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]
Term loan
Bank Term Loan [Member]
-- None. No documentation exists for this element. --
Senior notes
Senior Notes [Member]
Connecticut Economic Development Program
Connecticut Economic Development Program [Member]
-- None. No documentation exists for this element. --
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term debt, gross
Long-term Debt, Gross
Less: deferred financing fees
Debt Issuance Costs, Line of Credit Arrangements, Net
Net balance sheet carrying amount
Debt, Long-term and Short-term, Combined Amount
Income Tax Disclosure [Abstract]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance
Unrecognized Tax Benefits
Additions based on tax positions related to the current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Additions for tax positions of prior years
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Reductions for tax positions of prior years
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Reductions for expiration of statutes
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Settlements
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Decrease in foreign currency exchange rates
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation
Increase in foreign currency exchange rates
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation
Ending balance
Short-term Debt, Type [Axis]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Short-term Debt, Type [Domain]
Bridge Loan
Bridge Loan [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
CEB
CEB, Inc. [Member]
CEB, Inc.
Secured Debt
Secured Debt [Member]
Term B facility
Bank Term Loan - B Facility [Member]
Bank Term Loan - B Facility
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
2016 Credit Facility Agreement
2016 Credit Facility Agreement [Member]
2016 Credit Facility Agreement [Member]
Federal Funds rate
Federal Funds Rate [Member]
-- None. No documentation exists for this element. --
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Euro Dollar rate
Euro Dollar Rate [Member]
-- None. No documentation exists for this element. --
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Base Rate
Base Rate [Member]
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Proceeds from issuance of debt
Proceeds from Issuance of Debt
Additional borrowing capacity
Line of Credit Facility, Additional Borrowing Capacity
Line of credit facility, additional borrowing capacity.
Debt instrument term
Debt Instrument, Term
Line of credit facility, frequency of payments in quarterly installments
Line of Credit Facility, Frequency of Payments, Number of Quarterly Installments
Line of Credit Facility, Frequency of Payments, Number of Quarterly Installments
Additional interest above federal fund rate
Debt Instrument Interest Additional Interest Above Federal Fund Rate
Debt instrument interest additional interest above federal fund rate.
Debt instrument, interest, additional interest above eurodollar rate
Debt Instrument Interest Additional Interest Above Euro dollar Rate
Debt instrument interest additional interest above eurodollar rate.
Minimum applicable margin rate
Minimum Applicable Margin Rate
Minimum applicable margin rate.
Maximum applicable margin rate
Maximum Applicable Margin Rate
Maximum applicable margin rate.
Basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Mergers, Acquisitions And Dispositions Disclosures [Abstract]
Mergers, Acquisitions And Dispositions Disclosures [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
CEB and L2 Acquisitions
CEB And L2 Acquisitions [Member]
CEB And L2 Acquisitions [Member]
L2, Inc.
L2, Inc. [Member]
L2, Inc.
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Cash paid at close
Payments to Acquire Businesses, Gross
Additional cash paid
Business Combination, Consideration Transferred, Liabilities Incurred
Fair value of Gartner equity
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Total aggregate consideration
Business Combination, Consideration Transferred
Percentage of voting interests acquired
Business Acquisition, Percentage of Voting Interests Acquired
Net cash paid for acquisition
Payments to Acquire Businesses, Net of Cash Acquired
Business acquisition, shares issued as consideration (in shares)
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares
Business acquisition, consideration transferred, per share value (in dollars per share)
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Per Share Fair Value
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Per Share Fair Value
DEBT
Debt Disclosure [Text Block]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Projected benefit obligation
Defined Benefit Plan, Benefit Obligation
Pension plan assets at fair value
Defined Benefit Plan, Plan Assets, Amount
Funded status – shortfall
Defined Benefit Plan, Funded (Unfunded) Status of Plan
Amounts recorded in the Consolidated Balance Sheets for the plans
Amounts recorded in the Consolidated Balance Sheets for the plans: [Abstract]
-- None. No documentation exists for this element. --
Other liabilities — accrued pension obligation
Liability, Defined Benefit Plan, Noncurrent
Stockholders’ equity — deferred actuarial loss
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax
Future long-term rate of return on plan assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Future Expected Long-term Rate Of Return On Plan Assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Future Expected Long-term Rate Of Return On Plan Assets
Weighted average amortization period
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Deferred Actuarial Loss, Weighted Average Amortization Period
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Deferred Actuarial Loss, Weighted Average Amortization Period
Future amortization expense of unrecognized losses
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year
Earnings Per Share [Abstract]
Anti-dilutive common stock equivalents (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Average market price per share of Common Stock during the year (in dollars per share)
Average market price per share of Common Stock during the year
Market price per common share
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Disposed of by Sale
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
CEB Challenger
CEB Challenger [Member]
CEB Challenger [Member]
CEB Talent Assessment
CEB Talent Assessment [Member]
CEB Talent Assessment [Member]
CEB Workforce Survey and Analytics
CEB Workforce Survey and Analytics [Member]
CEB Workforce Survey and Analytics [Member]
Other Certain Assets In CEB Transaction
Other Certain Assets In CEB Transaction [Member]
Other Certain Assets In CEB Transaction [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of businesses sold
Number Of Businesses Sold
Number Of Businesses Sold
Divestiture, revenue contributed
Disposal Group, Including Discontinued Operation, Revenue
Divestiture, gross contribution
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Sale of business, consideration
Disposal Group, Including Discontinued Operation, Consideration
Proceeds from divestiture of businesses
Proceeds from Divestiture of Businesses
Gain on disposal
Gain (Loss) on Disposition of Business
Proceeds from sale of assets
Proceeds from Sale of Productive Assets
Gain on sale of assets
Gain (Loss) on Disposition of Assets
Share-based Payment Arrangement [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
CSEs
Common Stock Equivalents [Member]
-- None. No documentation exists for this element. --
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock Equivalents (CSEs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, 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
Converted to shares of Common Stock upon grant (in shares)
Converted to common shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Unvested, Conversions in Period.
Outstanding, Ending Balance (in shares)
Per Share Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, Beginning Balance (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 (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
Converted to shares of Common Stock upon grant (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested And Unvested Conversions In Period Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Unvested, Conversions in Period, Weighted Average Grant Date Fair Value.
Outstanding, Ending Balance (in dollars per share)
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Research
Research Segment [Member]
-- None. No documentation exists for this element. --
Conferences
Conferences [Member]
Conferences [Member]
Consulting
Consulting [Member]
-- None. No documentation exists for this element. --
Other
Other Segments [Member]
Goodwill [Line Items]
Goodwill [Line Items]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Beginning Balance
Goodwill
Divestitures
Goodwill, Written off Related to Sale of Business Unit
Additions due to acquisition
Goodwill, Acquired During Period
Foreign currency translation impact and other
Goodwill, Translation and Purchase Accounting Adjustments
Ending Balance
Accumulated goodwill impairment losses
Goodwill, Impaired, Accumulated Impairment Loss
Revenue from Contract with Customer [Abstract]
Assets:
Contract with Customer, Asset, after Allowance for Credit Loss [Abstract]
Fees receivable, gross
Accounts Receivable, before Allowance for Credit Loss, Current
Contract assets recorded in Prepaid expenses and other current assets
Contract with Customer, Asset, before Allowance for Credit Loss
Contract liabilities:
Contract with Customer, Liability [Abstract]
Deferred revenues (current liability)
Contract with Customer, Liability, Current
Non-current deferred revenues recorded in Other liabilities
Contract with Customer, Liability, Noncurrent
Total contract liabilities
Contract with Customer, Liability
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES
Fair Value Disclosures [Text Block]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Plan Assets
Plan Assets [Member]
-- None. No documentation exists for this element. --
Plan Liabilities
Plan Liabilities [Member]
-- None. No documentation exists for this element. --
Debt
Debt [Member]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Foreign currency forward contracts
Foreign Exchange Forward [Member]
Interest rate swap contracts
Interest Rate Swap [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]
Assets:
Assets: [Abstract]0
-- None. No documentation exists for this element. --
Total Assets
Assets, Fair Value Disclosure
Liabilities:
Liabilities: [Abstract]0
-- None. No documentation exists for this element. --
Total Liabilities
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Actuarial loss (gain) due to assumption changes and plan experience (1)
Actuarial loss (gain) due to assumption changes (1)
The net increase or decrease of changes in the value of the benefit obligation resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.
Contractual termination benefits
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits
Benefits paid
Defined Benefit Plan, Benefit Obligation, Benefits Paid
Foreign currency impact
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)
Projected benefit obligation at end of year
Expected future benefit payments, in 2020
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months
Expected future benefit payments, in 2021
Defined Benefit Plan, Expected Future Benefit Payment, Year Two
Expected future benefit payments, in 2022
Defined Benefit Plan, Expected Future Benefit Payment, Year Three
Expected future benefit payments, in 2023
Defined Benefit Plan, Expected Future Benefit Payment, Year Four
Expected future benefit payments, in 2024
Defined Benefit Plan, Expected Future Benefit Payment, Year Five
Expected future benefit payments in the five years thereafter
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Domain]
Initial Application Period Cumulative Effect Transition [Domain]
Difference between Revenue Guidance in Effect before and after Topic 606
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2014-09
Accounting Standards Update 2014-09 [Member]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Product Concentration Risk
Product Concentration Risk [Member]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Revenue Benchmark
Revenue Benchmark [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Number of reportable segments
Number of Reportable Segments
Concentration risk percentage
Concentration Risk, Percentage
Percentage of subscription contracts billable upon signing for twelve months of service
Segment Reporting Information, Percent Of Subscription Contracts Billable Upon Signing For Twelve Months Of Service
Segment Reporting Information, Percent Of Subscription Contracts Billable Upon Signing For Twelve Months Of Service
Refund liability
Accounts Receivable, Allowance for Credit Loss, Current
Revenue recognized previously attributable to deferred revenues
Contract with Customer, Liability, Revenue Recognized
Revenue reserve balance
Allowance For Doubtful Accounts Receivable, Revenue Reserve
Allowance For Doubtful Accounts Receivable, Revenue Reserve
Amortization of deferred sales commissions
Amortization of Deferred Sales Commissions
Leases [Abstract]
Future Minimum Cash Payments Under Non-cancelable Operating Leases
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
Total minimum lease payments
Operating Leases, Future Minimum Payments Due
Sublease income
Operating Leases, Income Statement, Sublease Revenue
Operating lease expense
Operating Lease, Expense
Lease costs
Lease, Cost [Table Text Block]
Operating lease maturity schedule
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Supplemental balance sheet information
Assets And Liabilities, Leases [Table Text Block]
Assets And Liabilities, Leases [Table Text Block]
Schedule of future minimum lease payments for capital leases
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
Business Acquisition, Pro Forma Information [Abstract]
Business Acquisition, Pro Forma Information [Abstract]
Pro forma total revenue
Business Acquisition, Pro Forma Revenue
Pro forma net income
Business Acquisition, Pro Forma Net Income (Loss)
Pro forma basic income (loss) per share (in dollars per share)
Business Acquisition, Pro Forma Earnings Per Share, Basic
Pro forma diluted income (loss) per share (in dollars per share)
Business Acquisition, Pro Forma Earnings Per Share, Diluted
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Accounting Standards Update 2016-02
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Operating lease liability
Operating Lease, Liability
Total Assets
Assets
Total Liabilities
Liabilities
Renewal term
Lessee, Operating Lease, Renewal Term
Option to terminate, term
Lessee, Operating Lease, Option to Terminate, Term
Lessee, Operating Lease, Option to Terminate, Term
Stock appreciation rights
Stock Appreciation Rights (SARs) [Member]
Restricted stock units
Restricted Stock Units (RSUs) [Member]
Common stock equivalents
Schedule of Stock-based Compensation Expense by Award Type
Share-based Payment Arrangement, Cost by Plan [Table Text Block]
Schedule of Stock-based Compensation Expense by Expense Category
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of Summary of the Changes in SARS, RSUs, and CSEs Outstanding
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
Schedule of Fair Value Assumptions of SARS
Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block]
Equity [Abstract]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, number of votes per share
Common Stock, Number of Votes per Share
Common Stock, Number of Votes per Share
Share repurchase program, authorized amount
Stock Repurchase Program, Authorized Amount
Stock repurchase program, remaining authorized repurchase amount
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Treasury Stock
Treasury Stock [Member]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Common Stock
Common Stock [Member]
Class of Stock [Line Items]
Class of Stock [Line Items]
Common Stock Outstanding Roll Forward [Roll Forward]
Common Stock Outstanding Roll Forward [Roll Forward]
Common Stock Outstanding Roll Forward [Roll Forward]
Beginning Balance
Shares, Outstanding
Issued in connection with the acquisition of CEB
Stock Issued During Period, Shares, Acquisitions
Issuances under stock plans
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Purchases for treasury
Treasury Stock, Shares, Acquired
Ending Balance
Payments for purchases of treasury stock
Payments for Repurchase of Common Stock
INCOME TAXES
Income Tax Disclosure [Text Block]
Cover page.
Document Type
Document Type
Document Annual Report
Document Annual Report
Document Transition Report
Document Transition Report
Entity File Number
Entity File Number
Entity Registrant Name
Entity Registrant Name
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
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
Title of 12(b) Security
Title of 12(b) Security
Trading Symbol
Trading Symbol
Security Exchange Name
Security Exchange Name
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 Interactive Data Current
Entity Interactive Data Current
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Shell Company
Entity Shell Company
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Amendment Flag
Amendment Flag
Entity Public Float
Entity Public Float
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Documents Incorporated by Reference
Documents Incorporated by Reference [Text Block]
Schedule of Debt
Schedule of Debt [Table Text Block]
Segment Reporting [Abstract]
SEGMENT INFORMATION
Segment Reporting Disclosure [Text Block]
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Summary of Valuation Allowance
Summary of Valuation Allowance [Table Text Block]
TOPO
TOPO Research LLC [Member]
TOPO Research LLC [Member]
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]
Content
Media Content [Member]
Acquired finite-lived intangible assets useful life
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Fees receivable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Prepaid expenses and other assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Goodwill
Finite-lived intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Total assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Total liabilities assumed (primarily deferred revenues)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Net assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Conferences
Events [Member]
-- None. No documentation exists for this element. --
Other
Other Revenue [Member]
Other Revenue
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
United States and Canada
United States And Canada [Member]
-- None. No documentation exists for this element. --
Europe, Middle East and Africa
Europe Middle East Africa [Member]
-- None. No documentation exists for this element. --
Other International
Other International [Member]
-- None. No documentation exists for this element. --
Total revenues
Revenue from Contract with Customer, Excluding Assessed Tax
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Significant Accounting Policies [Table]
Business and Significant Accounting Policies [Table]
Business and Significant Accounting Policies [Table]
ASU 2016-16
Accounting Standards Update 2016-16 [Member]
Accumulated Other Comprehensive (Loss) Income, Net
AOCI Attributable to Parent [Member]
Accumulated Earnings
Retained Earnings [Member]
Foreign currency exchange contracts
Foreign Currency Exchange Contracts [Member]
-- None. No documentation exists for this element. --
Business and Significant Accounting Policies [Line Items]
Business and Significant Accounting Policies [Line Items]
[Line Items] for Business and Significant Accounting Policies [Table]
Number of enterprises served
Number of Enterprises Served
Number of Enterprises Served
Number of countries in which entity operates
Number of Countries in which Entity Operates
Proceeds from the sale of an equity security
Proceeds from Sale of Equity Method Investments
Gain on sale of minority equity investment
Equity Securities, FV-NI, Unrealized Gain
Adoption of ASU No. 2018-02
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect
Adoption of ASU
Cumulative Effect of New Accounting Principle in Period of Adoption
Income tax benefit
Income Tax Expense (Benefit)
Depreciation expense
Depreciation
Net capitalized development costs for internal use software
Capitalized Computer Software, Net
Amortization of capitalized internal software development costs
Capitalized Computer Software, Amortization
Foreign currency transaction gain (loss)
Foreign Currency Transaction Gain (Loss), Realized
Derivative instruments, gain (loss) recognized in income, net
Derivative, Gain (Loss) on Derivative, Net
Revenue, remaining performance obligation
Revenue, Remaining Performance Obligation, Amount
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
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, Period
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Assets
Schedule of Other Assets [Table Text Block]
Statement of Comprehensive Income [Abstract]
Net income
Net Income (Loss) Attributable to Parent
Other comprehensive (loss) income, net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Interest rate swaps - net change in deferred gain or loss
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Pension plans - net change in deferred actuarial loss
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
-- None. No documentation exists for this element. --
Restricted Equity Award Type [Axis]
Restricted Equity Award Type [Axis]
-- None. No documentation exists for this element. --
RestrictedEquityAwardType [Domain]
RestrictedEquityAwardType [Domain]
-- None. No documentation exists for this element. --
Service-based Awards
Service Based Awards [Member]
-- None. No documentation exists for this element. --
Performance Shares
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Number of shares available for grant
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Total share-based compensation cost not yet recognized
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Remaining weighted average service period
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Weighted Average Remaining Contractual Term
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Granted in Period, Weighted Average Remaining Contractual Term.
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Award expiry period from date of grant
Share Based Compensation Arrangement By Share Based Payment Award Expiry Period From Date Of Grant
Share based compensation arrangement by share based payment award expiry period from date of grant.
Total compensation cost not yet recognized, period for recognition
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Base fee percentage
Base Fee Percentage
Base fee percentage.
Employee stock purchase plan, stock purchases as a percentage of employee compensation, maximum
Share Based Compensation Arrangement By Employee Stock Purchase Plan Stock Purchases As Percentage Of Employee Compensation Maximum
Share Based Compensation Arrangement By Employee Stock Purchase Plan Stock Purchases as Percentage Of Employee Compensation Maximum.
Maximum share value authorized for purchase under employee stock purchase plan
Share Based Compensation Arrangement By Share Based Payment Award Maximum Share Value Authorized For Purchase Under Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award Maximum Share Value Authorized For Purchase Under Employee Stock Purchase Plan.
Exercisable price percentage of closing price of another class of stock
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of Stock
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of Stock.
Maximum number of shares that may be purchased by eligible participants
Employee Stock Purchase Plan Maximum Number of Shares that May be Purchase by Eligible Participants
Employee Stock Purchase Plan Maximum Number of Shares that May be Purchase by Eligible Participants
Proceeds from employee stock purchase plan
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Schedule of Other Liabilities
Schedule of Other Assets and Other Liabilities [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Operating Segments
Operating Segments [Member]
Corporate and Reconciling Items
Corporate And Reconciling Items [Member]
Corporate And Reconciling Items [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenues
Revenues
Operating income (loss)
Operating Income (Loss)
Money market funds at carrying value
Money Market Funds, at Carrying Value
Cash surrender value of life insurance
Cash Surrender Value of Life Insurance
Long-term debt carrying amount
Long-term Debt
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period [Domain]
Redemption period one
Debt Instrument, Redemption, Period One [Member]
Redemption period two
Debt Instrument, Redemption, Period Two [Member]
Redemption period three
Debt Instrument, Redemption, Period Three [Member]
Repayments of short-term debt
Repayments of Short-term Debt
Debt instrument, fixed interest rate
Debt Instrument, Interest Rate, Stated Percentage
Issue price, percent
Debt Instrument, Issue Price, Percent
Debt Instrument, Issue Price, Percent
Redeemable percentage of principal amount
Debt Instrument, Redemption Price, Percentage of Principal Amount That May Be Redeemed
Debt Instrument, Redemption Price, Percentage of Principal Amount That May Be Redeemed
Redemption price percentage
Debt Instrument, Redemption Price, Percentage
VALUATION AND QUALIFYING ACCOUNTS
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule of Cash and Cash Equivalents
Schedule of Cash and Cash Equivalents [Table Text Block]
Schedule of Restricted Cash
Restrictions on Cash and Cash Equivalents [Table Text Block]
Schedule of Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Expected dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected stock price 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
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Operating lease cost
Operating Lease, Cost
Variable lease cost
Variable Lease, Cost
Sublease income
Sublease Income
Total lease cost, net
Lease, Cost
Cash paid for amounts included in the measurement of operating lease liabilities
Operating Lease, Payments
Cash receipts from sublease arrangements
Proceeds from Lease Payments
Right-of-use assets obtained in exchange for new operating lease liabilities
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Weighted average remaining lease term for operating leases
Operating Lease, Weighted Average Remaining Lease Term
Weighted average discount rate for operating leases
Operating Lease, Weighted Average Discount Rate, Percent
Cost of subleasing activities
Operating Lease, Cost, Subleasing Activities
Operating Lease, Cost, Subleasing Activities
GOODWILL AND INTANGIBLE ASSETS
Goodwill and Intangible Assets Disclosure [Text Block]
Title of Individual [Axis]
Title of Individual [Axis]
Title of Individual [Domain]
Title of Individual [Domain]
Executives
Executive Officer [Member]
Non-executive employees
Non Executive [Member]
-- None. No documentation exists for this element. --
Restricted Stock Units (RSUs)
Vested and released (in shares)
Vested and released
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Released in Period.
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Per Share Weighted Average Grant Date Fair Value
Vested and released (in dollars per share)
Vested and released (in Dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Vested And Released In Period Weighted Average Grant Date Fair Value.
Forfeited (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
Performance shares, target performance percentage
Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Target Performance Percentage
Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Target Performance Percentage
Performance share, actual yielded performance, percent
Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Actual Performance Percentage
Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Actual Performance Percentage
Weighted average remaining contractual term
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Domain]
Timing of Transfer of Good or Service [Domain]
Transferred over time
Transferred over Time [Member]
Transferred at a point in time
Transferred at Point in Time [Member]
Amortization of intangibles
Amortization of Intangible Assets
Finite-Lived Intangible Assets, Estimated Future Amortization Expense
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2023
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2024
Finite-Lived Intangible Assets, Amortization Expense, Year Five
2025 and thereafter
Finite-Lived Intangible Assets, Amortization Expense, after Year Five
Finite-lived intangible assets, net
Finite-Lived Intangible Assets, Net
Economic Development Loan 1
Economic Development Loan 1 [Member]
Economic Development Loan 1 [Member]
Economic Development Loan 2
Economic Development Loan 2 [Member]
Economic Development Loan 2 [Member]
Interest rate at period end
Line of Credit Facility, Interest Rate at Period End
Floating eurodollar base rate
Floating Eurodollar Base Rate
Floating Euro Dollar Base Rate
Additional interest above base rate
Debt Instrument, Additional Interest above Base Rate
Debt Instrument, Additional Interest above Base Rate
Line of credit facility, remaining borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Number of loans
Number Of Debt Instruments
Number Of Debt Instruments
Proceeds from borrowings
Proceeds from Issuance of Long-term Debt
Deferred payment term
Debt Instrument, Payment Terms, Period Principal Payments are Deferred
Debt Instrument, Payment Terms, Period Principal Payments are Deferred
Possible forgiveness of principal
Debt Instrument, Possible Forgiveness
Debt Instrument, Possible Forgiveness
Debt forgiveness period
Debt Instrument, Possible Forgiveness, Period
Debt Instrument, Possible Forgiveness, Period
Weighted average annual effective rate
Debt Instrument, Interest Rate During Period
Long-term Debt, Fiscal Year Maturity
Long-term Debt, Fiscal Year Maturity [Abstract]
2020
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
2021
Long-term Debt, Maturities, Repayments of Principal in Year Two
2022
Long-term Debt, Maturities, Repayments of Principal in Year Three
2023
Long-term Debt, Maturities, Repayments of Principal in Year Four
Thereafter
Long-Term Debt, Maturities, Repayments Of Principal After Year Four
Long-Term Debt, Maturities, Repayments Of Principal After Year Four
Write off of deferred financing fees
Write off of Deferred Debt Issuance Cost
Payments of deferred financing fees
Payments of Debt Issuance Costs
Aggregate purchase price
Deferred consideration
Business Combination, Deferred Consideration
Business Combination, Deferred Consideration
Future compensation expense (up to)
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Consideration transferred, cash paid
Entity number of employees
Entity Number of Employees
Acquisition and integration charges
Business Combination, Acquisition and Integration Related Costs
Business Combination, Acquisition and Integration Related Costs
Exit costs
Business Combination, Acquisition and Integration Related Costs, Exit Costs, Liability
Business Combination, Acquisition and Integration Related Costs, Exit Costs, Liability
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Recognition of actuarial loss
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit
Total defined benefit pension expense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Business Combination, Separately Recognized Transactions [Table]
Business Combination, Separately Recognized Transactions [Table]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Separately Recognized Transactions [Line Items]
Liability Related to Exited Space [Roll Forward]
Business Combination Separately Recognized Transactions, Liabilities Recognized [Roll Forward]
Business Combination Separately Recognized Transactions, Liabilities Recognized [Roll Forward]
Liability balance at beginning of the year
Business Combination, Separately Recognized Transactions, Liabilities Recognized
Charges and adjustments
Business Combination, Separately Recognized Transactions, Charges And Adjustments, Net
Business Combination, Separately Recognized Transactions, Charges And Adjustments, Net
Payments
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized
Liability balance at end of the year
Sublease income
Business Combination, Separately Recognized Transactions, Sublease Income
Business Combination, Separately Recognized Transactions, Sublease Income
Accrued liabilities
Expense accruals
Deferred tax assets accrued expenses
Operating leases
Deferred Tax Assets, Leasing Arrangements
Deferred Tax Assets, Leasing Arrangements
Loss and credit carryforwards
Loss and credit carryforwards
Deferred tax assets operating loss and tax credit carryforwards
Assets relating to equity compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Other assets
Deferred Tax Assets, Other
Gross deferred tax assets
Deferred Tax Assets, Gross
Property, equipment and leasehold improvements
Deferred Tax Liabilities Depreciation
Deferred tax liabilities depreciation
Intangible assets
Deferred Tax Liabilities, Goodwill and Intangible Assets
Prepaid expenses
Deferred Tax Liabilities, Prepaid Expenses
Other liabilities
Deferred Tax Liabilities, Other
Gross deferred tax liabilities
Deferred Tax Liabilities, Gross
Valuation allowance
Deferred Tax Assets, Valuation Allowance
Net deferred tax liabilities
Deferred Tax Liabilities, Net
Unvested
Unvested [Member]
-- None. No documentation exists for this element. --
SARs
Exercised (in shares)
Exercised (in Shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercises in Period.
Vested and exercisable, ending balance (in shares)
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Vested and Exercisable, Number
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Vested and Exercisable, Number
Per Share Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Exercise Price [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Exercise Price [Roll Forward]
Outstanding, Beginning Balance (in dollars per share)
Per Share Weighted- Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Exercise Price.
Granted (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Exercise Price.
Forfeited (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Forfeitures In Period, Weighted Average Exercise Price
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Forfeitures In Period, Weighted Average Exercise Price
Exercised (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercises In Period Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercises in Period, Weighted Average Exercise Price.
Outstanding, Ending Balance (in dollars per share)
Vested and exercisable, ending balance (in Dollars per share)
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price.
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price.
Exercised (in Dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercises In Period Weighted Average Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Exercises In Period, Weighted Average Grant Date Fair Value.
Vested and exercisable, ending balance (in Dollars per share)
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Vested, Expected to Vest, and Exercisable, Weighted Average Grant Date Fair Value.
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Exercisable, Weighted Average Grant Date Fair Value.
Weighted Average Remaining Contractual Term (Years)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Remaining Contractual Term [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Remaining Contractual Term [Roll Forward]
Weighted average remaining contractual terms
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Term
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Term 1.
Granted
Weighted average remaining contractual terms vested and exercisable
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Exercisable Weighted Average Remaining Contractual Term.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Exercisable Weighted Average Remaining Contractual Term.
Unvested SARs (in shares)
Aggregate intrinsic value of outstanding shares
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Intrinsic Value.
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Intrinsic Value.
Aggregate intrinsic value of shares vested and exercisable
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other Than Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value.
Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other Than Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value.
Statement of Financial Position [Abstract]
Fees receivable, allowances
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized
Preferred Stock, Shares Authorized
Preferred stock, shares issued
Preferred Stock, Shares Issued
Preferred stock, shares outstanding
Preferred Stock, Shares Outstanding
Common stock, shares authorized
Common Stock, Shares Authorized
Common stock, shares issued
Common Stock, Shares, Issued
Treasury stock, shares
Treasury Stock, Shares
OTHER ASSETS
Other Assets Disclosure [Text Block]
ACQUISITIONS AND DIVESTITURE
Mergers, Acquisitions and Dispositions Disclosures [Text Block]
BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]
Accounts payable
Accounts Payable, Current
Payroll and employee benefits payable
Employee-related Liabilities, Current
Severance and retention bonus payable
Severance and Retention Bonus Payable
Severance and Retention Bonus Payable
Bonus payable
Accrued Bonuses, Current
Commissions payable
Accrued Sales Commission, Current
Taxes payable
Taxes Payable, Current
Current portion of operating lease liabilities
Operating Lease, Liability, Current
Other accrued liabilities
Other Accrued Liabilities, Current
Total accounts payable and accrued liabilities
Accounts Payable and Accrued Liabilities, Current
Schedule of Reconciliation of the Basic and Diluted Earnings Per Share Computations
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Income Statement [Abstract]
Statement [Table]
Statement [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Research
Research Revenue [Member]
Research Revenue
Statement [Line Items]
Statement [Line Items]
Revenues:
Revenues [Abstract]
Costs and expenses:
Costs and Expenses [Abstract]
Cost of services and product development
Cost of Goods and Services Sold
Selling, general and administrative
Selling, General and Administrative Expense
Depreciation
Total costs and expenses
Costs and Expenses
Operating income (loss)
Interest income
Interest Income, Operating
Interest expense
Interest Expense
(Loss) gain from divested operations
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax
Other income, net
Other Nonoperating Income (Expense)
Income (loss) before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Provision (benefit) for income taxes
Net income
Net income per share:
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Weighted average shares outstanding:
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Summary of the allocation of the purchase price to the fair value of the assets and liabilities assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of aggregate purchase price for acquisitions
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of pro forma financial information
Business Acquisition, Pro Forma Information [Table Text Block]
Summary of accrual for exit costs
Business Combination, Separately Recognized Transactions [Table Text Block]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount
Additions Charged to Expense
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense
Additions Charged Against Revenues
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account
Deductions from the Reserve
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction
Reclassification to Accounts Payable and Accrued Liabilities
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment
Balance at End of Year
Schedule of changes to the carrying amount of goodwill by segment
Schedule of Intangible Assets and Goodwill [Table Text Block]
Schedule of changes in finite-lived intangible assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of estimated future amortization expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING
Derivative Instruments and Hedging Activities Disclosure [Text Block]
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Fees receivable, net of allowances of $8,000 and $7,700, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Deferred commissions
Other Deferred Costs, Net
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property, equipment and leasehold improvements, net
Property, Plant and Equipment, Net
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Other assets
Other Assets, Noncurrent
Total Assets
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable and accrued liabilities
Deferred revenues
Deferred Revenue, Current
Current portion of long-term debt
Long-term Debt, Current Maturities
Total current liabilities
Liabilities, Current
Long-term debt, net of deferred financing fees
Long-term Debt, Excluding Current Maturities
Operating lease liabilities
Operating Lease, Liability, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Total Liabilities
Stockholders’ Equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock:
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
$0.01 par value, authorized 5,000,000 shares; none issued or outstanding
Preferred Stock, Value, Issued
Common stock:
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
$0.0005 par value, 250,000,000 shares authorized; 163,602,067 shares issued for both periods
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital
Accumulated other comprehensive loss, net
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated earnings
Retained Earnings (Accumulated Deficit)
Treasury stock, at cost, 74,444,288 and 73,899,977 common shares, respectively
Treasury Stock, Value
Total Stockholders’ Equity
Stockholders' Equity Attributable to Parent
Total Liabilities and Stockholders’ Equity
Liabilities and Equity
Accounts payable and accrued liabilities
Total operating lease liabilities per the Consolidated Balance Sheet
Leases not yet commenced, undiscounted lease payments
Lessee, Operating Lease, Lease Not Yet Commenced, Payments Due
Lessee, Operating Lease, Lease Not Yet Commenced, Payments Due
Leases not yet commenced, term
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract
Statement of Cash Flows [Abstract]
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, Nonproduction
Stock-based compensation expense
Share-based Payment Arrangement, Noncash Expense
Deferred taxes
Deferred Income Taxes and Tax Credits
Loss (gain) from divested operations
Gain on sale of an equity security
Reduction in the carrying amount of operating lease right-of-use assets
Operating Lease, Right-Of-Use Asset, Reduction In Carrying Amount
Operating Lease, Right-Of-Use Asset, Reduction In Carrying Amount
Amortization and write-off of deferred financing fees
Amortization of Debt Issuance Costs
Changes in assets and liabilities, net of acquisitions and divestitures:
Changes in assets and liabilities: [Abstract]
-- None. No documentation exists for this element. --
Fees receivable, net
Increase (Decrease) in Accounts Receivable
Deferred commissions
Increase (Decrease) in Deferred Charges
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Other assets
Increase (Decrease) in Other Operating Assets
Deferred revenues
Increase (Decrease) in Deferred Revenue
Accounts payable and accrued and other liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Additions to property, equipment and leasehold improvements
Payments for Capital Improvements
Acquisitions - cash paid (net of cash acquired)
Divestitures - cash received (net of cash transferred)
Proceeds from Divestiture of Businesses, Net of Cash Divested
Cash (used in) provided by investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments for deferred financing fees
Payments on borrowings
Repayments of Long-term Debt
Purchases of treasury stock
Cash (used in) provided by financing activities
Net Cash Provided by (Used in) Financing Activities
Net increase (decrease) in cash and cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
Effects of exchange rates on cash and cash equivalents and restricted cash
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and cash equivalents and restricted cash, beginning of year
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and cash equivalents and restricted cash, end of year
Supplemental disclosures of cash flow information:
Supplemental Cash Flow Information [Abstract]
Cash paid during the year for:
Cash paid during the period for: [Abstract]
-- None. No documentation exists for this element. --
Interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Income taxes, net of refunds received
Income Taxes Paid, Net
REVENUE AND RELATED MATTERS
Revenue from Contract with Customer [Text Block]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]
Derivative Instruments, Gain (Loss) [Table]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Interest (income) expense, net
Interest Expense [Member]
Other expense (income), net
Other Income And Expense [Member]
-- None. No documentation exists for this element. --
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Total (income) expense, net
Stock-based compensation expense
Share-based Payment Arrangement, Expense
Statement of Stockholders' Equity [Abstract]
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance
Adoption of ASU
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Issuances under stock plans and for an acquisition
Stock Issued During Period, Value, Share-Based Compensation And Acquisitions
Stock Issued During Period, Value, Share-Based Compensation And Acquisitions
Issuances under stock plans
Shares Issued, Value, Share-based Payment Arrangement, before Forfeiture
Common share repurchases
Stock Repurchased During Period, Value
Stock-based compensation expense
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Ending Balance
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Statutory tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
State income taxes, net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Effect of non-U.S. operations
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Intercompany sale of intellectual property
Effective Income Tax Rate Reconciliation, Intercompany Sale Of Intellectual Property, Percent
Effective Income Tax Rate Reconciliation, Intercompany Sale Of Intellectual Property, Percent
Change in the reserve for tax contingencies
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent
Law changes
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent
Stock-based compensation expense
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Percent
Nondeductible acquisition costs
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
Nondeductible meals and entertainment costs
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent
Gains/Losses on divested operations and held-for-sale assets
Effective Income Tax Rate Reconciliation, Disposition of Business, Percent
Limitation on executive compensation
Effective Income Tax Rate Reconciliation, Limitation Of Executive Compensation, Percent
Effective Income Tax Rate Reconciliation, Limitation Of Executive Compensation, Percent
Global intangible low-taxed income, net of foreign tax credits
Effective Income Tax Rate Reconciliation, Global Intangible Low-Taxed Income, Net Of Foreign Tax Credits
Effective Income Tax Rate Reconciliation, Global Intangible Low-Taxed Income, Net Of Foreign Tax Credits
Foreign-derived intangible income
Effective Income Tax Rate Reconciliation, Foreign-Derived Intangible Income, Percent
Effective Income Tax Rate Reconciliation, Foreign-Derived Intangible Income, Percent
Change in the valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Goodwill
Effective Income Tax Rate Reconciliation, Deduction, Other, Percent
Other items, net
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Schedule of Notional Amounts of Outstanding Derivative Positions
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance
Derivative Instruments, Gain (Loss) [Table Text Block]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other liabilities
Other Liabilities [Member]
Other current assets
Other Current Assets [Member]
Accrued liabilities
Accrued Liabilities Current [Member]
-- None. No documentation exists for this element. --
Interest rate swaps
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Designated as hedging instrument
Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Number of Contracts
Derivative, Number of Instruments Held
Notional Amounts
Derivative, Notional Amount
Fair Value Asset (Liability), Net
Derivative Assets (Liabilities), at Fair Value, Net
Unrealized Loss Recorded in AOCI/L
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Unrealized Loss Recorded in AOCI/L
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Segments
Segment Reporting, Policy [Policy Text Block]
Basis of presentation
Basis of Accounting, Policy [Policy Text Block]
Principles of consolidation
Consolidation, Policy [Policy Text Block]
Use of estimates
Use of Estimates, Policy [Policy Text Block]
Business acquisitions
Business Combinations Policy [Policy Text Block]
Revenue recognition
Revenue [Policy Text Block]
Allowance for losses
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]
Cost of services and product development
Research and Development Expense, Policy [Policy Text Block]
Selling, general and administrative
Selling, General and Administrative Expenses, Policy [Policy Text Block]
Commissions expense
Commissions Expense, Policy [Policy Text Block]
Stock-based compensation expense
Share-based Payment Arrangement [Policy Text Block]
Income taxes
Income Tax, Policy [Policy Text Block]
Cash and cash equivalents and restricted cash
Cash and Cash Equivalents, Policy [Policy Text Block]
Leases
Lessee, Leases [Policy Text Block]
Property, equipment and leasehold improvements
Property, Plant and Equipment, Policy [Policy Text Block]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Finite-Lived Intangible assets
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
Impairment of long-lived assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Pension obligations
Pension and Other Postretirement Plans, Policy [Policy Text Block]
Debt
Debt, Policy [Policy Text Block]
Foreign currency exposure
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Fair value disclosures
Fair Value of Financial Instruments, Policy [Policy Text Block]
Concentrations of credit risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Stock repurchase programs
Repurchase and Resale Agreements Policy [Policy Text Block]
Adoption of new accounting standards
New Accounting Pronouncements, Policy [Policy Text Block]
Schedule of Segment Reporting Information by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Reconciliation of Segment Gross Contribution to Net Income
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Schedule of Revenue from External Customers and Long-Lived Assets by Geographical Areas
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
EMPLOYEE BENEFITS
Pension and Other Postretirement Benefits Disclosure [Text Block]
Income Tax [Table]
Income Tax [Table]
Nature of Expense [Axis]
Nature of Expense [Axis]
Interim Period, Costs Not Allocable [Domain]
Interim Period, Costs Not Allocable [Domain]
Benefit (expense) relating to interest rate swaps used to increase (decrease) equity
Benefit Expense Relating To Interest Rate Swap Used To Increase Decrease Equity [Member]
Benefit (Expense) Relating to Interest Rate Swap Used to Increase (Decrease) Equity
Benefit from stock transactions with employees used to increase equity
Benefit From Stock Transactions With Employees Used To Increase Equity [Member]
Benefit from stock transactions with employees used to increase equity
Benefit relating to defined-benefit pension adjustments used to increase equity
Benefit Expense Relating To Defined Benefit Pension Adjustments Used To Increase Decrease Equity [Member]
-- None. No documentation exists for this element. --
Income Tax [Line Items]
[Line Items] Income Tax [Table]
Current tax expense:
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 tax (benefit) expense:
Deferred tax (benefit) expense: [Abstract]
-- None. No documentation exists for this element. --
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
Deferred Income Tax Expense (Benefit)
Total current and deferred
Income Tax Expense (Benefit) before Other
Income Tax Expense (Benefit) before Other
Other tax benefit (expense)
Other Tax Expense (Benefit)
Total tax expense (benefit)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Restricted cash classified in:
Restricted Cash [Abstract]
Prepaid expenses and other current assets
Restricted Cash, Current
Other assets
Restricted Cash, Noncurrent
Cash classified as held-for-sale
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents
Cash and cash equivalents and restricted cash per the Consolidated Statements of Cash Flows
Weighted-average discount rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Expected return on plan assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets
Average compensation increase
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Schedule of Components of Defined Benefit Pension Expense
Schedule of Net Benefit Costs [Table Text Block]
Schedule of Assumptions Used in the Computation of Pension Expense
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]
Schedule of Changes in the Projected Benefit Obligation
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
Schedule of Funded Status of the Plans and Related Amounts Recorded in Consolidated Balance Sheet
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
Schedule of Defined Benefit Pension Plans Assets
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
UNITED STATES
UNITED STATES
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Percentage of lease payments
Operating Leases, Concentration Percentage Of Payments
Operating Leases, Concentration Percentage Of Payments
Operating Lease Payments
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months
2021
Lessee, Operating Lease, Liability, Payments, Due Year Two
2022
Lessee, Operating Lease, Liability, Payments, Due Year Three
2023
Lessee, Operating Lease, Liability, Payments, Due Year Four
2024
Lessee, Operating Lease, Liability, Payments, Due Year Five
Thereafter
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Total future minimum operating lease payments
Lessee, Operating Lease, Liability, Payments, Due
Imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Total operating lease liabilities per the Consolidated Balance Sheet
Sublease Cash Receipts
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
2020
Lessor, Operating Lease, Payments to be Received, Next Twelve Months
2021
Lessor, Operating Lease, Payments to be Received, Two Years
2022
Lessor, Operating Lease, Payments to be Received, Three Years
2023
Lessor, Operating Lease, Payments to be Received, Four Years
2024
Lessor, Operating Lease, Payments to be Received, Five Years
Thereafter
Lessor, Operating Lease, Payments to be Received, Thereafter
Total future estimated sublease cash receipts
Lessor, Operating Lease, Payments to be Received
LEASES
Lessee, Operating Leases [Text Block]
LEASES
Lessee, Finance Leases [Text Block]
STOCKHOLDERS’ EQUITY
Stockholders' Equity Note Disclosure [Text Block]
Percent of target bonus charges allocated to segments
Segment Reporting Information, Percent of Target Bonus Charges Allocated to Segments
Segment Reporting Information, Percent of Target Bonus Charges Allocated to Segments
Schedule of Components of Income before Income Taxes
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Reconciliation of Beginning and Ending Unrecognized Tax Benefits
Summary of Income Tax Contingencies [Table Text Block]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Pension plan assets at the beginning of the year
Company contributions
Defined Benefit Plan, Plan Assets, Contributions by Employer
Benefit payments
Defined Benefit Plan, Plan Assets, Benefits Paid
Actual return on plan assets
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)
Contractual termination benefits
Defined Benefit Plan, Plan Assets, Payment for Settlement
Foreign currency impact
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)
Pension plan assets at the end of the year
Schedule of Transactions Relating to Common Stock
Schedule of Stock by Class [Table Text Block]
Schedule of Accumulated Other Comprehensive (Loss) Income, Net by Components
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated Other Comprehensive (Loss) Income [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
AOCI Attributable to Parent
Interest Rate Swaps
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Defined Benefit Pension Plans
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Foreign Currency Translation Adjustments
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss) activity during the year:
Other Comprehensive Income (Loss) Net of Tax, Period Change [Abstract]
Change in AOCI/L before reclassifications to income
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Reclassifications from AOCI/L to income
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Other comprehensive (loss) income, net of tax
Non-current deferred revenues
Deferred Revenue, Noncurrent
Long-term taxes payable
Long-term taxes payable
Carrying value as of the balance sheet of long-term obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. For classified balance sheets, used to reflect the current portion of the liabilities (due in greater than one year or one operating cycle).
Benefit plan-related liabilities
Liability, Defined Benefit Pension Plan, Noncurrent
Lease-related matters prior to the adoption of ASU No. 2016-02
Lease Related Liability, Noncurrent
Lease Related Liability, Noncurrent
Non-current deferred tax liabilities
Deferred Income Tax Liabilities, Net
Other, including fair value of interest rate swap contracts
Other Liabilities Noncurrent Other
Other liabilities noncurrent other
Total other liabilities
Derivative [Table]
Derivative [Table]
Interest rate swap
Derivative [Line Items]
Derivative [Line Items]
Number of contracts
Contract notional amount
Derivative, fixed interest rate
Derivative, Fixed Interest Rate
Derivative, term of contract
Derivative, Term of Contract
Interest rate derivative hedge, asset (liability), net
Interest Rate Fair Value Hedge Derivative at Fair Value, Net
Prepaid expenses and other current assets
Property, equipment and leasehold improvements
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Other assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Liabilities:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities [Abstract]
Accounts payable and accrued liabilities
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accounts Payable And Accrued Liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable and Accrued Liabilities
Deferred revenues (current)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue
Other liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Total liabilities
Schedule of Disaggregation of Revenue by Reportable Segment
Revenue from External Customers by Geographic Areas [Table Text Block]
Schedule of Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Schedule for Contract with Customer, Asset and Liability
Contract with Customer, Asset and Liability [Table Text Block]
Income Tax [Table]
Other assets
Other Assets [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
State and local jurisdiction
State and Local Jurisdiction [Member]
Foreign Tax Authority
Foreign Tax Authority [Member]
Period [Axis]
Period [Axis]
Period [Axis]
Period [Domain]
Period [Domain]
-- None. No documentation exists for this element. --
Expire within one to five years
Expire Within One To Five Years [Member]
-- None. No documentation exists for this element. --
Expire within six to fifteen years
Expire Within Six To Fifteen Years [Member]
-- None. No documentation exists for this element. --
Expire within sixteen to twenty years
Expire Within Sixteen To Twenty Years [Member]
Expire Within Sixteen To Twenty Years [Member]
Expire over next twenty years
Expire Over Next Twenty Years [Member]
-- None. No documentation exists for this element. --
Carried forward indefinitely
Carried Forward Indefinitely [Member]
-- None. No documentation exists for this element. --
Income Tax [Line Items]
Non-current deferred tax assets
Deferred Income Tax Assets, Net
Valuation allowance
Operating loss carryforwards
Operating Loss Carryforwards
Operating loss carryforwards expiration period
Operating Loss Carryforwards Expiration Period
Operating loss carryforwards expiration period
Tax credit carryforwards
Tax Credit Carryforward, Amount
Tax credit carryforwards, expiration period
Tax Credit Carryforward, Expiration Period
Tax Credit Carryforward, Expiration Period
Benefits of future tax deductions for amortization
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Amount
Tax act, provisional tax expense
Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit)
Tax act, provisional amount of one-time transition tax liability
Tax Cuts and Jobs Act, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Liability
Unrecognized tax benefits
Unrecognized tax benefits reductions resulting from anticipated closure of audits and the expiration of certain statutes of limitation
Unrecognized Tax Benefits, Reductions Resulting from Settlements with Taxing Authorities and Lapse of Applicable Statute of Limitations
Unrecognized Tax Benefits, Reductions Resulting from Settlements with Taxing Authorities and Lapse of Applicable Statute of Limitations.
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Unrecognized tax benefits that would result adjustments to other tax accounts
Unrecognized Tax Benefits that Would Result Adjustments to Other Tax Accounts
Unrecognized Tax Benefits that Would Result Adjustments to Other Tax Accounts
Income tax penalties and interest expense
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense
Income tax examination, penalties and interest expense
Income Tax Examination, Penalties and Interest Expense
Accumulated undistributed earnings of non-US subsidiaries
Undistributed Earnings of Foreign Subsidiaries
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
U.S.
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Non-U.S.
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Income (loss) before income taxes
Results of Operations, Income before Income Taxes
STOCK-BASED COMPENSATION
Share-based Payment Arrangement [Text Block]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Cost of services and product development
Cost of Sales [Member]
Selling, general and administrative
Selling, General and Administrative Expenses [Member]
Acquisition and integration charges
Acquisition and Integration Charges [Member]
Acquisition and Integration Charges [Member]
Retirement Eligible Employees Equity Award
Retirement Eligible Employees Equity Award [Member]
-- None. No documentation exists for this element. --
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Europe, Middle East and Africa
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:
Long-lived assets: (1) [Abstract]
-- None. No documentation exists for this element. --
Long-lived assets
Long-Lived Assets
Benefit plan-related assets
Assets for Plan Benefits, Defined Benefit Plan
Other
Other Assets, Miscellaneous, Noncurrent
Total other assets
Schedule of Assets and Liabilities Measured to Fair Value on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Maximum annual contribution per employee, amount
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount
Defined contribution plan cost recognized
Defined Contribution Plan, Cost
Deferred compensation plan assets
Deferred Compensation Plan Assets
Deferred compensation liability
Deferred Compensation Liability, Classified, Noncurrent
Compensation expense related to deferred compensation plan
Deferred Compensation Arrangement with Individual, Compensation Expense
Other assets
Defined Benefit Plan, Reinsurance Asset
Defined Benefit Plan, Reinsurance Asset
ACCOUNTS PAYABLE AND ACCRUED AND OTHER LIABILITIES
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Software
Computer Software, Intangible Asset [Member]
Other
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets [Roll Forward]
Gross cost
Finite-Lived Intangible Assets, Gross
Additions due to acquisitions
Finite-lived Intangible Assets Acquired
Intangible assets fully amortized
Finite-Lived Intangible Assets, Fully Amortized Intangibles
Finite-Lived Intangible Assets, Fully Amortized Intangibles
Divestitures
Finite-Lived Intangible Assets, Divestitures
Finite-Lived Intangible Assets, Divestitures
Foreign currency translation impact and other
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)
Gross cost
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Remaining amortization period
Finite-Lived Intangible Asset, Useful Life
Numerator:
Numerator: [Abstract]
-- None. No documentation exists for this element. --
Net income used for calculating basic and diluted income per common share
Denominator:
Denominator: (1) [Abstract]
-- None. No documentation exists for this element. --
Weighted average common shares used in the calculation of basic income per share (in shares)
Common stock equivalents associated with stock-based compensation plans (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Shares used in the calculation of diluted income per share (in shares)
Income per share:
Earnings Per Share, Basic and Diluted [Abstract]
Sale of intellectual property, income tax benefit (in dollars per share)
Income Tax Reconciliation, Disposition Of Assets, Income Tax Expense (Benefit), Per Share
Income Tax Reconciliation, Disposition Of Assets, Income Tax Expense (Benefit), Per Share
Tax act, income tax benefit (in dollars per share)
Effective Income Tax Rate Reconciliation,Tax Cuts And Jobs Act Of 2017, Income Tax Expense (Benefit), Per Share
Effective Income Tax Rate Reconciliation,Tax Cuts And Jobs Act Of 2017, Income Tax Expense (Benefit), Per Share
COMPUTATION OF EARNINGS PER SHARE
Earnings Per Share [Text Block]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses:
Depreciation and amortization
Depreciation, Depletion and Amortization
Interest expense and other, net
Interest Expense and Other Nonoperating Income
Interest Expense and Other Nonoperating Income
(Loss) gain from divested operations
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax
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]
Computer equipment and software
Furniture and equipment
Equipment And Furniture [Member]
Equipment and Furniture [Member]
Leasehold improvements
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Useful Life
Property, Plant and Equipment, Useful Life
Property, equipment and leasehold improvements, gross
Property, Plant and Equipment, Gross
Less — accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, equipment and leasehold improvements, net