Earnings Per Share [Abstract] NET INCOME PER SHARE Earnings Per Share [Text Block] Segment Reporting [Abstract] Revenue and property and equipment by geographic region [Table Text Block] Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements of Comprehensive Income [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Net income Net Income (Loss) Attributable to Parent Other comprehensive (loss) income, net of reclassification adjustments: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation gains (losses) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent Unrealized gains on investments Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Tax provision related to items of other comprehensive income or loss Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Deferred Revenue Disclosure [Abstract] Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Product [Member] Product [Member] Services [Member] Services [Member] Services [Member] Ratable and other revenue [Member] Ratable and Other Revneue [Member] Ratable and Other Revneue [Member] Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Short-term Deferred Revenue, Current Long-term Deferred Revenue, Noncurrent Total deferred revenue Deferred Revenue Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Stock Options [Member] Stock Options [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] ESPP [Member] Employee Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Compensation Plan [Member] Stock Compensation Plan [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Goodwill and Intangible Assets Disclosure [Abstract] GOODWILL AND OTHER INTANGIBLE ASSETS—NET Intangible Assets Disclosure [Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Employee Benefit Plan [Abstract] 11. Employee Benefit Plan [Abstract] Matching contributions to the RRSP and 401(k) Plans Defined Contribution Plan, Employer Matching Contribution, Amount Defined Contribution Plan, Employer Matching Contribution, Amount Financial Instruments and Fair Value [Abstract] Financial Instruments and Fair Value [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] Estimate of Fair Value [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Reported as [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Corporate debt securities [Member] Corporate Debt Securities [Member] Commercial paper [Member] Commercial Paper, Not Included with Cash and Cash Equivalents [Member] Municipal bonds [Member] US States and Political Subdivisions Debt Securities [Member] Municipal Bonds [Member] Municipal Bonds [Member] Certificates of deposit and term deposits [Member] Certificates of Deposit [Member] Money market funds [Member] Money Market Funds, Excluding Commercial Paper [Member] Money Market Funds, Excluding Commercial Paper [Member] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring [Member] Fair Value, Measurements, Recurring [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Cash equivalents [Member] Cash Equivalents, Line Item [Member] Cash Equivalents, Line Item [Member] Short-term investments [Member] Short Term Investments, Line Item [Member] Short Term Investments, Line Item [Member] Long-term investments [Member] Long Term Investments, Line Item [Member] Long Term Investments, Line Item [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [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] Less Than 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Available-for-sale securities, Fair Value Disclosure Available-for-sale Securities, Fair Value Disclosure Total Assets, Fair Value Disclosure Assets, Fair Value Disclosure Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 12 Months or Greater, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 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] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Volatility (%) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate (%) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend rate (%) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted-average fair value per share 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 Shares issued under the ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Weighted-average price per share issued (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share Business Combinations [Abstract] BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Schedule of Property, Plant and Equipment [Table] Schedule of 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] Land [Member] Land [Member] Building and building improvements [Member] Building and Building Improvements [Member] Evaluation units [Member] Evaluation Units [Member] Evaluation units [Member] Computer equipment and software [Member] Computer Equipment [Member] Furniture and fixtures [Member] Furniture and Fixtures [Member] Leasehold improvements and tooling [Member] Leaseholds and Leasehold Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Net, by Type [Abstract] Property, Plant and Equipment, Net, by Type [Abstract] Total property and equipment Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment - net Property, Plant and Equipment, Net Depreciation expense Depreciation Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets by Major Class [Axis] In Process Research and Development [Domain] In Process Research and Development [Domain] In Process Research and Development [Domain] In Process Research and Development [Member] In Process Research and Development [Member] In Process Research and Development [Member] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] ContingentConsiderationPayableInEighteenMonths [Domain] ContingentConsiderationPayableInEighteenMonths [Domain] ContingentConsiderationPayableInEighteenMonths [Domain] Contingent consideration payable after eighteen months [Member] Contingent consideration payable after eighteen months [Member] Contingent consideration payable after eighteen months [Member] Contingent consideration payable after two years [Member] Contingent consideration payable after two years [Member] Contingent consideration payable after two years [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Coyote Point Systems Inc [Member] Coyote Point Systems Inc [Member] Coyote Point Systems Inc [Member] XDN, Inc [Member] XDN, Inc [Member] XDN, Inc [Member] IntruGuard Devices, Inc [Member] IntruGuard Devices, Inc [Member] IntruGuard Devices, Inc [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Technology-Based Intangible Assets [Member] Technology-Based Intangible Assets [Member] Technology-Based Intangible Assets [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Acquired Finite-lived Intangible Asset, Amount Acquired Finite-lived Intangible Asset, Amount In-process research and development Acquired Indefinite-lived Intangible Asset, Amount Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Goodwill Goodwill Total consideration Business Combination, Consideration Transferred Amount withheld in escrow Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash to be Paid, Amount Withheld in Escrow Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash to be Paid, Amount Withheld in Escrow Purchased tangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Purchased identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Released amounts previously withheld in escrow Payments for Previous Acquisition Business Acquisition, Contingent Consideration, at Fair Value Business Acquisition, Contingent Consideration, at Fair Value Business Acquisition, Contingent Consideration, Potential Cash Payment Business Acquisition, Contingent Consideration, Potential Cash Payment Cash and cash equivalents Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents Other current assets Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets Finite-lived intangible assets Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets Indefinite-lived intangible assets Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable Goodwill Business Acquisition, Purchase Price Allocation, Goodwill Amount Other assets Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets Total assets acquired Business Acquisition, Purchase Price Allocation, Assets Acquired Current liabilities Business Acquisition, Purchase Price Allocation, Current Liabilities Long-term liabilities Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities Total liabilities assumed Business Acquisition, Purchase Price Allocation, Liabilities Assumed Total purchase price Business Acquisition, Cost of Acquired Entity, Purchase Price Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Weighted-average fair value per share granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Summary of Investments [Table Text Block] Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block] Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block] Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of Unrealized Loss on Investments [Table Text Block] Investments Classified by Contractual Maturity Date [Table Text Block] Investments Classified by Contractual Maturity Date [Table Text Block] Fair Value, by Balance Sheet Grouping and Measurement Inputs, Disclosure [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Inventory Disclosure [Abstract] INVENTORY Inventory Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] FOREIGN CURRENCY DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Total incremental lease payments Total Incremental Lease Payments Total incremental lease payments due to lease modification. Fiscal Years: Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2013 (remainder) Operating Leases, Future Minimum Payments Due, Next Twelve Months 2014 Operating Leases, Future Minimum Payments, Due in Two Years 2015 Operating Leases, Future Minimum Payments, Due in Three Years 2016 Operating Leases, Future Minimum Payments, Due in Four Years 2017 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due EMPLOYEE BENEFIT PLAN Compensation and Employee Benefit Plans [Text Block] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] DEFERRED REVENUE Deferred Revenue Disclosure [Text Block] 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] Employee Stock [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Product Revenue [Member] Cost of Goods Sold [Member] Cost of Goods Sold [Member] Cost of Services Revenue [Member] Cost of Services [Member] Cost of Services [Member] Research and development [Member] Research and Development Expense [Member] Selling and marketing [Member] Selling and Marketing Expense [Member] General and administrative [Member] General and Administrative Expense [Member] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Total stock-based compensation expense Allocated Share-based Compensation Expense SEGMENT AND SIGNIFICANT CUSTOMER INFORMATION Segment Reporting Disclosure [Text Block] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Independent Contract Manufacturing [Member] Independent Contract Manufacturing [Member] Independent Contract Manufacturing [Member] Other Purchase Obligations [Member] Other Purchase Obligations [Member] Other Purchase Obligations [Member] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Open purchase orders and other contractual obligations Unrecorded Unconditional Purchase Obligation Schedule of Purchase Price Allocation [Table Text Block] Schedule of Purchase Price Allocation [Table Text Block] Deferred Revenue, by Arrangement, Disclosure [Table Text Block] Deferred Revenue, by Arrangement, Disclosure [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Income Statement [Abstract] REVENUE: Revenue, Net [Abstract] Product Sales Revenue, Goods, Net Services Sales Revenue, Services, Net Ratable and other revenue Ratable and other revenue, Net Aggregate revenue during the period from ratable product and services, and other revenue rendered in the normal course of business, after deducting returns, allowances and discounts. Total revenue Revenue, Net COST OF REVENUE: Cost of Goods and Services Sold [Abstract] INTEREST INCOME Investment Income, Net Product Cost of Goods Sold Services Cost of Services Ratable and other revenue Cost of Ratable and Other Revenue Total costs related to ratable products and services, and other revenue rendered by an entity during the reporting period Total cost of revenue Cost of Goods and Services Sold GROSS PROFIT: Gross Profit [Abstract] Product Product Gross Profit Products Gross profit is the aggregate revenue less cost of goods sold directly attributable to the revenue generation activity. Services Services Gross Profit Service Gross Profit is the aggregate revenue less cost of services sold or operating expenses directly attributable to the revenue generation activity. Ratable and other revenue Ratable and Other Revenue Gross Profit Gross Profit is the aggregated revenue less the cost of ratable goods and services sold and cost of other revenue or operating expenses directly attributable to the revenue generation activity. Total gross profit Gross Profit OPERATING EXPENSES: Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses OPERATING INCOME Operating Income (Loss) OTHER INCOME (EXPENSE)—Net Other Nonoperating Income (Expense) INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest PROVISION FOR INCOME TAXES Income Tax Expense (Benefit) Net income per share: Basic (in dollars per share) Earnings Per Share, Basic NET INCOME Diluted (in dollars per share) Earnings Per Share, Diluted 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 Income Tax Contingency [Table] Income Tax Contingency [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Effective tax rate Effective Income Tax Rate, Continuing Operations Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits which, if recognized, would favorably impact the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Accrued interest and penalties related to uncertain tax provisions Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions And Allocation of Recognized Period Costs [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions And Allocation of Recognized Period Costs [Table Text Block] Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Income Tax Benefit from Stock Option Plans [Table Text Block] Income Tax Benefit from Stock Option Plans [Table Text Block] Income Tax Benefit from Stock Option Plans [Table Text Block] Presentation and Preparation of Consolidated Financial Statements [Policy Text Block] Presentation and Preparation of Consolidated Financial Statements [Policy Text Block] Presentation and Preparation of Consolidated Financial Statements [Policy Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [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] Balance - Beginning (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Balance - End (in shares) Options vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Balance - Ending (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, 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 Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Balance - Beginning (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Balance - Ending (in dollars per share) Options vested and expected to vest, Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options exercisable, Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Options vested and expected to vest, Weighted average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options exercisable, Weighted average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Compensation cost not yet recognized period of recognition Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Income tax benefit from employee stock option plans Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options FINANCIAL INSTRUMENTS AND FAIR VALUE Financial Instruments Disclosure [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Instrument Risk [Axis] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Canada, Dollars Canada, Dollars Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Notional Amount of Foreign Currency Derivative Purchase Contracts Notional Amount of Foreign Currency Derivative Purchase Contracts Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventory Inventory, Net STOCK PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Statement of Financial Position [Abstract] Common Stock, par value Common Stock, Par or Stated Value Per Share Common Stock, shares authorized Common Stock, Shares Authorized Common Stock, shares issued Common Stock, Shares, Issued Common Stock, shares outstanding Common Stock, Shares, Outstanding Inventory [Table Text Block] Schedule of Inventory, Current [Table Text Block] DEI [Abstract] DEI [Abstract] Document Information [Table] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Accrued warranty balance—beginning of the period Standard Product Warranty Accrual Warranty costs incurred Standard Product Warranty Accrual, Payments Provision for warranty Standard Product Warranty Accrual, Warranties Issued Changes in prior period estimates Standard Product Warranty Accrual, Preexisting, Increase (Decrease) Accrued warranty balance—end of the period Rent expense Operating Leases, Rent Expense, Net Schedule of Other Intangible Assets Major Class [Table Text Block] Schedule of Other Intangible Assets Major Class [Table Text Block] [Table Text Block] for Schedule of Other Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Balance—December 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Balance—March 31, 2013 RSUs expected to vest—December 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Balance, weighted-average grant-date fair value per share (in dollars per share)—December 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, 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 [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Granted, weighted-average grant-date fair value per share (in dollars per share) Forfeited, weighted-average grant-date fair value per share (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 Balance, weighted-average grant-date fair value per share (in dollars per share)—March 31, 2013 RSUs expected to vest, weighted-average grant-date fair value per share (in dollars per share)—March 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Weighted Average Grant Date Fair Value Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Unrealized Gains Available-for-sale Securities, Gross Unrealized Gains Unrealized Losses Available-for-sale Securities, Gross Unrealized Losses Fair Value Available-for-sale Securities, Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Less Than 12 Months, Unrealized Losses 12 Months or Greater, Unrealized Losses Total, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Short-term Investments Due within one to three years Long-term Investments ASSETS Assets [Abstract] CURRENT ASSETS: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Accounts receivable—Net Accounts Receivable, Net, Current Inventory Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current PROPERTY AND EQUIPMENT—Net LONG-TERM INVESTMENTS GOODWILL AND OTHER INTANGIBLE ASSETS—Net Intangible Assets, Net (Including Goodwill) OTHER ASSETS Other Assets, Noncurrent TOTAL ASSETS Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Accrued payroll and compensation Employee-related Liabilities, Current Deferred revenue Total current liabilities Liabilities, Current DEFERRED REVENUE—Non-current OTHER LIABILITIES Other Liabilities, Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES (Note 7) Commitments and Contingencies STOCKHOLDERS' EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.001 par value — 300,000 shares authorized; 163,550 and 161,757 shares issued and 162,141 and 160,348 shares outstanding as of March 31, 2013 and December 31, 2012, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock Treasury Stock, Value Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Schedule of Earnings Per Share [Table] Schedule of Earnings Per Share [Table] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Basic shares: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted-average common shares outstanding-basic (in shares) Diluted shares: Effect of potentially dilutive securities: Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract] Employee stock options and purchase rights (in shares) Incremental Common Shares Attributable to Share-based Payment Arrangements Weighted-average shares used to compute diluted net income per share (in shares) Net income per share: Earnings Per Share, Basic, Diluted [Abstract] Earnings Per Share, Basic, Diluted [Abstract] Diluted (in dollars per share) Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Net [Abstract] Finite-Lived Intangible Assets, Net [Abstract] Finite-lived other intangible assets, gross Finite-Lived Intangible Assets, Gross Customer relationships, gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Intangible Assets, Gross (Excluding Goodwill) Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Amortization expense Amortization of Intangible Assets 2013 (remainder) Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2014 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2018 Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Finite-Lived Intangible Assets, Net PROPERTY AND EQUIPMENT—NET Property, Plant and Equipment Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] Americas [Member] Americas [Member] Americas [Member] United States UNITED STATES Canada [Member] Canada [Member] Canada [Member] Other Americas [Member] Other Americas [Member] Other Americas [Member] EMEA [Member] Europe, Middle East and Africa [Member] Europe, Middle East and Africa [Member] APAC [Member] Asia Pacific and Japan [Member] Asia Pacific and Japan [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Concentration risk, percentage Concentration Risk, Percentage Revenue Property and equipment - net Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of investment premiums Accretion (Amortization) of Discounts and Premiums, Investments Stock-based compensation expense Share-based Compensation Excess tax benefit from employee stock option plans Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities Other non-cash items, net Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Accounts receivable—net Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Accrued payroll and compensation Increase (Decrease) in Employee Related Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Income taxes payable Increase (Decrease) in Income Taxes Payable Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of investments Payments to Acquire Investments Sales of investments Proceeds from Sale of Available-for-sale Securities Maturities of investments Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Purchases of property and equipment Payments to Acquire Productive Assets Payments made in connection with acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Excess tax benefit from employee stock option plans Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS Effect of Exchange Rate on Cash and Cash Equivalents NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) CASH AND CASH EQUIVALENTS—Beginning of year CASH AND CASH EQUIVALENTS—End of year SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid, Net NON-CASH INVESTING AND FINANCING ACTIVITIES: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Purchase of property and equipment not yet paid Capital Expenditures Incurred but Not yet Paid Liability incurred in connection with business acquisition Business Acquisition, Cost of Acquired Entity, Cash to be Paid, Amount Withheld in Escrow Business Acquisition, Cost of Acquired Entity, Cash to be Paid, Amount Withheld in Escrow