Organization, Consolidation and Presentation of Financial Statements [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Allowance, Credit Loss SEC Schedule, 12-09, Allowance, Credit Loss [Member] Allowance for Sales Credit Memos SEC Schedule, 12-09, Allowance, Sales Credit Memos [Member] SEC Schedule, 12-09, Allowance, Sales Credit Memos [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Beginning balance SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Charge (credit) to costs and expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Write-offs and other SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Translation adjustments Valuation Allowances and Reserves, Translation Adjustments Valuation Allowances and Reserves, Translation Adjustments Ending balance Segment Reporting [Abstract] Business Segments and International Operations Segment Reporting Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements within the Fair Value Hierarchy of the Financial Assets Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurements, Nonrecurring Fair Value Measurements, Nonrecurring [Table Text Block] Earnings Per Share [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive impact from common stock equivalents (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic Diluted earnings (loss) per share (in dollars per share) Earnings Per Share, Diluted Investments and Cash [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, After Year One, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, After Year One, Fair Value Total Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Commitments and Contingencies Disclosure [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 Operating Leases, Future Minimum Payments Due Equity [Abstract] Shareholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Cash, Cash Equivalents and Investments Cash, Cash Equivalents, and Short-term Investments [Text Block] 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] Equity Award [Domain] Equity Award [Domain] Deferred Stock Unit Deferred Stock Unit [Member] Deferred Stock Unit [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Deferred stock units, shares outstanding (in shares) Shares, Outstanding Deferred stock unit of common stock (in shares) Deferred Stock Units Equal To Common Stock Deferred stock units equal to common stock Shares forfeited during period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Common stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Common stock repurchased and retired, value (in dollars) Stock Repurchased and Retired During Period, Value Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Cash dividends declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Cash dividends, increase (as a percent) Common Stock, Dividends, Percentage Increase Common Stock, Dividends, Percentage Increase Dividends paid Dividends, Common Stock, Cash Number of shares excluded from the calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Future Minimum Rental Payments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Restructuring Charges [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Accrued Liabilities Other Liabilities [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] 2017 Restructuring Activities 2017 Restructuring Activities [Member] 2017 Restructuring Activities [Member] 2016 Restructuring Activities 2016 Restructuring Activities [Member] 2016 Restructuring Activities [Member] 2012 - 2015 Restructuring Activities 2012 - 2015 Restructuring Activities [Member] 2012 - 2015 Restructuring Activities [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Percentage of reduction of global workforce (more than) Restructuring and Related Cost, Number of Positions Eliminated, Period Percent Restructuring expenses Restructuring Charges Short-term restructuring reserves Restructuring Reserve, Current Quarterly Financial Information Disclosure [Abstract] Selected Quarterly Financial Data Quarterly Financial Information [Table Text Block] Statement of Comprehensive Income [Abstract] Unrealized gain (loss) on investments, net of tax provision (benefit) Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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] 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 Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Including Stock Swap Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Including Stock Swap Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Ending balance (in shares) Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Vested or expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment 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Outstanding, Weighted Average Remaining Contractual Term Options outstanding, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Vested or expected to vest, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share price (in dollars per share) Share Price Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized (Losses) Gains on Investments Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Total AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Balance, beginning of year Stockholders' Equity Attributable to Parent Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Total other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Balance, end of year Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09, Excess Tax Benefit Component Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance, beginning of year (in shares) Issuance of stock under employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of stock under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Vesting of restricted stock units and release of deferred stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of restricted stock units and release of deferred stock units Stock Issued During Period, Value, Restricted Stock Award, Gross Withholding tax payments related to net issuance of restricted stock units (in shares) Shares Paid for Tax Withholding for Share Based Compensation Withholding tax payments related to net issuance of restricted stock units Adjustments Related to Tax Withholding for Share-based Compensation Tax benefit arising from employee stock purchase plan, stock options and restricted share activity Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Adjustment due to adoption of ASU 2016-09 Cumulative Effect of New Accounting Principle in Period of Adoption Dividends declared Dividends Treasury stock repurchases and retirements (in shares) Treasury stock repurchases and retirements Other comprehensive income (loss), net of tax Balance, end of year (in shares) Retirement Benefits [Abstract] Company contributions to the plan Defined Contribution Plan, Employer Discretionary Contribution Amount Property, Plant and Equipment [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer equipment and software Computer Equipment [Member] Land, buildings and leasehold improvements Land, Buildings and Improvements [Member] Furniture and fixtures Furniture and Fixtures [Member] Capitalized software development costs Software and Software Development Costs [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less 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 Depreciation, Depletion and Amortization Nature of Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Excess Facilities and Other Costs Facility Closing [Member] Employee Severance and Related 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available for grant under stock plans (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Number of plans for which shareholder approval not required Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans for which Shareholder Approval Not Required Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans for which Shareholder Approval Not Required Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Number of common stock shares each restricted stock unit represents (in shares) Restricted Stock Unit Equal To Number Of Common Stock Share Restricted stock unit equal to number of common stock share. Stock-based compensation service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Number of performance metrics Share-based Compensation Arrangement by Share-based Payment Award, Number of Performance Metrics Share-based Compensation Arrangement by Share-based Payment Award, Number of Performance Metrics Percentage of shares based on market conditions Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Market Condition of Total Shareholder Return Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Market Condition of Total Shareholder Return Market condition period Share-based Compensation Arrangement by Share-based Payment Award, Award Market Condition Period Share-based Compensation Arrangement by Share-based Payment Award, Award Market Condition Period Percentage of shares based on cumulative performance condition Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Cumulative Performance Condition Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Cumulative Performance Condition ESPP offering period Employee Stock Purchase Plan Offering Period Employee stock purchase plan offering period ESPP number of purchase periods Employee Stock Purchase Plan Purchase Periods Employee Stock Purchase Plan Purchase Periods ESPP purchase period Share-based Compensation Arrangement by Share-based Payment Award, Purchase Of Offering, Period Share-based Compensation Arrangement by Share-based Payment Award, Purchase Of Offering, Period ESPP purchase price (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Employee stock purchase plan, issued shares (in shares) Weighted average purchase price of shares (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased Shares available and reserved for issuance (in shares) Shares Available And Reserved For Issuance Under Employee Stock Purchase Plan Shares available and reserved for issuance under employee stock purchase plan Weighted average estimated fair value of options granted, per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Unrecognized stock-based compensation expense, net of expected forfeitures Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Costs are expected to be recognized, weighted average period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Number of executives whose employment was terminated Number Of Executives Employment Terminated Number of executives employment terminated Additional stock-based compensation expenses related to separation and acceleration vesting Additional Stock-Based Compensation Expenses Related To Separation And Acceleration Vesting Additional stock-based compensation expenses related to separation and acceleration vesting Document And Entity Information [Abstract] Document And Entity Information Abstract. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type 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 Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company 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 Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Technology Officer Chief Technology Officer [Member] Chief Technology Officer [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Might Meeting, Inc. 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[Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Acquisition of Affiliated Entity Acquisition of Affiliated Entity [Member] Acquisition of Affiliated Entity [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Equity interests (as a percent) Business Acquisition, Percentage of Voting Interests Acquired Consideration transferred Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred Intangible assets recognized Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Deferred tax liability assumed Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liability Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liability Deferred tax liability amortization period Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liability, Amortization Period Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liability, Amortization Period Cash, Cash Equivalents and Investments [Table] Cash, Cash Equivalents And Investments [Table] Cash, Cash Equivalents And Investments [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash Cash [Member] Money market funds Money Market Funds [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] State and municipal bond obligations Municipal Bonds [Member] U.S. treasury bonds US Treasury Securities [Member] Corporate bonds Corporate Debt Securities [Member] Cash, Cash Equivalents and Investments [Line Items] Cash, Cash Equivalents And Investments [Line Items] Cash Cash Equivalents And Investments [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Amortized Cost Basis Debt Securities, Available-for-sale, Amortized Cost Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Debt Securities, Available-for-sale Cash Cash Equivalents And Investments Cost Basis Cash Cash Equivalents And Investments Cost Basis Cash, Cash Equivalents, And Investments, Cost Basis. Cash Cash Equivalents And Investments At Fair Value Cash Cash Equivalents And Investments At Fair Value Cash Cash Equivalents and Investments at Fair Value Summary of Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Status of Restricted Stock Units Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Fair Value of Options and Employee Stock Purchase Plan Shares Granted, Weighted Average Assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Stock Options and Stock Awards Activity Stock Options And Stock Awards Activity [Table Text Block] Stock Options And Stock Awards Activity [Table Text Block] Classification of Stock-Based Compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] United States UNITED STATES Canada CANADA EMEA EMEA [Member] Latin America Latin America [Member] Asia Pacific Asia Pacific [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Retirement Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Allowances Against Accounts Receivable Schedule Of Allowances Against Accounts Receivable [Table Text Block] Schedule Of Allowances Against Accounts Receivable [Table Text Block] Schedule of Activity in Allowance for Sales Credit Memos Schedule of Activity in Allowance for Sales [Table Text Block] Schedule of Activity in Allowance for Sales [Table Text Block] Accumulated Other Comprehensive (Loss) Income Schedule of 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Income, Amount Nondeductible stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Meals and entertainment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Amount Compensation subject to 162(m) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Compensation Expense, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Compensation Expense, Amount Uncertain tax positions and tax settlements Effective Income Tax Rate Reconciliation, Tax Contingency and Tax Settlement, Amount Effective Income Tax Rate Reconciliation, Tax Contingency and Tax Settlement, Amount Remeasurement of net deferred tax liabilities due to the Act Tax Cuts And Jobs Act Of 2017 Change In Tax Rate Deferred Tax Liability Income Tax Benefit Tax Cuts And Jobs Act Of 2017 Change In Tax Rate Deferred Tax Liability Income Tax Benefit Net excess tax benefit or detriment from stock-based compensation plans Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Prior period adjustment Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Release of valuation allowance on state research and development credits Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Goodwill Impairment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Restructuring Restructuring and Related Activities Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Software licenses Software Licenses [Member] Software Licenses [Member] Maintenance Maintenance [Member] Services Service [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Asset impairment charges Impairment of Long-Lived Assets to be Disposed of Goodwill and Intangible Assets Disclosure [Abstract] 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 Total Finite-Lived Intangible Assets, Net Accounting Principles Basis of Accounting, Policy [Policy Text Block] Basis of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Cash Equivalents and Investments Cash Equivalents And Investments [Policy Text Block] Cash Equivalents And Investments Allowance for 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Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Advertising Costs Advertising Costs, Policy [Policy Text Block] Warranty Costs Standard Product Warranty, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Acquisition-Related Costs Acquisition-Related Costs [Policy Text Block] Acquisition-Related Costs [Policy Text Block] Restructuring Charges Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Revenue from External Customers by Revenue Type Revenue from External Customers by Products and Services [Table Text Block] Revenue from External Customers from Different Geographical Areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] 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] Purchased technology Computer Software, Intangible Asset [Member] Trade name Trade Names [Member] Customer relationships Customer Relationships [Member] Kinvey, Inc. Kinvey, Inc. [Member] Kinvey, Inc. [Member] DataRPM Corporation DataRPM Corporation [Member] DataRPM Corporation [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Net working capital Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities in Excess of Current Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities in Excess of Current Assets Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Net deferred tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Deferred taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Goodwill Goodwill Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Acquired intangible assets, Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Customer-related Trademarks and trade names Trademarks and Trade Names [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Debt Disclosure [Abstract] Term Loan and Line of Credit Debt Disclosure [Text Block] Business Combinations Business Combination Disclosure [Text Block] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] U.S. Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Total Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Cash Cash and Equivalents Short-Term Investments Short-term Investments Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Short-term investments Total cash, cash equivalents and short-term investments Cash, Cash Equivalents, and Short-term Investments Accounts receivable (less allowances of $710 in 2018 and $676 in 2017) Accounts Receivable, Net, Current Other current assets Other Assets, Current Assets held for sale Total current assets Assets, Current Property and equipment, net Intangible assets, net Goodwill Deferred tax assets Deferred Income Tax Assets, Net Other assets Other Assets, Noncurrent Total assets Assets Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of long-term debt, net Long-term Debt, Current Maturities Accounts payable Accounts Payable, Current Accrued compensation and related taxes Employee-related Liabilities, Current Dividends payable to shareholders Dividends Payable, Current Income taxes payable Accrued Income Taxes, Current Other accrued liabilities Other Accrued Liabilities, Current Short-term deferred revenue Contract with Customer, Liability, Current Total current liabilities Liabilities, Current Long-term debt, net Long-term Debt, Excluding Current Maturities Long-term deferred revenue Contract with Customer, Liability, Noncurrent Deferred tax liabilities Deferred Income Tax Liabilities, Net Other noncurrent liabilities Other Liabilities, Noncurrent Commitments and contingencies (Note 9) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; authorized, 10,000,000 shares; issued, none Preferred Stock, Value, Issued Common stock, $0.01 par value, and additional paid-in capital; authorized, 200,000,000 shares; issued and outstanding, 45,114,935 shares in 2018 and 47,281,035 shares in 2017 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Total liabilities and shareholders’ equity Liabilities and Equity Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Adjustments for Error Corrections [Axis] Adjustments for Error Corrections [Axis] Adjustments for Error Correction [Domain] Adjustments for Error Correction [Domain] Out of Period Tax Adjustment Adjustment for Error Correction [Member] Adjustment for Error Correction [Member] Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal and Foreign Federal and Foreign Jurisdiction [Member] Federal and Foreign Jurisdiction [Member] Indefinite-Lived Carryforwards Indefinite Lived Carryforwards [Member] Indefinite-Lived Carryforwards [Member] State State and Local Jurisdiction [Member] Federal Domestic Tax Authority [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Income tax expense (benefit) Income tax benefit due to the re-measurement of its net U.S. deferred tax liabilities due to the Act Decrease in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Net operating loss carryforwards Operating Loss Carryforwards Tax credit carryforwards Tax Credit Carryforward, Amount Cumulative undistributed foreign earnings Cumulative Undistributed Foreign Earnings Cumulative undistributed foreign earnings Unrecognized tax benefits Unrecognized Tax Benefits Deferred tax assets related to operating loss carryforwards, not recorded Deferred Tax Assets, Operating Loss Carryforwards, Foreign and Domestic Deferred Tax Assets, Operating Loss Carryforwards, Foreign and Domestic Income tax benefit recorded to as a result of interest and penalties Income Tax Expense (Benefit) Recorded As A Result Of Interest And Penalties Income Tax Expense (Benefit) Recorded As A Result Of Interest And Penalties Interest and penalties recorded to provision for income taxes Income Tax Examination, Penalties and Interest Expense Reduction related to statue of expiration due to interest and penalties Income Tax Examination, Reduction Resulting from Lapse of Applicable Statute of Limitations Due To Interest And Penalties Income Tax Examination, Reduction Resulting from Lapse of Applicable Statute of Limitations Due To Interest And Penalties Accrued estimated interest and penalties Income Tax Examination, Penalties and Interest Accrued Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Swing Line Loans Swing Line Loans [Member] Swing Line Loans [Member] Letter of Credit Letter of Credit [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Credit Agreement Maturing November 2022 Credit Agreement Maturing November 2022 [Member] Credit Agreement Maturing November 2022 [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Term loan Debt Instrument, Face Amount Unsecured credit facility Line of Credit Facility, Maximum Borrowing Capacity Additional borrowing capacity available Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Amount due in next twelve months Line of Credit, Current Principal repayments per eight payment schedules Long-term Debt, Maturities, Principal Repayments Per Eight Payment Schedules Long-term Debt, Maturities, Principal Repayments Per Eight Payment Schedules Principal repayments per four payment schedules, option one Long-term Debt, Maturities, Principal Repayments Per Four Payment Schedules, Option One Long-term Debt, Maturities, Principal Repayments Per Four Payment Schedules, Option One Principal repayments per four payment schedules, option two Long-term Debt, Maturities, Principal Repayments Per Four Payment Schedules, Option Two Long-term Debt, Maturities, Principal Repayments Per Four Payment Schedules, Option Two Principal repayments per three payment schedules Long-term Debt, Maturities, Principal Repayments Per Three Payment Schedules Long-term Debt, Maturities, Principal Repayments Per Three Payment Schedules Average interest rate during period (as a percent) Line of Credit Facility, Interest Rate During Period Interest rate at end period (as a percent) Line of Credit Facility, Interest Rate at Period End Debt issuance cost Debt Issuance Costs, Gross Amortization of debt issuance costs Amortization of Debt Issuance Costs Line of credit facility outstanding amount Long-term Line of Credit 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] Cost of maintenance and services Cost Of Maintenance And Services [Member] Cost of maintenance and services. Sales and marketing Product development Research and Development Expense [Member] General and administrative 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] Total stock-based compensation Allocated Share-based Compensation Expense Income tax benefit included in the provision for income taxes from continuing operations Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Fair Value Measurements Fair Value Disclosures [Text Block] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Held-for-sale Discontinued Operations, Held-for-sale [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] Loss on assets held for sale Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average 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 Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Intangible Assets and Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] 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 Issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled (in shares) 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 [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, beginning of year (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 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 Weighted average grant date fair value, Issued (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 Weighted average grant date fair value, Canceled (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 Weighted average grant date fair value, end of year (in dollars per share) Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative Instrument [Axis] Derivative, Name [Domain] Derivative Contract [Domain] Forward contracts to sell U.S. dollars Foreign Currency Forward Contracts To Sell U S Dollars [Member] Foreign Currency Forward Contracts to Sell U.S. Dollars [Member] Forward contracts to purchase U.S. dollars Foreign Currency Forward Contracts To Purchase U S Dollars [Member] Foreign Currency Forward Contracts to Purchase U.S. Dollars [Member] Derivative [Line Items] Derivative [Line Items] Derivative contracts, notional value Derivative Asset, Notional Amount Derivative contracts, fair value Derivative Liability, Fair Value, Gross Liability Summary of Cash, Cash Equivalents and Trading and Available-for-sale Investments Cash, Cash Equivalents and Investments [Table Text Block] Summary of Cash, Cash Equivalents and Trading and Available-for-sale Investments by Balance Sheet Classification Schedule of cash cash equivalents and available for sale investments by major security type classified on balance sheet Table Text Block Schedule of cash, cash equivalents and available for sale investments by major security type classified on balance sheet. Fair Value of Debt Securities by Contractual Maturity Debt Securities, Available-for-sale [Table Text Block] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [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] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Application Development and Deployment Application Development and Deployment [Member] Application Development and Deployment [Member] Modulus Modulus [Member] Modulus [Member] Accounting Standards Update 2016-09 Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-16 Accounting Standards Update 2016-16 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Buildings and Improvements Building and Building Improvements [Member] Internal Use Software Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Number of independent software vendors, more than Number of Independent Software Vendors Number of Independent Software Vendors Number of enterprise customers, more than Number of Enterprise Customers Number of Enterprise Customers Number of developers, more than Number of Developers Number of Developers Useful lives of major asset Property, Plant and Equipment, Useful Life Capitalized software development costs Capitalized Computer Software, Gross Amortization Amortization Impairment of goodwill and intangible assets Goodwill, Impairment Loss Impairment of software development costs Impairment of Intangible Assets, Finite-lived Advertising costs Advertising Expense Acquisition-related expenses Business Combination, Acquisition Related Costs Restructuring related costs Restructuring Costs Excess tax benefits related to share based compensation Cumulative effect adjustment Other assets, noncurrent Revenue Net income Diluted earnings per share (in dollars per share) Components Of Pretax Income Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Provisions For Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation Of U.S. Federal Statutory Rate To Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Summary Of Deferred Taxes Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Reconciliation Of Unrecognized Tax Benefits Summary of Income Tax Contingencies [Table Text Block] Summary of Restructuring Activity Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] OpenEdge OpenEdge [Member] OpenEdge [Member] Data Connectivity and Integration Data Connectivity And Integration [Member] Data Connectivity And Integration Application Development and Deployment 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] Total costs of revenue and operating expenses Operating Costs and Expenses Total contribution margin Contribution Profit (Loss) Contribution Profit (Loss) Other unallocated expenses Other Unallocated Expenses Other Unallocated Expenses Income (loss) from operations Operating Income (Loss) Other expense, net Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Schedule of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Future Amortization Expense From Intangible Assets Held Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Summary of Changes In The Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Earnings (Loss) Per Share Earnings Per Share [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) 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 of property and equipment Depreciation Amortization of acquired intangibles and other Stock-based compensation Share-based Compensation Loss on disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Impairment of goodwill and intangible assets Impairment of Long-lived Assets and Goodwill Impairment of Long-lived Assets and Goodwill Deferred income taxes Increase (Decrease) in Deferred Income Taxes Excess tax benefit from stock plans Excess Tax Benefit from Share-based Compensation, Operating Activities Allowances for bad debt and sales credits Provision for Doubtful Accounts Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Other assets Increase (Decrease) in Other Operating Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income taxes payable Increase (Decrease) in Income Taxes Payable Deferred revenue Increase (Decrease) in Contract with Customer, Liability Net cash flows from operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from (used in) investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of investments Payments to Acquire Investments Sales and maturities of investments Proceeds from Sale, Maturity and Collection of Investments Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Payments for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sale of property, plant and equipment, net Proceeds from Sale of Property, Plant, and Equipment Net cash flows from (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows used in financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from stock-based compensation plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Payments for taxes related to net share settlements of equity awards Payments Related to Tax Withholding for Share-based Compensation Repurchases of common stock Payments for Repurchase of Common Stock Dividend payments to shareholders Payments of Dividends Excess tax benefit from stock plans Excess Tax Benefit from Share-based Compensation, Financing Activities Payment of principal on long-term debt Repayments of Long-term Debt Payment of issuance costs for long-term debt Payments of Debt Issuance Costs Net cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Supplemental disclosure: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes, net of refunds of $909 in 2018, $3,997 in 2017, and $1,379 in 2016 Income Taxes Paid, Net Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Non-cash investing and financing activities: Other Noncash Investing and Financing Items [Abstract] Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested Dividends declared Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Statement [Abstract] Software licenses Maintenance and services Maintenance and Services [Member] Maintenance and Services [Member] Amortization of acquired intangibles Amortization Of Acquired Intangibles [Member] Amortization Of Acquired Intangibles [Member] Revenue: Revenues [Abstract] Costs of revenue: Cost of Goods and Services Sold [Abstract] Total costs of revenue Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Product development Research and Development Expense, Software (Excluding Acquired in Process Cost) General and administrative General and Administrative Expense Impairment of goodwill and intangible assets Goodwill and Intangible Asset Impairment Amortization of acquired intangibles Amortization of Acquired Intangible Assets1 Amortization of Acquired Intangible Assets Fees related to shareholder activist Professional Fees Restructuring expense Total operating expenses Operating Expenses Other (expense) income: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income and other, net Other Nonoperating Income (Expense) Foreign currency loss, net Foreign Currency Transaction Gain (Loss), before Tax Total other expense, net Provision for income taxes Net income (loss) Earnings (loss) per share: Basic (in dollars per share) Diluted (in dollars per share) Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Selected Quarterly Financial Data (unaudited) Quarterly Financial Information [Text Block] Other comprehensive income (loss), 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, Portion Attributable to Parent Unrealized gain (loss) on investments, net of tax provision (benefit) of $57 in 2018, ($60) in 2017, and ($53) in 2016 Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Related Party Transactions Related Party Transactions Disclosure [Text Block] Other Current Assets Other Current Assets [Member] Other Accrued Liabilities Other Current Liabilities [Member] Other Assets Other Assets [Member] Forward Contracts Forward Contracts [Member] Minimum maturity period, foreign currency derivative Minimum Remaining Maturity of Foreign Currency Derivatives Minimum Remaining Maturity of Foreign Currency Derivatives Maximum maturity period, foreign currency derivative Maximum Remaining Maturity of Foreign Currency Derivatives Derivative liabilities Gains (losses) on foreign currency option contracts Derivative, Gain (Loss) on Derivative, Net Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Intangible assets, amortization expense Amortization of Intangible Assets Impairment of intangible assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Calculation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] OpenEdge Data Connectivity and Integration Goodwill [Roll Forward] Goodwill [Roll Forward] Balance, beginning of year Additions Goodwill, Acquired During Period Translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Balance, end of year Revenue Gross profit Income (loss) from operations Reconciliation of Unrecognized Tax Benefits [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance, beginning of year Tax positions related to current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Tax positions related to a prior period Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Tax positions related to a prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Settlements with tax authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Lapses due to expiration of the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Balance, end of year 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 Total Long-term Debt Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Total purchase consideration Business Combination, Consideration Transferred Purchase consideration, contingent consideration Business Combination, Contingent Consideration, Liability Period for founder to remain with company (at least) Business Combination, Period For Founder To Remain With Company Business Combination, Period For Founder To Remain With Company Consideration payable in the form of restricted stock units Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Allowances on accounts receivable Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Common stock, par value (in dollars per share) Common stock, shares authorized (in shares) Common stock, shares issued (in shares) Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Rent expense, net of sub-rental income Operating Leases, Rent Expense, Net Deferred tax assets: Components of Deferred Tax Assets [Abstract] Accounts receivable Deferred Tax Assets Deferred Expenses, Account Receivable Deferred tax assets deferred expenses, account receivable. Other assets Deferred Tax Assets Tax Deferred Expense Other Current Assets Deferred tax assets tax deferred expense other current assets Accrued compensation Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Compensation Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Compensation Accrued liabilities and other Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred revenue Deferred Tax Assets, Deferred Income Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Tax credit and loss carryforwards Deferred Tax Assets, Tax Credit Carryforwards Gross deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Goodwill Deferred Tax Liabilities, Goodwill Unrealized FX gains Deferred Tax Liabilities, Unrealized Currency Transaction Gains Depreciation and amortization Deferred Tax Liabilities Depreciation And amortization Depreciation and amortization Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Total deferred tax liabilities Deferred Tax Liabilities, Gross Total deferred tax liabilities, net Deferred Tax Liabilities, Net Proceeds from income tax refunds Proceeds from Income Tax Refunds