Line of Credit Facility [Abstract] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Investments and Cash [Abstract] Cash, Cash Equivalents and Investments Cash, Cash Equivalents, and Marketable Securities [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] Statement of Cash Flows [Abstract] Proceeds from income tax refunds Proceeds from Income Tax Refunds 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 Fair Value, Available For Sale Debt Securities, Contractual Maturity [Table Text Block] Fair Value, Available For Sale Debt Securities, Contractual Maturity [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, Portion Attributable to Parent Unrealized gains on investments, net of tax provision of $18 and $57 for the third quarter and first nine months of 2018, respectively and $17 and $62 for the third quarter and first nine months of 2017, respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Total 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 Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [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] Customer-related Customer Relationships [Member] 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 Net Book Value Finite-Lived Intangible Assets, Net Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Short-term Investments Total cash, cash equivalents and short-term investments Cash, Cash Equivalents, and Short-term Investments Accounts receivable (less allowances of $701 and $676, respectively) Accounts Receivable, Net, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill 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 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, 45,133,361 shares in 2018 and 47,281,035 shares in 2017 Common Stocks, Including 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 Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Term Loan and Line of Credit Debt Disclosure [Text Block] Segment Reporting [Abstract] 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 Products and Services 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] Restructuring Charges [Abstract] Restructuring Charges Restructuring and Related Activities Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [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] Equity Award [Domain] Equity Award [Domain] Long-Term Incentive Plan (LTIP) Long-Term Incentive Plan (LTIP) [Member] Long-Term Incentive Plan (LTIP) [Member] Options Employee Stock Option [Member] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Award 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 Stock-based compensation award service period (in years) 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 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 Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Market Condition of Total Shareholder Return 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 Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] 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 Benefits Employee Severance [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Beginning Balance Restructuring Reserve Costs incurred Restructuring Charges Cash disbursements Payments for Restructuring Translation adjustments and other Restructuring Reserve, Foreign Currency Translation Gain (Loss) Ending Balance Allowance for accounts receivable Allowance for Doubtful Accounts Receivable, Current Stockholders' Equity: 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) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] 2017 Restructuring Activities 2017 Restructuring Activities [Member] 2017 Restructuring Activities [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other accrued liabilities Other Liabilities [Member] Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Global workforce reduction (as a percent) (over) Restructuring and Related Cost, Number of Positions Eliminated, Period Percent Restructuring expense Short-term portion of restructuring reserve Restructuring Reserve, Current Long-term portion of restructuring reserve Restructuring Reserve, Noncurrent Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of maintenance and services Cost Of Maintenance And Services [Member] Cost of maintenance and services. Sales and marketing Selling and Marketing Expense [Member] Product development Product Development [Member] Product Development [Member] General and administrative General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Stock-based compensation expense Allocated Share-based Compensation Expense Income Tax Disclosure [Abstract] Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Adjustments for Error Corrections [Axis] Adjustments for Error Corrections [Axis] Adjustments for Error Correction [Domain] Adjustments for Error Correction [Domain] Adjustment for Error Correction Adjustment for Error Correction [Member] Adjustment for Error Correction [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Provisional tax benefit Income Tax Expense (Benefit) Derivative Instruments and Hedging Activities Disclosure [Abstract] 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] Notional Value Derivative, Notional Amount Fair Value Derivative, Fair Value, Net Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation and Significant Accounting Policies Basis of Accounting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Other Current 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 Derivative Liability, Fair Value, Gross Liability Loss (gain) on foreign currency forward contracts Derivative, Gain (Loss) on Derivative, Net Income Taxes Income Tax Disclosure [Text Block] Remainder of 2018 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Kinvey, Inc. Kinvey, Inc. [Member] Kinvey, Inc. [Member] DataRPM Corporation DataRPM Corporation [Member] DataRPM Corporation [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Total purchase consideration Business Combination, Consideration Transferred Amount held back as an incentive to founder Business Combination, Contingent Consideration, Liability Period for founder to stay with company following acquisition (at least) Business Combination, Contingent Consideration, Period for Recognition Business Combination, Contingent Consideration, Period for Recognition Goodwill Consideration payable in form of restricted stock units Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Intangible Assets and Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Equity [Abstract] Schedule of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Earnings Per Share [Abstract] Earnings per share Earnings Per Share [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] OpenEdge OpenEdge [Member] OpenEdge [Member] Data Connectivity and Integration Data Connectivity [Member] Data Connectivity [Member] Application Development and Deployment Application Development and Deployment [Member] Application Development and Deployment [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Balance, November 30, 2017 Translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Balance, August 31, 2018 Tax provision included in accumulated unrealized losses on investments Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Business Combinations Business Combination 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] Total revenue Revenues 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] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Number of shares excluded from the calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [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 Equivalents Short-Term Investments Intangible assets, amortization expense Amortization of Intangible Assets Income Statement [Abstract] Statement [Table] Statement [Table] Software licenses Maintenance and services Maintenance and Services [Member] Maintenance and Services [Member] Statement [Line Items] Statement [Line Items] Revenue: Revenues [Abstract] Costs of revenue: Cost of Revenue [Abstract] Cost of maintenance and services Cost, Maintenance Amortization of acquired intangibles Cost, Amortization 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 Amortization of acquired intangibles Amortization of Acquired Intangible Assets1 Amortization of Acquired Intangible Assets Fees related to shareholder activist Professional Fees Acquisition-related expenses Business Combination, Acquisition Related Costs Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Other (expense) income, net: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income and other, net Other Nonoperating Income (Expense) Foreign currency (loss) gain, net Foreign Currency Transaction Gain (Loss), before Tax Total other (expense) income, net Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Net income Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Earnings per share: Basic (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Cash dividends declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Number of investments in continuous unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions 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] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll 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Common stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Common stock repurchased and retired Stock Repurchased and Retired During Period, Value Stock repurchase authorization Stock Repurchase Program, Authorized Amount Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Purchased technology Trade name Trade Names [Member] Customer relationships 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 Finite-lived 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 Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Finite-lived intangible assets, useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Document And Entity Information [Abstract] Document And Entity Information Abstract. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Line of Credit Facility [Table] Line of Credit Facility [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving line of credit Revolving Credit Facility [Member] Swing line loans Swing Line Loans [Member] Swing Line Loans [Member] Letter of credit Letter of Credit [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 Fair value of term loan Line of Credit Facility, Fair Value of Amount Outstanding Due in next 12 months Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Principal payments for year one Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year One Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year One Principal payments for year two Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Two Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Two Principal payments for year three Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Three Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Three Principal payments for year four Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Four Long-term Debt, Maturities, Periodic Payment, Repayment of Principal in Year Four Interest rate of credit facilities 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 Remainder of 2018 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Total Long-term Debt Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Summary of Restructuring Activity Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Money market funds State and municipal bond obligations U.S. treasury bonds Corporate bonds Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Foreign exchange derivatives Foreign Exchange Contract [Member] 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] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair value of financial assets Assets, Fair Value Disclosure Foreign exchange derivatives Financial and Nonfinancial Liabilities, Fair Value Disclosure Cash, Cash Equivalents and Investments [Table] Cash, Cash Equivalents And Investments [Table] Cash, Cash Equivalents And Investments [Table] Cash Amortized Cost Basis Cash Cash Equivalents And Investments Cost Basis Cash, Cash Equivalents, And Investments, Cost Basis. 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 Cash Cash Equivalents And Investments At Fair Value Cash Cash Equivalents and Investments at Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Classification of Stock-Based Compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Outstanding Foreign Currency Forward Contracts Schedule of Derivative Instruments [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] North America North America [Member] 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] Segment revenue New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Retained Earnings Retained Earnings [Member] 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] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Number of independent software vendors Number of Independent Software Vendors Number of Independent Software Vendors Number of enterprise customers Number of Enterprise Customers Number of Enterprise Customers Number of developers Number of Developers Number of Developers Cumulative effect of new accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Due in one year or less Fair Value Of Debt Securities Maturities Within One Year Fair value of debt securities maturities within one year. Due after one year Fair Value Of Debt Securities Maturities After One Year Fair value of debt securities maturities after one year. 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