Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Total non cancellable purchase commitments Unrecorded Unconditional Purchase Obligation Royalty expense recorded under cost of license and other revenue Royalty Expense Compensation Related Costs [Abstract] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Marketable Securities, Current Marketable Securities, Current [Member] Marketable Securities, Current [Member] Fair Value, Assets and Liabilities Measured on a Recurring Basis Axis Fair Value, Assets and Liabilities Measured on a Recurring Basis [Axis] Fair Value, Assets and Liabilities Measured on a Recurring Basis Axis Fair Value Assets, by Type [Domain] Fair Value Assets, by Type [Domain] Fair Value Assets, by Type [Domain] Rabbi Trust Rabbi Trust Member Rabbi Trust Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Marketable securities Marketable Securities Trading securities Trading Securities Deferred compensation liability current Deferred Compensation Liability, Current Deferred compensation liability non-current Deferred Compensation Liability, Classified, Noncurrent Compensation and Retirement Disclosure [Abstract] Funded percentage Defined Benefit Plan, Funded Percentage Accumulated benefit obligation Defined Benefit Plan, Accumulated 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(Loss) Ending Balance Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year [Abstract] Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year [Abstract] Amortization of prior service credit Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit) Amortization of the net loss Defined Benefit Plan, Future Amortization of Gain (Loss) Total amortization Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year Segment Reporting [Abstract] Segments Segment Reporting Disclosure [Text Block] Accounting Policies [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Software and Software Development Costs Software and Software Development Costs [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Abstract] Useful Life Property, Plant and Equipment, Useful Life Depreciation Depreciation Computer hardware, at cost Computer Hardware Gross Computer Hardware, Gross Computer software, at cost Capitalized Computer Software, Gross Leasehold improvements, land and buildings, at cost Building And Leasehold Improvements Gross Carrying amount at the balance sheet date of long-lived, depreciable assets that include building structures held for productive use including any addition, improvement, or renovation to the structure as well as the addition of improvements to assets held under lease arrangements. Furniture and equipment, at cost Furniture and Fixtures, Gross Computer software, hardware, leasehold improvements, furniture, and equipment, at cost Property, Plant and Equipment, Gross Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Computer software, hardware, leasehold improvements, furniture, and equipment, net Property, Plant and Equipment, Net Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] 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] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign Exchange Contracts Foreign Exchange Contract [Member] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement Location [Domain] Net revenue Sales [Member] Operating expenses Operating Expense [Member] Interest and other expense, net Interest and other income (expense), net [member] Interest Income (Expense), Net Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Amount of gain recognized in accumulated other comprehensive income on derivatives (effective portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount and location of gain reclassified from accumulated other comprehensive income into income (effective portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount and location of (loss) gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Amount and location of (loss) gain recognized in income on derivatives Derivative, Gain (Loss) on Derivative, Net 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] Customer Relationships, Trade Names, Patents, and User List Customer Relationships, Trade Names, Patents, and User List [Member] Customer Relationships, Trade Names, Patents, and User List [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived 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Cumulative Effect of New Accounting Principle in Period of Adoption Accumulated deficit Retained Earnings (Accumulated Deficit) Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Restructuring and Related Activities [Abstract] Schedule of Restructuring Reserve by Type of Cost Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Statement of Financial Position [Abstract] 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 Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common 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Available-for-sale Securities Available-for-sale Securities [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Numerator: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Net (loss) income Net Income (Loss) Attributable to Parent Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator for basic net (loss) income per share—weighted average shares Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for dilutive net (loss) income per 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shares remained available for repurchase under repurchase plans (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Additional shares authorized for repurchase (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Statement of Comprehensive Income [Abstract] Other comprehensive loss, net of reclassifications: Other Comprehensive Income (Loss), Net of Tax [Abstract] Net (loss) gain on derivative instruments (net of tax effect of ($1.1), $0.6, and ($0.7)) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in net unrealized gain (loss) on available-for-sale securities (net of tax effect of ($0.5), $0.0, and ($0.2)) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Change in defined benefit pension items (net of tax effect of ($0.9), $0.9, and $1.8) Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Net change in cumulative foreign currency translation loss (net of tax effect of $0.2, $0.5, and $4.9) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Beginning projected benefit obligation Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Actuarial loss (gain) Defined Benefit Plan, Actuarial Gain (Loss) Benefits paid Defined Benefit Plan, Benefits Paid Foreign currency exchange rate changes Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) Curtailments and settlements Defined Benefit Plan, Curtailments and Settlements, Benefit Obligation Defined Benefit Plan, Curtailments and Settlements, Benefit Obligation Contributions by plan participants Defined Benefit Plan, Contributions by Plan Participants Ending projected benefit obligation Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Beginning fair value of plan assets Defined Benefit Plan, Fair Value of Plan Assets Actual return on plan assets Defined Benefit Plan, Actual Return on Plan Assets Contributions paid by employer Defined Benefit Plan, Contributions by Employer Contributions paid by plan participants Benefit payments Curtailments and settlements Defined Benefit Plan, Curtailments and Settlements, Plan Assets Defined Benefit Plan, Curtailments and Settlements, Plan Assets Foreign currency exchange rate changes Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets Ending fair value of plan assets Funded status Defined Benefit Plan, Funded Status of Plan Interest and investment expense, net Interest and Investments Expense, Net Interest and Investments Expense, Net Loss on foreign currency Foreign Currency Transaction Gain (Loss), before Tax Gain (loss) on strategic investments (Loss) Gain on Strategic Investments (Loss) Gain on Strategic Investments Other income Other Nonoperating Income (Expense) Interest and other expense, net Interest Income (Expense), Net 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] Gross unrecognized tax benefits at the beginning of the fiscal year Unrecognized Tax Benefits Increases for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Increases for tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Decreases relating to settlements with taxing authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Reductions as a result of lapse of the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Gross unrecognized tax benefits at the end of the fiscal year Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalent [Domain] Cash and Cash Equivalents [Domain] Agency bonds US Government Agencies Debt Securities [Member] Certificates of deposit Certificates of Deposit [Member] Commercial 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Securities, Accumulated Gross Unrealized Loss, before Tax Trading Securities, Accumulated Gross Unrealized Loss, before Tax Trading Securities Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Fair Value Convertible Debt Securities, Fair Value Disclosure Convertible Debt Securities, Fair Value Disclosure Derivative Instruments And Hedges at Amortized Cost Derivative Instruments And Hedges, Net Derivative Instruments And Hedges, Net Unrealized Gain on Foreign Currency Derivatives Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Unrealized Loss on Foreign Currency Derivatives Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative Contracts, Fair Value Derivative Contracts, Fair Value Disclosure Derivative Contracts, Fair Value Disclosure Amortized Cost Securities Amortized Cost Securities Amortized Cost Securities Unrealized Gain on Securities Securities, Accumulated Gross Unrealized Gain, before Tax Securities, Accumulated Gross Unrealized Gain, before Tax Unrealized Loss on Securities Securities, Accumulated Gross Unrealized Loss, before Tax Securities, Accumulated Gross Unrealized Loss, before Tax Total Assets, Fair Value Disclosure Business and Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Income tax provision (benefit) at U.S. Federal statutory rate Effective Income Tax Rate Reconciliation at 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Pronouncement Tax effect of non-deductible stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Stock compensation windfall shortfall Effective Income Tax Rate Reconciliation, Stock Compensation Windfall Shortfall Effective Income Tax Rate Reconciliation, Stock Compensation Windfall Shortfall Research and development tax credit benefit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Closure of income tax audits and changes in uncertain tax positions Income Tax Reconciliation Uncertain Tax Positions The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to closure of income tax audits and changes in uncertain tax positions. Tax effect of officer compensation in excess of $1.0 million Income Tax Reconciliation Officer Compensation Income Tax Reconciliation, Officer Compensation Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income tax expense Income Tax Expense (Benefit) Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] 2018 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2020 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2021 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2022 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2023-2027 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter Accumulated Other Comprehensive Income (loss) [Abstract] Accumulated Other Comprehensive Income (loss) [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated other comprehensive (loss) income AOCI Attributable to Parent [Member] Net Unrealized Gains (Losses) on Available for Sale Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Defined Benefit Pension Components Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Beginning Balance Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Pre-tax (gains) losses reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Tax effects Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Ending Balance 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] Award Type [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) Restricted Stock Units (RSUs) and Performance Shares [Member] Restricted Stock Units (RSUs) and Performance Shares [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unreleased restricted stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested restricted stock units at January 31, 2016 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share Based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Released in Period The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement. Canceled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Performance adjustment (in shares) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Adjustments In Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period Unvested restricted stock at January 31, 2017 (in shares) 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] Beginning balance of unvested restricted stock units (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 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the target award, minimum Defined Benefit Plan, Target Plan Asset Allocations Range Minimum Percentage of the target award, maximum Defined Benefit Plan, Target Plan Asset Allocations Range Maximum Interest and Other (Expense) Income, net Interest and Other Income [Table Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Marketable securities Marketable Securities, Current Accounts receivable, net Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Marketable securities Marketable Securities, Noncurrent Computer equipment, software, furniture, and leasehold improvements, net Developed technologies, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Deferred income taxes, net Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND 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at January 31, 2017 and 2016 Preferred Stock, Value, Issued Common stock and additional paid-in capital, $0.01 par value; shares authorized 750.0; 220.3 outstanding at January 31, 2017 and 224.4 outstanding at January 31, 2016 Common Stocks, Including Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Total liabilities and stockholders' equity Liabilities and Equity Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [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] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Investment, 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Units (PSUs) Performance Shares [Member] Employee Stock Plan 2012 Employee Stock Plan 2012 [Member] Employee Stock Plan 2012 [Member] Directors stock plan 2012 Directors stock plan 2012 [Member] Directors stock plan 2012 [Member] Outside directors stock plan 2012 Outside directors stock plan 2012 [Member] Outside directors stock plan 2012 [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Year One Share-based Compensation Award, Tranche One [Member] Year Two Share-based Compensation Award, Tranche Two [Member] Year Three Share-based Compensation Award, Tranche Three [Member] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Number of Active Stock Plans Number of Active Stock Plans Number of Active Stock Plans Number of Expired Plans Number of Expired Plans Number of Expired Plans Number of additional share authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Shares of common stock reserved for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Restricted stock award, net of forfeitures (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Shares forfeited (in shares) Stock Issued During Period, Shares, Share-based Compensation, Forfeited Shares granted to shares issued (in shares) Share-Based Compensation Shares Granted to Share Issued Share-Based Compensation Shares Granted to Share Issued Grants in period, net of forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share based payment award options expiration term (in years) Share based compensation arrangement by share based payment award options expiration term Share based compensation arrangement by share based payment award options expiration term Shares available for future issuance (in shares) Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Granted (in dollars per share) Fair value of units vested in period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Restricted stock granted (in shares) Share based compensation expense, restricted stock units Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Total compensation cost related to non-vested awards not yet recognized Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Shares Employee Service Share based Compensation, Unrecognized Compensation Costs on Nonvested Restricted Shares Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Number of awards granted but unreleased Vesting percentage (up to percentage) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Percentage of compensation that eligible employees can use to purchase common stock, maximum Employee Stock Purchase Plan Maximum Percentage Of Compensation To Purchase Shares By Eligible Participants Employee Stock Purchase Plan, Maximum Percentage of Compensation to Purchase Shares By Eligible Participants Percentage of fair market value eligible employees can purchase common stock, minimum Employee Stock Purchase Plan Minimum Percentage Of Common Stock Fair Value Defined To Purchase Shares By Eligible Participants Employee Stock Purchase Plan, Minimum Percentage of Common Stock Fair Value Defined to Purchase Shares By Eligible Participants Number 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Percentage Calculation Shares issued under the ESP plan (in dollars per share) Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares issued under the ESP Plan, average price (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Shares Issued Average Price Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued, Average Price Weighted average grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Employee Service Share Based Compensation recognized Compensation Costs On Nonvested Restricted Shares Employee Service Share Based Compensation recognized Compensation Costs On Nonvested Restricted Shares Employee Service Share Based Compensation recognized Compensation Costs On Nonvested Restricted Shares