investment
Write-down on unconsolidated joint venture
Equity Method Investment Sold Carrying Amount
Decrease in operating and net income net of tax percentage
Decrease In Operating Income And Net Income Net Of Tax Percentage
Decrease in operating income
Decrease In Operating Income
Decrease in net income net of tax
Decrease In Net Income Net Of Tax
Decrease in earnings per share diluted
Decrease In Earnings Per Share Diluted
Reimbursable cost incurred.
Schedule Of Related Party Transactions By Related Party [Table]
Schedule Of Related Party Transactions By Related Party [Table]
Unconsolidated joint ventures
Majority Owned Subsidiary Unconsolidated [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Revenues
Related Party Transaction Other Revenues From Transactions With Related Party
Reimbursable cost incurred
Reimbursable Cost Incurred
Accounts receivable
Accounts Receivable Related Parties Current
Fair Value By Balance Sheet Grouping [Table]
Fair Value By Balance Sheet Grouping [Table]
Level 1
Fair Value Inputs Level1 [Member]
Level 3
Fair Value Inputs Level3 [Member]
Investment Type
Investment Type [Axis]
Investments
Investment Type Categorization [Member]
Mutual Funds
Mutual Fund [Member]
Fixed Income
Fixed Income Funds [Member]
Cash and Cash Equivalents
Cash And Cash Equivalents [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets, fair value disclosure
Assets Fair Value Disclosure
Redeemable equity common stock fair value.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Redeemable Common Stock
Redeemable Equity Common Stock Fair Value
Redeemable equity common stock carrying amount.
Shares held by ESOP
Employee Stock Ownership Plan E S O P Number Of Allocated Shares
Shares held by ESOP, redemption values
Redeemable Equity Common Stock Carrying Amount
Fair value measurement with unobservable inputs reconciliation recurring basis liability purchases of treasury stock.
Fair value measurement with unobservable inputs reconciliation recurring basis liability contributions of treasury stock to ESOP
Fair value measurement with unobservable inputs reconciliation recurring basis liability share price adjustment.
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net [Abstract]
Balance at beginning of year
Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value
Purchases of treasury stock
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases Of Treasury Stock
Contributions of treasury stock to ESOP
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Contributions Of Treasury Stock To E S O P
Share price adjustment
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Share Price Adjustment
Transfer to permanent equity
Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3
Balance at end of year
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Antidilutive Securities
Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]
Antidilutive Securities, Name
Antidilutive Securities Name [Domain]
Equity-based Awards
Stock Compensation Plan [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
Basic weighted average number of shares outstanding
Weighted Average Number Of Shares Outstanding Basic
Equity-based awards
Incremental Common Shares Attributable To Share Based Payment Arrangements
Convertible senior notes
Incremental Common Shares Attributable To Conversion Of Debt Securities
Diluted weighted average number of shares outstanding
Weighted Average Number Of Diluted Shares Outstanding
Net income attributable to Parsons Corporation
Convertible senior notes if-converted method interest adjustment
Dilutive Securities Effect On Basic Earnings Per Share Other
Diluted net income attributable to Parsons Corporation
Net Income Loss Attributable To Parent Diluted
Schedule Of Segment Reporting Information By Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Geographical
Statement Geographical [Axis]
Geographical
Segment Geographical [Domain]
United States
UNITED STATES
Revenue
Sales [Member]
Subsegments
Subsegments [Axis]
Subsegments
Subsegments [Domain]
Mobility solutions.
Mobility Solutions
Mobility Solutions [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of reportable segments
Number Of Reportable Segments
Total revenues
Reconciliation from net income to adjusted EBITDA.
Adjusted EBITDA attributable to Parsons Corporation
Reconciliation From Net Income To Adjusted E B I T D A [Abstract]
Adjusted EBITDA attributable to Parsons Corporation
Adjusted E B I T D A Attributable To Parent
Adjusted EBITDA attributable to noncontrolling interests
Adjusted E B I T D A Attributable To Noncontrolling Interests
Depreciation and amortization
Interest expense, net
Interest Income Expense Net
Litigation-related expenses
Litigation Claim Settlement Related Expense Income
Amortization of deferred gain resulting from sale- leaseback transactions
Equity-based compensation
Allocated Share Based Compensation Expense
Transaction-related costs
Transaction Related Costs
Restructuring
Restructuring Charges
Other
Other Reconciliation From Net Income To Adjusted E B I T D A
Other nonoperating income.
Other Income
Other Nonoperating Income [Member]
Reversal of accrued liability
North America
North America [Member]
Middle East
Middle East [Member]
Rest of World
Non Us [Member]
Space and Geospatial Solutions.
Space & Geospatial Solutions
Space And Geospatial Solutions [Member]
Cyber & Intelligence.
Cyber & Intelligence
Cyber And Intelligence [Member]
Missile Defense & C5ISR.
Missile Defense & C5ISR
Missile Defense C5 I S R [Member]
Engineered systems.
Engineered Systems
Engineered Systems [Member]
Connected Communities.
Connected Communities
Connected Communities [Member]
Revenue excluding claim settlement.
Litigation-related expenses
Revenue Excluding Claim Settlement
Revenue Excluding Claim Settlement
Changes in reportable segments, description
Description Of Effect On Previously Reported Segment Information For Change In Composition Of Reportable Segments
Quarterly financial information.
Quarterly financial information.
Quarterly Financial Information [Table]
Quarterly Financial Information [Table]
Quarterly Financial Information [Line Items]
Quarterly Financial Information [Line Items]
Operating income
Net income attributable to Parsons Corporation
Adjusted EBITDA attributable to noncontrolling interests
Interest expense, net
Income tax expense (benefit)
Stock-based compensation
Transaction related costs
Restructuring
Other
Valuation And Qualifying Accounts Disclosure [Table]
Valuation And Qualifying Accounts Disclosure [Table]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type
Valuation Allowances And Reserves Type [Axis]
SEC Schedule, 12-09, Valuation Allowances and Reserves
Valuation Allowances And Reserves [Domain]
Allowance for Doubtful Accounts
Allowance For Credit Loss [Member]
Valuation Allowance on Deferred Tax Assets
Valuation Allowance Of Deferred Tax Assets [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period
Valuation Allowances And Reserves Balance
Additions
Valuation Allowances And Reserves Charged To Cost And Expense
Deductions
Valuation Allowances And Reserves Deductions
Other and foreign exchange impact
Valuation Allowances And Reserves Adjustments
Balance at end of period