Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Equity [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Member]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Amortization of net actuarial loss
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Tax benefit
Income Tax Expense (Benefit)
Net income
Net Income (Loss) Attributable to Parent
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Operating Lease Payments
Lessee, Operating Lease, Disclosure [Table Text Block]
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information
Quarterly Financial Information [Table Text Block]
Subsequent Events [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Repurchase of common stock
Treasury Stock, Value, Acquired, Cost Method
Stock repurchased, restricted stock awards, value withheld for taxes
Stock Repurchased During Period, Restricted Stock Awards, Value Withheld For Taxes
Stock Repurchased During Period, Restricted Stock Awards, Value Withheld For Taxes
Stock repurchased (in shares)
Treasury Stock, Shares, Acquired
Stock repurchased, restricted stock withheld for taxes (in shares)
Stock Repurchased During Period, Restricted Stock Withheld For Taxes, Shares
Stock Repurchased During Period, Restricted Stock Withheld For Taxes, Shares
Dividends payable, amount (in dollars per share)
Dividends Payable, Amount Per Share
Share repurchase program, amount authorized
Stock Repurchase Program, Authorized Amount
Share repurchase program, remaining authorized repurchase amount
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Retirement Plan Name [Axis]
Retirement Plan Name [Axis]
Retirement Plan Name [Domain]
Retirement Plan Name [Domain]
Officer Medical Plan
Officer Medical Plan [Member]
Officer Medical Plan [Member]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Other Postretirement Benefits Plan
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Net actuarial loss
Defined Benefit Plan, Amortization of Gain (Loss)
Total postretirement medical expense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Employee Benefit Plans
Pension and Other Postretirement Benefits Disclosure [Text Block]
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts
Schedule of Valuation and Qualifying Accounts [Table Text Block]
Schedule of Valuation and Qualifying Accounts [Table Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Post-retirement plans
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Derivatives designated as cash flow hedges
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Totals
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year
Stockholders' Equity Attributable to Parent
Other comprehensive income (loss) before reclassifications
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Amounts reclassified from accumulated other comprehensive loss
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Total other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Reclassification of AOCI due to the Act
Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings
Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings
End of year
Tax expense
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Income tax expense computed at U.S. federal statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Changes in uncertain tax positions
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount
State and local income taxes, net of federal tax
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Foreign income taxes, net of federal tax
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Meals and entertainment
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Amount
Re-measurement of deferred taxes related to the Act
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
Excess tax benefits from stock-based compensation
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Federal tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Total
Federal statutory income tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, by Related Party [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Related Party [Axis]
Related Party [Axis]
Related Party [Domain]
Related Party [Domain]
Affiliated Entity
Affiliated Entity [Member]
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Pledge Obligation
Pledge Obligation [Member]
Pledge Obligation [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Amount of pledge
Due to Affiliate, Current
Amount of related party transaction
Related Party Transaction, Amounts of Transaction
Operating Loss Carryforwards [Table]
Operating Loss Carryforwards [Table]
Tax Period [Axis]
Tax Period [Axis]
Tax Period [Domain]
Tax Period [Domain]
Tax Years 2013-2015
Tax Years 2013-2015 [Member]
Tax Years 2013-2015 [Member]
Tax Years 2016-2018
Tax Years 2016-2018 [Member]
Tax Years 2016-2018 [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Domestic
Domestic Tax Authority [Member]
Foreign
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards [Line Items]
Deferred tax assets, projected effective rate at which position will reverse
Deferred Tax Assets, Projected Effective Rate At Which Position Will Reverse
Deferred Tax Assets, Projected Effective Rate At Which Position Will Reverse
Deferred tax liabilities, projected effective rate at which position will reverse
Deferred Tax Liabilities, Projected Effective Rate At Which Position Will Reverse
Deferred Tax Liabilities, Projected Effective Rate At Which Position Will Reverse
Tax Act change in tax rate, provisional income tax benefit
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)
Tax Act, provisional income tax benefit
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)
Net operating losses
Operating Loss Carryforwards
Net operating loss, valuation allowance
Operating Loss Carryforwards, Valuation Allowance
Income tax reserves
Liability for Uncertainty in Income Taxes, Noncurrent
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Pre-acquisition uncertain tax positions
Pre-acquisition uncertain tax positions
Pre-acquisition uncertain tax positions
Accrued interest and penalties
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense
Release of indemnified pre-acquisition uncertain tax positions
Release of indemnified pre-acquisition uncertain tax positions
Release of Indemnified Pre-Acquisition Uncertain Tax Positions
Indemnified pre-acquisition uncertain tax positions
Pre-acquisition Uncertain Tax Positions that May Be Indemnified Under the Remaining Available Deferred Payment Obligation
Pre-acquisition Uncertain Tax Positions that May Be Indemnified Under the Remaining Available Deferred Payment Obligation
Income tax reserve, accrued penalties and interest
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Income tax assessments
Income Tax Examination, Estimate of Possible Loss
Reconciliation of the beginning and ending amount of potential tax benefits
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning of year
Unrecognized Tax Benefits
Increases in prior year position
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Increases in current year position
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Settlements with taxing authorities
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Lapse of statute of limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
End of year
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Customer relationships
Customer Relationships [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Aquilent
eGov Holdings, Inc. (d/b/a Aquilent) [Member]
eGov Holdings, Inc. (d/b/a Aquilent)
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Total purchase consideration paid at closing
Business Combination, Consideration Transferred
Acquisition-related contingent consideration
Business Combination, Contingent Consideration, Liability
Customer-relationship intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Finite-lived intangible asset, useful life (in years)
Finite-Lived Intangible Asset, Useful Life
Tax indemnification liability
Business Combination, Tax Indemnification Liability
Business Combination, Tax Indemnification Liability
Income tax uncertainty
Goodwill
Goodwill
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Dividend, Type [Axis]
Dividend, Type [Axis]
Dividend, Type [Axis]
Dividend, Type [Domain]
Dividend, Type [Domain]
Dividend, Type [Domain]
Ordinary Dividend
Ordinary Cash Dividend [Member]
Ordinary Cash Dividend [Member]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Stock Options
Employee Stock Option [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends declared per share (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected volatility
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Risk-free interest rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Expected life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Weighted-average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Related-Party Transactions
Related Party Transactions Disclosure [Text Block]
Revenue
Sales Revenue, Services, Net
Operating income
Operating Income (Loss)
Income before income taxes
Net income
Earnings per common share:
Earnings Per Share [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
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, Depletion and Amortization
Stock-based compensation expense
Share-based Compensation
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Excess tax benefits from stock-based compensation
Excess Tax Benefit from Share-based Compensation, Operating Activities
Amortization of debt issuance costs and loss on extinguishment
Amortization Of Financing Costs And Discounts and Gain/Loss on Extinguishment of Debt
Amortization Of Financing Costs And Discounts and Loss on Extinguishment of Debt
Losses (gains) on dispositions and impairments
Gain (Loss) on Disposition of Property and Intangible Impairment
Gain (Loss) on Disposition of Property and Intangible Impairment
Changes in assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Income taxes receivable / payable
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Other long-term assets
Increase (Decrease) in Other Noncurrent Assets
Accrued compensation and benefits
Increase (Decrease) in Employee Related Liabilities
Accounts payable and other accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Accrued interest
Increase (Decrease) in Interest Payable, Net
Income tax reserves
Increase (Decrease) in Reserve for Commissions, Expense and Taxes
Other current liabilities
Increase (Decrease) in Other Operating Liabilities
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]
Purchases of property and equipment
Payments to Acquire Property, Plant, and Equipment
Payments for business acquisitions, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Insurance proceeds received for damage to equipment
Proceeds from Insurance Settlement, Investing Activities
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 issuance of common stock
Proceeds from Issuance of Common Stock
Stock option exercises
Proceeds from Stock Options Exercised
Excess tax benefits from stock-based compensation
Excess Tax Benefit from Share-based Compensation, Financing Activities
Repurchases of common stock
Payments for Repurchase of Common Stock
Cash dividends paid
Payments of Dividends
Dividend equivalents paid to option holders
Payments of Capital Distribution
Repayment of debt
Repayments of Debt
Proceeds from debt issuance
Proceeds from Issuance of Long-term Debt
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Net increase (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents––beginning of year
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents––end of year
Supplemental disclosures of cash flow information
Supplemental Cash Flow Information [Abstract]
Interest
Interest Paid
Income taxes
Income Taxes Paid, Net
Supplemental disclosures of non-cash investing and financing activities
Noncash Investing and Financing Items [Abstract]
Share repurchases transacted but not settled and paid
Share Repurchases Incurred But Not Yet Paid
Share Repurchases Incurred But Not Yet Paid
Contingent consideration arising from businesses acquired
Noncash or Part Noncash Acquisition, Other Liabilities Assumed
Schedule of Accumulated Other Comprehensive Loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Summary of Reclassifications Out of Accumulated Other Comprehensive Loss to Net Income
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Employer matching contribution, percentage of match
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Employees’ Capital Accumulation Plan, Total expense recognized
Defined Contribution Plan, Cost
Employees’ Capital Accumulation Plan, Company-paid contributions
Defined Contribution Plan, Employer Discretionary Contribution Amount
Retired Officers' Bonus Plan
Supplemental Employee Retirement Plan [Member]
Deferred compensation arrangement with individual, annual cash award granted per year of service, amount
Deferred Compensation Arrangement with Individual, Annual Cash Award Granted per Year of Service, Amount
Deferred Compensation Arrangement with Individual, Annual Cash Award Granted per Year of Service, Amount
Long-term disability obligation
Postemployment Benefits Liability, Noncurrent
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Cost of revenue
Cost of Sales [Member]
General and administrative expenses
General and Administrative Expense [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
EIP
Amended and Restated Equity Incentive Plan [Member]
Amended and Restated Equity Incentive Plan [Member]
Annual Incentive Plan
Annual Incentive Plan [Member]
Annual Incentive Plan [Member]
Restricted Stock
Restricted Stock [Member]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Class A Common Stock
Common Class A [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense
Allocated Share-based Compensation Expense
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value, Measurements, Recurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Level 3
Fair Value, Inputs, Level 3 [Member]
Asset Class [Axis]
Asset Class [Axis]
Fair Value by Asset Class [Domain]
Asset Class [Domain]
Cash and cash equivalents
Cash [Member]
Money market fund
Money Market Funds [Member]
Liability Class [Axis]
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
Contingent Consideration Liability
Contingent Consideration [Member]
Contingent Consideration [Member]
Liability
Other Noncurrent Liabilities [Member]
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]
Total cash and cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Current derivative instruments
Derivative Asset, Current
Long-term derivative instruments
Derivative Asset, Noncurrent
Total other assets
Other Assets, Fair Value Disclosure
Total liabilities
Liabilities, Fair Value Disclosure, Recurring
Money market funds, net asset value per share (in dollars per share)
Cash And Cash Equivalents Invested In Money Market Funds, Net Asset Value, Per Share
Cash And Cash Equivalents Invested In Money Market Funds, Net Asset Value, Per Share
Contingent consideration liability
Business Combination, Contingent Consideration, Liability, Noncurrent
Compensation Related Costs [Abstract]
Schedule of Accrued Compensation and Benefits
Schedule of Accrued Compensation And Benefits [Table Text Block]
Schedule of Accrued Compensation And Benefits [Table Text Block]
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Other Accrued Expenses
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Preliminary allocation:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets
Other tangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Current liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities
Tax indemnification liability
Income tax uncertainty
Total purchase consideration transfer at closing
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes
Senior Notes [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Term Loan A
Tranche-A Loans [Member]
Tranche A Loans [Member]
Term Loan B
Tranche B Loans [Member]
Tranche B Loans [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Total
Long-term Debt, Gross
2019
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
2020
Long-term Debt, Maturities, Repayments of Principal in Year Two
2021
Long-term Debt, Maturities, Repayments of Principal in Year Three
2022
Long-term Debt, Maturities, Repayments of Principal in Year Four
2023
Long-term Debt, Maturities, Repayments of Principal in Year Five
Thereafter
Long-term Debt, Maturities, Repayments of Principal after Year Five
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Accounts Receivable
Accounts Receivable [Member]
Other long-term assets
Other Noncurrent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current assets:
Assets, Current [Abstract]
Accounts receivable–billed
Billed Contracts Receivable
Accounts receivable–unbilled
Unbilled Contracts Receivable
Allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable, Current
Accounts receivable, net
Accounts Receivable, Net, Current
Total accounts receivable, net
Accounts Receivable, Net
Provision for doubtful accounts
Provision for Doubtful Accounts
Schedule of Debt
Schedule of Debt [Table Text Block]
Schedule of Future Debt Principal Repayments
Schedule of Maturities of Long-term Debt [Table Text Block]
Schedule of Interest Expense
Interest Income and Interest Expense Disclosure [Table Text Block]
Segment Reporting [Abstract]
Business Segment Information
Segment Reporting Disclosure [Text Block]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Reconciliation of the income used to compute basic and diluted EPS
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Furniture and equipment
Furniture and Fixtures [Member]
Computer equipment
Computer Equipment [Member]
Software
Software and Software Development Costs [Member]
Leasehold improvements
Leasehold Improvements [Member]
Internally developed software
Software Development [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property and equipment, gross
Property, Plant and Equipment, Gross
Accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property and equipment, net
Property, Plant and Equipment, Net
Depreciation and amortization expense related to property and equipment
Depreciation
Reduction to gross cost and accumulated depreciation for zero net book value assets
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment
Other Liabilities Disclosure [Abstract]
Deferred payment obligation:
Deferred Payment Obligation
Deferred Payment Obligation
Accrued interest
Accrued Interest on Deferred Payment Obligation
Accrued Interest on Deferred Payment Obligation
Amount recorded in the consolidated balance sheet
Liabilities of Business Transferred under Contractual Arrangement, Current and Noncurrent
Liabilities of Business Transferred under Contractual Arrangement, Current and Noncurrent
Special Cash Dividend
Special Cash Dividend [Member]
Special Cash Dividend [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Unvested, ending balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, beginning balance, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Vested, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Forfeited, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Unvested, beginning balance, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Expired (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Outstanding, ending balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Forfeited, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Expired, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Exercised, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Outstanding, ending balance, weighted average exercise price (in dollars per share)
Dividend, option exercise price reduction, per share (in dollars per share)
Dividend, Option Exercise Price Reduction, Per Share
Dividend, Option Exercise Price Reduction, Per Share
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Unvested, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares
Forfeited (in shares)
Unvested, ending balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, beginning balance, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value
Granted, weighted average grant date fair value (in dollars per share)
Vested, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value
Forfeited, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value
Unvested, ending balance, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Exercise price, lower range limit (in dollars per share)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit
Exercise price, upper range limit (in dollars per share)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit
Stock Options Outstanding (in shares)
Outstanding, Weighted Average Exercise Price (in dollars per share)
Outstanding, Weighted Average Remaining Contractual Life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Outstanding, Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Stock Options Exercisable (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Stock Options Exercisable, Weighted Average Exercise Price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Stock Options Exercisable, Weighted Average Remaining Contractual Life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Stock Options Exercisable, Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Unaudited Quarterly Financial Data
Quarterly Financial Information [Text Block]
Retired Officers' Bonus Plan and Retired Vice-President Bonus Plan
Retired Officers' Bonus Plan and Retired Vice-President Bonus Plan [Member]
Retired Officers' Bonus Plan and Retired Vice-President Bonus Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of the year
Defined Benefit Plan, Benefit Obligation
Net actuarial (gain) loss
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Benefits paid
Defined Benefit Plan, Benefit Obligation, Benefits Paid
Benefit obligation, end of the year
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year
Defined Benefit Plan, Fair Value of Plan Assets
Employer contributions
Defined Benefit Plan, Plan Assets, Contributions by Employer
Benefits paid
Defined Benefit Plan, Plan Assets, Benefits Paid
Fair value of plan assets, end of the year
Defined benefit plan, funded (unfunded) status of plan
Defined Benefit Plan, Funded (Unfunded) Status of Plan
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Alternative Base Rate (ABR)
Alternative Base Rate (ABR) [Member]
Alternative Base Rate (ABR) [Member]
London Interbank Offered Rate (LIBOR)
London Interbank Offered Rate (LIBOR) [Member]
Secured Debt
Secured Debt [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Senior Notes Due 2025
Senior Notes Due 2025 [Member]
Senior Notes Due 2025 [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term Debt, Current and Noncurrent [Abstract]
Interest rate on long term debt
Debt Instrument, Interest Rate, Effective Percentage
Interest Rate on credit facilities
Line of Credit Facility, Interest Rate at Period End
Long-term debt outstanding
Revolving credit facility
Long-term Line of Credit
Less: Unamortized debt issuance costs and discount on debt
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Long-term debt
Long-term Debt
Less: Current portion of long-term debt
Long-term Debt, Current Maturities
Long-term debt, net of current portion
Long-term Debt, Excluding Current Maturities
Unrecognized gross actuarial gain
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax
Unrecognized actuarial gain, tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax
Amount of tax expense (benefit) related to (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.
Amount to be amortized from accumulated other comprehensive income (loss) next fiscal year
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year
Net prior service cost, accumulated other comprehensive income net periodic cost in fiscal 2016
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year
Net transition (asset) obligation, accumulated other comprehensive income net periodic cost in fiscal 2016
Defined Benefit Plan, Expected Amortization of Transition Asset (Obligation), Next Fiscal Year
Summary of Accounts Receivable, Net
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Vendor payables
Accounts Payable, Trade, Current
Accrued expenses
Accrued Liabilities, Current
Total accounts payable and other accrued expenses
Accounts Payable and Accrued Liabilities, Current
Cash payment for special dividends
Share-based compensation arrangement, plan modification, incremental compensation cost recognized in period
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Recognized
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Recognized
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview
Nature of Operations [Text Block]
Recurring dividends
Dividend equivalents
Dividend equivalent [Member]
Dividend equivalent [Member]
Dividends
Dividends
Loss Contingencies [Table]
Loss Contingencies [Table]
Loss Contingency Nature [Axis]
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Former stockholder litigation
Former Stockholder Litigation [Member]
Former Stockholder Litigation [Member]
Litigation Court [Axis]
Litigation Court [Axis]
Litigation Court [Axis]
Litigation Court Type [Domain]
Litigation Court Type [Domain]
Litigation Court Type [Domain]
United States Court of Appeals for the Ninth Circuit
United States Court of Appeals for the Ninth Circuit [Member]
United States Court of Appeals for the Ninth Circuit [Member]
United States District Court for the Southern District of New York
United States Court of Appeals for the Second Circuit [Member]
United States Court of Appeals for the Second Circuit [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Loss contingencies, number of plaintiffs
Loss Contingency, Number of Plaintiffs
Loss contingencies, new claims filed, number
Loss Contingency, New Claims Filed, Number
Loss contingencies, claims amended, number
Loss Contingency, Claims Amended, Number
Loss Contingency, Claims Amended, Number
Loss contingencies, pending claims, number
Loss Contingency, Pending Claims, Number
Loss contingencies, claims dismissed, number
Loss Contingency, Claims Settled and Dismissed, Number
Loss contingencies, claims settled, number
Loss Contingency, Claims Settled, Number
Accounting Policies [Abstract]
Summary of Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies [Text Block]
Income Statement [Abstract]
Revenue
Operating costs and expenses:
Costs and Expenses [Abstract]
Cost of revenue
Cost of Services, Direct Labor, Employee Benefits, and Overhead
Cost of revenue includes direct labor, related employee benefits, and overhead.
Billable expenses
Billable Expenses
Billable expenses include direct subcontractor expenses, travel expenses, and other expenses incurred to perform on contracts.
General and administrative expenses
General and Administrative Expense
Depreciation and amortization
Total operating costs and expenses
Costs and Expenses
Operating income
Interest expense
Interest Expense
Other income (expense), net
Other Nonoperating Income (Expense)
Income before income taxes
Income tax expense
Earnings per common share (Note 3):
Valuation and Qualifying Accounts Disclosure [Table]
Valuation and Qualifying Accounts Disclosure [Table]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves [Domain]
Valuation Allowances and Reserves [Domain]
Allowance for doubtful accounts
Allowance for Doubtful Accounts, Continuing Operations [Member]
Tax valuation allowance
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts Disclosure [Line Items]
Movement in Valuation Allowances and Reserves [Roll Forward]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance
Valuation Allowances and Reserves, Balance
Provision for doubtful accounts
Valuation Allowances and Reserves, Additions for Charges to Cost and Expense
Charges against allowance
Valuation Allowances and Reserves, Deductions
Ending balance
Other Long-Term Liabilities
Other Liabilities Disclosure [Text Block]
Supplemental Financial Information
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Letter of Credit
Letter of Credit [Member]
Overnight Federal Funds Rate
Overnight Federal Funds Rate [Member]
Overnight Federal Funds Rate
Long-term debt, basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Revolving credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Maximum expanded loan facility
Long-term Debt, Maximum Expanded Loan Facility
Long-Term Debt, Maximum Expanded Loan Facility
Maximum net secured leverage ratio
Debt Instrument, Net Secured Leverage Ratio, Maximum
Debt Instrument, Net Secured Leverage Ratio, Maximum
Commitment fee percentage
Line of Credit Facility, Commitment Fee Percentage
Quarterly periodic payment percentage, principal
Debt Instrument, Quarterly Periodic Payment Percentage, Principal
Debt Instrument, Quarterly Periodic Payment Percentage, Principal
Proceeds from line of credit
Proceeds from Lines of Credit
Revolving credit facility, amount outstanding
Interest paid
Stated interest rate
Debt Instrument, Interest Rate, Stated Percentage
Debt issuance costs
Debt Issuance Costs, Gross
2019
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months
2020
Defined Benefit Plan, Expected Future Benefit Payment, Year Two
2021
Defined Benefit Plan, Expected Future Benefit Payment, Year Three
2022
Defined Benefit Plan, Expected Future Benefit Payment, Year Four
2023
Defined Benefit Plan, Expected Future Benefit Payment, Year Five
2024 - 2028
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter
Subsequent Events
Subsequent Events [Text Block]
Statement of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Cash and cash equivalents
Accounts receivable, net of allowance
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property and equipment, net of accumulated depreciation
Deferred tax assets
Deferred Income Tax Assets, Net
Intangible assets, net of accumulated amortization
Intangible Assets, Net (Excluding Goodwill)
Goodwill
Other long-term assets
Other Assets, Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Current portion of long-term debt
Accounts payable and other accrued expenses
Accrued compensation and benefits
Employee-related Liabilities, Current
Other current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Deferred tax liabilities
Deferred Income Tax Liabilities, Net
Other long-term liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies (Note 21)
Commitments and Contingencies
Stockholders’ equity:
Stockholders' Equity Attributable to Parent [Abstract]
Common stock, Class A — $0.01 par value — authorized, 600,000,000 shares; issued, 158,028,673 shares at March 31, 2018 and 155,901,485 shares at March 31, 2017; outstanding, 143,446,539 shares at March 31, 2018 and 148,887,708 shares at March 31, 2017
Common Stock, Value, Issued
Treasury stock, at cost — 14,582,134 shares at March 31, 2018 and 7,013,777 shares at March 31, 2017
Treasury Stock, Value
Additional paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total stockholders’ equity
Total liabilities and stockholders’ equity
Liabilities and Equity
Number of operating segments
Number of Operating Segments
Number of reportable segments
Number of Reportable Segments
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Pro Forma
Pro Forma [Member]
Restatement Adjustment
Restatement Adjustment [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2017-07
Accounting Standards Update 2017-07 [Member]
Accounting Standards Update 2017-07 [Member]
Accounting Standards Update 2016-09
Accounting Standards Update 2016-09 [Member]
Accounting Standards Update 2014-09
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of net periodic benefit costs
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component
Excess tax benefits
Increase in accounts receivable
Increase in deferred tax liabilities
Increase in retained earnings
Impairment charge on intangibles
Impairment of Intangible Assets, Finite-lived
Retired Officers' Bonus Plan
Retired Officers' Bonus Plan [Member]
Retired Officers' Bonus Plan [Member]
Retired Vice Presidents' Bonus Plan
Retired Vice Presidents' Bonus Plan [Member]
Retired Vice Presidents' Bonus Plan [Member]
Weighted-average discount rate for benefit obligation
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
2019
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2020
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2023
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Thereafter
Finite-Lived Intangible Assets, Amortization Expense, after Year Five
Total estimated amortization expense
Finite-Lived Intangible Assets, Net
Current
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal
Current Federal Tax Expense (Benefit)
State and local
Current State and Local Tax Expense (Benefit)
Foreign
Current Foreign Tax Expense (Benefit)
Total current
Current Income Tax Expense (Benefit)
Deferred
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal
Deferred Federal Income Tax Expense (Benefit)
State and local
Deferred State and Local Income Tax Expense (Benefit)
Foreign
Deferred Foreign Income Tax Expense (Benefit)
Total deferred
Accounts Payable and Other Accrued Expenses
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Document and Entity Information [Abstract]
Entities [Table]
Entities [Table]
Class B Non-Voting Common Stock
Common Class B [Member]
Class C Restricted Common Stock
Common Class C [Member]
Class E Special Voting Common Stock
Common Class E [Member]
Classification of common stock that has different rights than Common Class A, B or C shares, representing the voting rights that accompany options that were issued in exchange for old stock rights that existed prior to the merger with The Carlyle Group.
Entity Information [Line Items]
Entity Information [Line Items]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Entity Current Reporting Status
Entity Current Reporting Status
Entity Public Float
Entity Public Float
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Summary of Stock-based Compensation Expense Recognized in the Consolidated Statements of Operations
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Schedule of Unrecognized Compensation Cost
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]
Schedule of Black Scholes Weighted Average Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Unvested Restricted Stock Activity
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Summary of Stock Options Outstanding
Share-based Compensation, Stock Options, Activity [Table Text Block]
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Customer relationships and other amortizable intangible assets
Order or Production Backlog [Member]
Indefinite-lived Intangible Assets by Major Class [Axis]
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Trade name
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value
Finite-Lived Intangible Assets, Gross
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Unamortizable intangible assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Intangible assets, gross
Intangible Assets, Gross (Excluding Goodwill)
Net Carrying Value
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan [Member]
Common stock votes per share
Common Stock Votes Per Share
Common stock votes per share
Employee stock purchase plan, aggregate shares
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Employee stock purchase plan, purchase price discount from the fair market value
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date
Common stock purchased by employees (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Repurchase of common stock (in shares)
Summary of Components of Income Tax Expense
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Components of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Unrecognized Tax Benefits
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Goodwill impairment
Goodwill, Impairment Loss
Summary of Intangible Assets
Schedule of Intangible Assets and Goodwill [Table Text Block]
Summary of Expected Amortization Expense for Intangible Assets
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Schedule of Components of Net Postretirement Medical Expense
Schedule of Net Benefit Costs [Table Text Block]
Schedule of Weighted-average Discount Rate For Benefit Obligation
Schedule of Assumptions Used [Table Text Block]
Schedule of Assumed Health Care Cost Trend Rates
Schedule of Health Care Cost Trend Rates [Table Text Block]
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
Schedule of Change in Benefit Obligation
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
Schedule of Change in Fair Value of Plan Assets
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Schedule of Expected Future Benefit Payments
Schedule of Expected Benefit Payments [Table Text Block]
Deferred income tax assets:
Deferred Tax Assets, Net [Abstract]
Accrued expenses
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities
Accrued compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Stock-based compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Pension and postretirement benefits
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits
Property and equipment
Deferred Tax Assets, Property, Plant and Equipment
Net operating loss/Capital loss carryforwards
Deferred Tax Assets, Net Operating Loss & Capital Loss Carryforwards
Deferred Tax Assets, Net Operating Loss & Capital Loss Carryforwards
Deferred rent and tenant allowance
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent
Extended disability benefits
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits
State tax credits
Deferred Tax Assets, Tax Credit Carryforwards
Other
Deferred Tax Assets, Other
Total gross deferred income tax assets
Deferred Tax Assets, Gross
Less: Valuation allowance
Deferred Tax Assets, Valuation Allowance
Total net deferred income tax assets
Deferred Tax Assets, Net of Valuation Allowance
Deferred income tax liabilities:
Deferred Tax Liabilities, Net [Abstract]
Unbilled receivables
Deferred Tax Liabilities, Current Accounts Receivable, Unbilled
Amount of deferred tax liability attributable to taxable temporary differences from unbilled current accounts receivable.
Intangible assets
Deferred Tax Liabilities, Intangible Assets
Debt issuance costs
Deferred Tax Liabilities, Deferred Expense, Debt Issuance Costs
Property and equipment
Deferred Tax Liabilities, Property, Plant and Equipment
Interest rate swaps
Deferred Tax Liabilities, Derivatives
Other
Deferred Tax Liabilities, Other
Total deferred income tax liabilities
Deferred Tax Liabilities, Gross
Net deferred income tax liabilities
Deferred Tax Liabilities, Net
Net deferred income tax asset
Deferred Tax Assets, Net
Deferred rent
Deferred Rent Credit, Noncurrent
Postretirement benefit obligations
Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent
Other
Other Liabilities and Deferred Revenue, Noncurrent
Total other long-term liabilities
Deferred Payment Obligation
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block]
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Common Stock
Common Stock [Member]
Treasury Stock
Treasury Stock [Member]
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Retained Earnings
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss)
Special voting common stock, Class E
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (shares)
Shares, Outstanding
Issuance of common stock, in shares
Stock Issued During Period, Shares, New Issues
Issuance of common stock
Stock Issued During Period, Value, New Issues
Stock options exercised (in shares)
Stock options exercised
Stock Issued During Period, Value, Stock Options Exercised
Excess tax benefits from the exercise of stock options
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Repurchase of common stock (in shares)
Repurchase of common stock
Recognition of liability related to future stock option exercises
Adjustments To Additional Paid In Capital Recognition Of Liability Related To Future Stock Option Exercises
Adjustments To Additional Paid In Capital Recognition Of Liability Related To Future Stock Option Exercises
Other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Net of Tax
Dividends paid
Dividends, Cash
Stock-based compensation expense
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Balance (shares)
Unrecognized compensation cost related to unvested stock-based compensation agreements
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Unrecognized compensation cost, amortization period
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Total
2019
Unrecognized Compensation Cost, Next 12 Months
Unrecognized Compensation Cost, Next 12 Months
2020
Unrecognized Compensation Cost, Year Two
Unrecognized Compensation Cost, Year Two
2021
Unrecognized Compensation Cost, Year Three
Unrecognized Compensation Cost, Year Three
2022
Unrecognized Compensation Cost, Year Four
Unrecognized Compensation Cost, Year Four
2023
Unrecognized Compensation Cost, Year Five
Unrecognized Compensation Cost, Year Five
Health care cost trend rate assumed for next year, Pre 65
Defined Benefit Plan, Health Care Cost Trend Rate Assumed For Next Fiscal Year, Pre 65
Defined Benefit Plan, Health Care Cost Trend Rate Assumed For Next Fiscal Year, Pre 65
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), Pre 65
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Pre 65
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Pre 65
Year that the rate reaches the ultimate trend rate, Pre 65
Defined Benefit Plan, Year That Rate Reaches Ultimate Trend Rate, Pre 65
Defined Benefit Plan, Year That Rate Reaches Ultimate Trend Rate, Pre 65
Health care cost trend rate assumed for next year, Post 65
Defined Benefit Plan, Health Care Cost Trend Rate Assumed For Next Fiscal Year, Post 65
Defined Benefit Plan, Health Care Cost Trend Rate Assumed For Next Fiscal Year, Post 65
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), Post 65
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Post 65
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Post 65
Year that the rate reaches the ultimate trend rate, Post 65
Defined Benefit Plan, Year That Rate Reaches Ultimate Trend Rate, Post 65
Defined Benefit Plan, Year That Rate Reaches Ultimate Trend Rate, Post 65
Effect of one percentage point increase on total of service and interest cost
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components
Effect of one percentage point decrease on total of service and interest cost
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components
Effect of one percentage point increase on postretirement benefit obligation
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation
Effect of one percentage point decrease on postretirement benefit obligation
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation
Title of Individual [Axis]
Title of Individual [Axis]
Relationship to Entity [Domain]
Relationship to Entity [Domain]
Officer
Officer [Member]
Director
Director [Member]
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Stock option expiration period
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
Stock option vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Stock options granted (in shares)
Stock options granted, weighted average grant date fair value (in dollars per share)
Stock options granted, fair value
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Fair Value
share-based compensation arrangement by share-based payment award, options, grants in period, grant date fair value
Fair value of options vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value
Intrinsic value of options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Options available for future grant (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Annual Incentive Payment, equity portion, increase percentage
Share-Based Compensation Arrangement By Share-based Payment Award, Annual Incentive Payment, Equity Portion, Increase Percentage
Share-Based Compensation Arrangement By Share-based Payment Award, Annual Incentive Payment, Equity Portion, Increase Percentage
Restricted stock granted (in shares)
Aggregate fair value of all awards issued
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Grant date share price (in dollars per share)
Share Price
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gain on derivatives designated as cash flow hedges
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax
Change in postretirement plan costs
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Total other comprehensive (loss) income, net of tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Summary of Components of Property and Equipment, Net
Property, Plant and Equipment [Table Text Block]
Accounts Receivable, Net of Allowance
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Property and Equipment, Net
Property, Plant and Equipment Disclosure [Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative [Table]
Derivative [Table]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Cash Flow Hedging
Cash Flow Hedging [Member]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Other Current Assets
Other Current Assets [Member]
Other Noncurrent Assets
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Interest Rate Swap
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative [Line Items]
Notional amount of interest rate swap
Derivative, Notional Amount
Estimated fair value of derivative instruments
Derivative Instruments in Hedges, Assets, at Fair Value
Derivative instruments, gain recognized in AOCI
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion
Ineffectiveness recognized in earnings
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net
Estimated amounts to be reclassified over 12 months
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Reclassification
Reclassification, Policy [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Cash and Cash Equivalents
Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block]
Valuation of Accounts Receivable
Trade and Other Accounts Receivable, Policy [Policy Text Block]
Concentrations of Credit Risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Property and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Business Combinations
Business Combinations Policy [Policy Text Block]
Intangible Assets
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Comprehensive Income
Comprehensive Income, Policy [Policy Text Block]
Share-Based Payments
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Defined Benefit Plan and Other Postretirement Benefits
Pension and Other Postretirement Plans, Policy [Policy Text Block]
Self-Funded Medical Plans
Self Insurance Reserve [Policy Text Block]
Fair Value Measurements
Fair Value Measurement, Policy [Policy Text Block]
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Deferred payment obligation, original amount
Deferred Payment Obligation, original amount
Deferred Payment Obligation, original amount
Deferred payment obligation, term
Deferred Payment Obligation Term
Deferred Payment Obligation Term
Deferred payment obligation, payment pursuant of the Merger Agreement
Deferred Payment Obligation, Payment, Pursuant of the Merger Agreement
Deferred Payment Obligation, Payment, Pursuant of the Merger Agreement
Deferred payment obligation, payment
Deferred Payment Obligation, Payment
Deferred Payment Obligation, Payment
Deferred payment obligation, accrued interest payment
Deferred Payment Obligation, Interest Payment
Deferred Payment Obligation, Interest Payment
Indemnified pre-acquisition uncertain tax positions
Interest rate per six-month period on unpaid deferred payment obligation
Interest Rate Per Six-Month Period on Unpaid Deferred Payment Obligation
Interest Rate Per Six-Month Period on Unpaid Deferred Payment Obligation
Residual balance estimated to be paid
Number of employees
Entity Number of Employees
Summary of Fair Value Measurements
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Accrued Compensation and Benefits
Compensation Related Costs, General [Text Block]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share Basic And Diluted by Common Class [Table]
Schedule of Earnings Per Share Basic And Diluted by Common Class [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Schedule of Earnings Per Share Basic And Diluted by Common Class [Line Items]
Schedule of Earnings Per Share Basic And Diluted by Common Class [Line Items]
Earnings for basic computations
Undistributed Earnings, Basic
Weighted-average common shares outstanding for basic computations
Weighted Average Number of Shares Outstanding, Basic
Earnings for diluted computations
Undistributed Earnings, Diluted
Dilutive stock options and restricted stock
Weighted Average Number Diluted Shares Outstanding Adjustment
Average number of common shares outstanding for diluted computations
Weighted Average Number of Shares Outstanding, Diluted
Unvested shares participating in the payment of the Company's dividends declared
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights
Payments of dividends
Undistributed earnings (loss) allocated to participating securities, basic
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic
Undistributed earnings (loss) allocated to participating securities, diluted
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted
Antidilutive options excluded from the computation of EPS
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Summary of Dividends Declared
Dividends Declared [Table Text Block]
Schedule of Other Long-Term Liabilities
Schedule of Other Assets and Other Liabilities [Table Text Block]
Acquisitions
Business Combination Disclosure [Text Block]
Debt
Debt Disclosure [Text Block]
Useful life
Property, Plant and Equipment, Useful Life
Impairment of long-lived assets
Impairment of Long-Lived Assets Held-for-use
Common stock, par value (in dollars per share)
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
Summary of Deferred Payment Obligation
Deferred Payment Obligation [Table Text Block]
Deferred Payment Obligation [Table Text Block]
Weighted Average
Weighted Average [Member]
Amortization of intangible assets
Amortization of Intangible Assets
Retired Officers' Bonus Plan, total pension expense
Benefits paid
Benefit obligation
Fair value of plan assets
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Bonus
Accrued Bonuses, Current
Retirement
Liability, Pension and Other Postretirement and Postemployment Benefits, Current
Vacation
Accrued Vacation, Current
Other
Other Employee-related Liabilities, Current
Total accrued compensation and benefits
Earnings Per Share
Earnings Per Share [Text Block]
Rent expense, net
Operating Leases, Rent Expense, Net
Rent expense, sublease rentals
Operating Leases, Rent Expense, Sublease Rentals
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2020
Operating Leases, Future Minimum Payments, Due in Two Years
2021
Operating Leases, Future Minimum Payments, Due in Three Years
2022
Operating Leases, Future Minimum Payments, Due in Four Years
2023
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Operating leases, future minimum payments due
Operating Leases, Future Minimum Payments Due
Operating Leases, Future Minimum Payments Due, Sublease Rentals, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Sublease Rentals, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Sublease Rentals, Fiscal Year Maturity [Abstract]
2019
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, In Twelve Months
Contractually required future rental payments receivable within twelve months from the balance sheet date on noncancelable subleasing arrangements.
2020
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, in Two Years
Contractually required future rental payments receivable within the second year from the balance sheet date on noncancelable subleasing arrangements.
2021
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, in Three Years
Contractually required future rental payments receivable within the third year from the balance sheet date on noncancelable subleasing arrangements.
2022
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, in Four Years
Contractually required future rental payments receivable within the fourth year from the balance sheet date on noncancelable subleasing arrangements.
2023
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, in Five Years
Contractually required future rental payments receivable within the fifth year from the balance sheet date on noncancelable subleasing arrangements.
Thereafter
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals, Due Thereafter
Contractually required future rental payments receivable after the fifth year from the balance sheet date on noncancelable subleasing arrangements.
Operating leases, future minimum payments due, future minimum sublease rentals
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals
Concentration Risk [Table]
Concentration Risk [Table]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Financial Standby Letter of Credit
Financial Standby Letter of Credit [Member]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Contracts with U.S. government agencies or other U.S. government contractors
Government Contracts Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk [Line Items]
Guarantor obligations, carrying value
Guarantor Obligations, Current Carrying Value
Guarantor obligations, reduction to available borrowings
Guarantor Obligations, Liquidation Proceeds, Monetary Amount
Guarantor obligations, facility
Guarantor Obligations, Facility
Guarantor Obligations, Facility
Guarantor obligations, available amount
Guarantor Obligations, Available Amount
Guarantor Obligations, Available Amount
Concentration risk, percentage
Concentration Risk, Percentage
Unfavorable Regulatory Action
Unfavorable Regulatory Action [Member]
Liability for reductions and/or penalties from U.S Government audits
Loss Contingency Accrual
Derivatives
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Interest expense, debt
Interest Expense, Debt
Deferred Payment Obligation Interest
Amortization of Debt Issuance Costs (DIC) and Original Issue Discount (OID)
Amortization of Debt Issuance Costs and Discounts
Other
Interest Expense, Other
Total Interest Expense
Stockholders' Equity
Stockholders' Equity Note Disclosure [Text Block]