Segment Reporting [Abstract] Segments and Geographical Information Segment Reporting Disclosure [Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, Purchase Price Allocation [Table] Schedule Of Business Acquisitions Purchase Price Allocation [Table] Schedule of Business Acquisitions, Purchase Price Allocation [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] Trademarks (one to fifteen year useful lives) Trademarks [Member] Existing technology (thirteen year useful life) Existing Technology [Member] Existing Technology [Member] Customer relationships (eleven year useful life) Customer Relationships [Member] Schedule of Business Acquisitions, Purchase Price Allocation [Line Items] Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] Schedule of Business Acquisitions, Purchase Price Allocation [Line Items] Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Acquired identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Goodwill Goodwill Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Restructuring Reserve [Abstract] Restructurings and Exit Activities Restructuring and Related Activities Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Legal Proceedings Legal Matters and Contingencies [Text Block] Income Tax Disclosure [Abstract] Federal Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Federal Income Tax Expense (Benefit) Total federal income tax expense Federal Income Tax Expense (Benefit), Continuing Operations State State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) Deferred Deferred State and Local Income Tax Expense (Benefit) Total state tax expense State and Local Income Tax Expense (Benefit), Continuing Operations Foreign Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Foreign Tax Expense (Benefit) Deferred Deferred Foreign Income Tax Expense (Benefit) Total foreign tax expense Foreign Income Tax Expense (Benefit), Continuing Operations Provision for income taxes Income Tax Expense (Benefit) Investments, All Other Investments [Abstract] One year or less Marketable Securities, Current One year through two years Marketable Securities, Noncurrent Marketable Securities Marketable Securities Stockholders' Equity Note [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] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Stock Purchase Plan 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 Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted average fair value at grant date (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Marketable Securities and Fair Value Measurements [Abstract] Marketable Securities and Fair Value Measurements [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Scanners and CAD/CAM Services Scanners And CADCAM [Member] Scanners and CAD and CAM [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] Original maturity of highly liquid investments included in Cash and cash equivalents Maturity Period Used To Classify Investments Maturity Period Used to Classify Investments Weighted average maturity Marketable Securities, Weighted Average Remaining Maturity Marketable Securities, Weighted Average Remaining Maturity Impairment of long lived assets Impairment of Long-Lived Assets Held-for-use Impairment of goodwill Goodwill, Impairment Loss Schedule of Income before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Unrecognized Tax Benefits Rollforward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Number of Shares Underlying Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding beginning balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Cancelled or expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding ending balance (shares) Vested and expected to vest at December 31, 2013 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Exercisable at December 31, 2013 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding beginning balance (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cancelled or expired (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding ending balance (usd per share) Vested and expected to vest at December 31, 2013 (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Exercisable at December 31, 2013 (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] Outstanding as of December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Vested and expected to vest at December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Exercisable at December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Outstanding as of December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Vested and expected to vest at December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Exercisable at December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Balance Sheet Related Disclosures [Abstract] Accrued payroll and benefits Employee-related Liabilities, Current Accrued sales rebate Accrued Marketing Costs, Current Accrued sales tax and value added tax Sales and Excise Tax Payable, Current Accrued sales and marketing expenses Accrued Sales And Marketing Current Accrued Sales and Marketing, Current Accrued warranty Standard Product Warranty Accrual, Current Accrued accounts payable Accrued Accounts Payable Accrued Accounts Payable Accrued professional fees Accrued Professional Fees, Current Accrued income taxes Accrued Income Taxes, Current Other Other Accrued Liabilities, Current Total current accrued liabilities Accrued Liabilities, Current Statement of Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Net change in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Change in unrealized gains (losses) on available-for sale securities, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Stockholders Equity Note [Table] Stockholders Equity Note [Table] Stockholders Equity Note [Table] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Annual Vesting Annual Vesting [Member] Annual Vesting [Member] Monthly Vesting Monthly Vesting [Member] Monthly Vesting [Member] Employee Stock Incentive Plan 2005 [Member] Employee Stock Incentive Plan 2005 [Member] Employee Stock Incentive Plan 2005 [Member] Shares Transferred From 2001 Stock Incentive Plan Shares Transferred From 2001 Stock Incentive Plan [Member] Shares Transferred from 2001 Stock Incentive Plan [Member] Employee Stock Purchase Plan 2010 Employee Stock Purchase Plan 2010 [Member] Employee Stock Purchase Plan, 2010 [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Stock Options Employee Stock Option [Member] Market Performance Based Restricted Stock Units Market Performance Based Restricted Stock Units [Member] Market Performance Based Restricted Stock Units [Member] Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Axis] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award [Axis] Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Axis] Share-based Compensation Arrangements by Share-based Payment Award [Domain] Share Based Compensation Arrangements By Share Based Payment Award [Domain] Share-based Compensation Arrangements by Share-based Payment Award [Domain] Stockholder Rights Plan Stockholder Rights Plan [Member] Stockholder Rights Plan [Member] Incentive Plan 2005 Stock Incentive Plan 2005 [Member] 2005 Stock Incentive Plan [Member] Amended And Restated 2005 Stock Incentive Plan Amended And Restated 2005 Stock Incentive Plan [Member] Amended And Restated 2005 Stock Incentive Plan [Member] 2001 Purchase Plan Stock Plan 2001 [Member] Stock Plan 2001 [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights Preferred stock purchase right, number of rights declared for each outstanding share of our common stock Class Of Warrant Or Right Issuable With Each New Share Of Common Stock Class Of Warrant Or Right Issuable With Each New Share Of Common Stock Dividend distribution, date of record Dividends Payable, Date of Record Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock purchase right, exercise price (usd per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Number of shares called by each right (shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Preferred stock purchase right, minimum ownership percentage that should be acquired or intended to be acquired to trigger exercise Minimum Outstanding Stock Percentage That Should Be Acquired For Rights Issued To Become Exercisable Minimum Outstanding Stock Percentage That Should be Acquired for Rights Issued to Become Exercisable Ratio of common stock to purchase price Class of Warrant or Right, Ratio Of Common Stock Value To Purchase Price of Right Class of Warrant or Right, Ratio Of Common Stock Value To Purchase Price of Right Preferred stock purchase right, expiration Date Class Of Warrant Or Right Expiration Date Class of Warrant or Right, Expiration Date Increase in shares available for grant (shares) Share-based Compensation Arrangement by Share-based Payment Award, Incrase in Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Incrase in Number of Shares Available for Grant Shares reserved for issuance Common Stock, Capital Shares Reserved for Future Issuance Stock incentive plan, term Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term Share Based Compensation Arrangement by Share Based Payment Award, Options, Expiration Term Stock incentive plan, vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Stock incentive plan, vesting percentage Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Share Based Compensation Arrangement by Share based Payment Award, Vesting Percentage Total intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Fair value of stock options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Total unamortized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period of total unamortized cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Tax effect from exercised options Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Restricted stock units, shares vested and released (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Restricted stock units, shares withheld for tax payments Shares Paid for Tax Withholding for Share Based Compensation Restricted stock units, net issuance Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Employees' taxes paid upon the vesting of restricted stock units Payments Related to Tax Withholding for Share-based Compensation Total intrinsic value Share Based Compensation Arrangement, By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Released, Total Intrinsic Value Share Based Compensation Arrangement, By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Released, Total Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Percentage of market-performance based restricted stock units eligible to vest over the vesting period Percentage Of Market Performance Based Restricted Stock Units During Vesting Period Maximum percentage of market-performance based restricted stock units during vesting period. Employee Stock Purchase Plan, Duration Of Offering Period Employee Stock Purchase Plan, Duration Of Offering Period Employee Stock Purchase Plan, Duration Of Offering Period Employee stock purchase plan, purchase price as percentage of fair market value of common stock Share Based Compensation Arrangement By Share Based Payment Award Purchase Price Percentage Of Fair Market Value Share Based Compensation Arrangement by Share Based Payment Award, Purchase Price, Percentage of Fair Market Value Number of offering periods Employee Stock Purchase Plan, Number Of Six Month Purchasing Periods Employee Stock Purchase Plan, Number Of Six Month Purchasing Periods Maximum number of shares available Employee Stock Purchase Plan Number Of Shares Available For Issuance Employee Stock Purchase Plan, Number Of Shares Available for Issuance Employee stock purchase plan, shares issued Stock Issued During Period, Shares, Employee Stock Purchase Plans Weighted average exercise price (usd per share) Share-based Compensation by Share-based Payment Award, Weighted Average Purchase Price of Common Stock Share-based Compensation by Share-based Payment Award, Weighted Average Purchase Price of Common Stock Number of shares available for grant (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Stock-based compensation expense Allocated Share-based Compensation Expense 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] Deferred taxes Deferred Income Tax Expense (Benefit) Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation Share-based Compensation Amortization of intangibles Amortization of Intangible Assets Excess tax benefit from share-based payment arrangements Excess Tax Charge Benefit From Share Based Compensation Operating Activities Excess Tax Charge (Benefit) from Share based Compensation, Operating Activities Impairment of long-lived assets Other Other Noncash Income (Expense) Changes in assets and liabilities, excluding the effects of business combinations: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued and other long-term liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Deferred revenues Increase (Decrease) in Deferred Revenue 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] Acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Purchase of marketable securities Payments to Acquire Available-for-sale Securities Proceeds from maturities of marketable securities Proceeds from Sale and Maturity of Available-for-sale Securities Proceeds from Sale and Maturity of Marketable Securities Proceeds from Sale and Maturity of Marketable Securities Other assets Payments for (Proceeds from) Other Investing Activities 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 Common stock repurchase Payments for Repurchase of Common Stock Excess tax benefit from share-based payment arrangements Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of foreign exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of year Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of year Earnings Per Share [Abstract] Net Income per Share Earnings Per Share [Text Block] Business Combinations Business Combination Disclosure [Text Block] Income Statement [Abstract] Net revenues Revenue, Net Cost of revenues Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Research and development Research and Development Expense Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Other income (expense), net Other Nonoperating Income (Expense) Net income before provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Net income Net income per share: Basic (usd per share) Earnings Per Share, Basic Diluted (usd per share) Earnings Per Share, Diluted Shares used in computing net income per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (shares) Weighted Average Number of Shares Outstanding, Basic Diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Marketable Securities and Fair Value Measurements Financial Instruments 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] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenues Cost of Sales [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Research and development Research and Development Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Schedule of Purchase Price Schedule of Business Acquisitions, by Acquisition [Table Text Block] Pro Forma Financial Information Business Acquisition, Pro Forma Information [Table Text Block] Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of credit, available borrowings Line of Credit Facility, Maximum Borrowing Capacity Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Minimum unrestricted cash balance requirement Minimum Unrestricted Cash Balance To Be Maintained Minimum unrestricted cash balance to be maintained. Interest rate on borrowings at LIBOR plus, minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Interest rate on borrowings at LIBOR plus, maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Line of credit, amount outstanding Line of Credit Facility, Amount Outstanding Net revenues Business Acquisition, Pro Forma Revenue Net income Business Acquisition, Pro Forma Net Income (Loss) Short-Term And Long-Term Marketable Securities Available-for-sale Securities [Table Text Block] Marketable Securities Marketable Securities [Table Text Block] Financial Assets Measured At Fair Value On A Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring Basis [Table] 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] Money market funds Money Market Funds [Member] Commercial paper Commercial Paper [Member] Corporate bonds Corporate Bond Securities [Member] U.S. dollar dominated foreign corporate bonds Foreign Government Debt Securities [Member] U.S. government agency bonds Agency Bonds [Member] Agency Bonds [Member] Israeli funds Israeli Severance Funds [Member] Israeli Severance Funds [Member] Municipal Securities [Member] Municipal Securities [Member] Municipal Securities [Member] Asset-backed Securities [Member] Asset-backed Securities [Member] U.S. Government Treasury Bonds [Member] U.S. Government Treasury Bonds [Member] U.S. Government Treasury Bonds [Member] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Axis] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Axis] Schedule of Fair Value of Separate Accounts by Major Category of Investment, Category [Domain] Schedule of Fair Value of Separate Accounts by Major Category of Investment, Category [Domain] Cash Equivalents Cash Equivalents [Member] Short-term Investments Short-term Investments [Member] Long Term Investments Long Term Investments [Member] Long Term Investments [Member] Other assets Other Assets [Member] Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] Money market funds Cash and Cash Equivalents, Fair Value Disclosure Investments Available-for-sale Securities Other assets Other Assets, Fair Value Disclosure Assets measured at fair value Assets, Fair Value Disclosure Scanners, Warranty period Standard Product Warranty Time Period Standard Product Warranty Time Period Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested beginning balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested and released (shares) Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested ending balance (shares) Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Nonvested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract] Nonvested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Total Intrinsic Value Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Nonvested, Total Intrinsic Value Accounting Policies [Abstract] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Noncurrent Assets [Member] Noncurrent Assets [Member] Noncurrent Assets [Member] Prepaid Expenses and Other Current Assets [Member] Prepaid Expenses and Other Current Assets [Member] 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] Leasehold improvements Leasehold Improvements [Member] Building Building [Member] Software Development Software Development [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Number of operating segments Number of Operating Segments Restricted cash Restricted Cash and Cash Equivalents, Current Number of financial instutions used Cash, Financial Institutions Used Cash, Financial Institutions Used Property, plant and equipment, estimated useful life Property, Plant and Equipment, Useful Life Other intangible assets, estimated useful lives Finite-Lived Intangible Asset, Useful Life Advertising cost Advertising Expense Lease term Lease Term Lease Term Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Medical device tax expense Medical Device Excise Tax Expense (Benefit) Medical Device Excise Tax Expense (Benefit) Deferred tax assets: Deferred Tax Assets, Net [Abstract] Net operating loss and capital loss carryforwards Deferred Tax Assets Net Operating And Capital Loss Carryforwards Deferred Tax Assets, Net Operating and Capital Loss Carryforwards Credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Reserves and accruals Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Translation gains Deferred Tax Assets, Unrealized Currency Losses Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Total deferred tax assets, gross Deferred Tax Assets, Gross Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Depreciation and amortization Deferred Tax Liabilities, Property, Plant and Equipment Total deferred tax liabilities, gross Deferred Tax Liabilities, Gross Net deferred tax assets before valuation allowance Deferred Tax Assets Liabilities Gross Deferred Tax Assets (Liabilities), Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax assets Deferred Tax Assets, Net Goodwill and Intangible Assets Disclosure [Abstract] 2014 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Finite-Lived Intangible Assets, Net Valuation and Qualifying Accounts [Abstract] Schedule II: Valuation and Qualifying Accounts and Reserves Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Operating expense Operating Expense [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuings and exit activities, expected reduction in headcount Restructuring and Related Cost, Expected Number of Positions Eliminated Restructurings and exit activities, costs incurred Restructuring and Related Cost, Incurred Cost Weighted average fair value per share at grant date (usd 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 Statement of Financial Position [Abstract] Accounts receivable, allowance for doubtful accounts and returns Allowance For Doubtful Accounts Receivable And Sales Returns Current Allowance For Doubtful Accounts Receivable And Sales Returns Current Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, issued (shares) Preferred Stock, Shares Issued Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, issued (shares) Common Stock, Shares, Issued Common stock, outstanding (shares) Common Stock, Shares, Outstanding Supplemental Cash Flow Information [Abstract] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule Of Amortized Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Future Amortization For Finited-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Balance at beginning of period Standard Product Warranty Accrual Charged to cost of revenues Standard Product Warranty Accrual, Warranties Issued Actual warranty expenditures Standard Product Warranty Accrual, Payments Balance at end of period Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Trademarks Existing technology Customer Relationships [Member] Other Intangible Assets [Member] Other Intangible Assets [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Estimated useful lives of intangibles Gross Carrying Amount as of December 31, 2012 Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Impairment Charge Finite-Lived Intangible Assets, Accumulated Impairment Loss Finite-Lived Intangible Assets, Accumulated Impairment Loss Credit Facilities Debt Disclosure [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Clear Aligner Clear Aligner [Member] Clear Aligner [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Translation Adjustments Goodwill, Translation Adjustments Goodwill [Roll Forward] Goodwill [Roll Forward] Balance, Beginning Balance Adjustment to goodwill Goodwill, Acquired During Period Impairment of goodwill Balance, Ending Balance Statement [Table] Statement [Table] Stock Option Equity Option [Member] Statement [Line Items] Statement [Line Items] Stock-based Compensation Expense Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Stock Option Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Weighted Average Assumptions Used for the Fair Value of Options Component of Purchase Plan Granted Estimated at Grant Date Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Summary Of Nonvested Shares Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Summary Of Nonvested Shares Schedule of Nonvested Performance-based Units Activity [Table Text Block] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used Table [Text Block] Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Table Text Block] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Restatement Adjustment [Member] Restatement Adjustment [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Net revenues Operating expenses Income Taxes Income Tax Disclosure [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Clinical and manufacturing equipment Equipment [Member] Computer hardware Technology Equipment [Member] Computer software Software and Software Development Costs [Member] Furniture and fixtures Furniture and Fixtures [Member] Land Land [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment Property, Plant and Equipment, Gross Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Property, Plant and Equipment, Net Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Invisalign Full [Member] Invisalign Full [Member] Invisalign Full [Member] Invisalign Express/Lite [Member] Invisalign ExpressLite [Member] Invisalign Express/Lite [Member] Invisalign Teen [Member] Invisalign Teen [Member] Invisalign Teen [Member] Invisalign Assist [Member] Invisalign Assist [Member] Invisalign Assist [Member] Invisalign Non-Case Revenues [Member] Invisalign Non-Case Revenues [Member] Invisalign Non-Case Revenues [Member] Scanners [Member] Scanners [Member] Scanners [Member] CAD/CAM Services [Member] CADCAM Services [Member] CADAndCAM Services [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue Gross profit 2014 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2015 Operating Leases, Future Minimum Payments, Due in Two Years 2016 Operating Leases, Future Minimum Payments, Due in Three Years 2017 Operating Leases, Future Minimum Payments, Due in Four Years 2018 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts Allowance for Doubtful Accounts, Current [Member] Allowance for deferred tax assets Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period Valuation Allowances and Reserves, Balance Additions (reductions) to Costs and Expenses Valuation Allowances And Reserves Charged To Cost And Expense Or Revenue Valuation Allowances and Reserves, Charged to Cost and Expense or Revenue Write offs Valuation Allowances and Reserves, Deductions Charged to Other Accounts Valuation Allowances and Reserves, Charged to Other Accounts Reclassification from Other Accounts Valuation Allowances and Reserves, Adjustments Balance at End of Period Raw materials Inventory, Raw Materials, Gross Work in process Inventory, Work in Process, Gross Finished goods Inventory, Finished Goods, Gross Inventories Inventory, Net Schedule Of Earnings Per Share Basic And Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Compensation Related Costs [Abstract] Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table] Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table] Deferred Compensation Arrangement with Individual, Postretirement Benefits, by Type of Deferred Compensation [Axis] Postretirement Benefits, Type of Deferred Compensation [Axis] Type of Deferred Compensation [Domain] Type of Deferred Compensation, All Types [Domain] Defined Contribution Pension Plan 401k Defined Contribution Pension Plan 401k [Member] Defined Contribution Pension Plan 401k [Member] Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] Employer matching contribution as percentage of employee's salary deferral contributions Defined Benefit Plan Employer Contribution Percentage Defined Benefit Plan, Employer Contribution, Percentage Employer matching contribution as percentage of employee's eligible compensation Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Employer contributions amount Deferred Compensation Arrangement with Individual, Employer Contribution Accrued severance funds liability Supplemental Unemployment Benefits, Severance Benefits Common Stock Repurchase Program [Abstract] Common Stock Repurchase Program [Abstract] Common Stock Repurchase Program Share Repurchase Program Disclosure [Text Block] Share Repurchase Program Disclosure U.S. federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State income taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Impact of differences in foreign tax rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Goodwill Impairment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent Amortization of stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent Non-deductible transaction fees Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Valuation allowance release Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Other items not individually material Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective Income Tax Rate, Continuing Operations, Total Effective Income Tax Rate Reconciliation, Percent 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] Unrecognized tax benefit as of beginning of period Unrecognized Tax Benefits Tax positions related to current year, additions for uncertain tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Tax positions related to prior year, additions for uncertain tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases for uncertain tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized tax benefit as of end of period Goodwill Asset impairment charges Asset Impairment Charges Impairment of intangible assets Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] 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Research Research Tax Credit Carryforward [Member] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Tax incentives, period Income Tax Incentive Period Income Tax Incentive Period Tax incentives, corporate income tax rate that would apply absent the incentives National Corporate Tax Rate National Corporate Tax Rate Tax incentives, reduction in income taxes Income Tax Holiday, Aggregate Dollar Amount Tax benefit of tax holiday on net income per share (diluted) (usd per share) Income Tax Holiday, Income Tax Benefits Per Share Deferred tax assets, valuation allowance Change in valuation allowance Valuation Allowance, Deferred Tax Asset, Change in Amount Net operating loss carryforwards Operating Loss Carryforwards Research credit carryforward Tax Credit Carryforward, Amount Increase in unrecognized tax benefits Unrecognized Tax Benefits, Period Increase (Decrease) Unrecognized tax benefits Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Corporate bonds Corporate Debt Securities [Member] US Government Agency Bonds [Member] US Government Agency Bonds [Member] US Government Agency Bonds [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available For Sale Securities Gross Unrealized Gain In Investments Available For Sale Securities Gross Unrealized Gain In Investments Gross Unrealized Losses Available For Sale Securities Gross Unrealized Loss In Investments Available For Sale Securities Gross Unrealized Loss In Investments Fair Value United States UNITED STATES Mexico Mexico [Member] Mexico [Member] the Netherlands NETHERLANDS Other international Other International [Member] Other International [Member] Long-lived assets Long-Lived Assets Antidilutive securities excluded from computation of earnings per share (shaares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Deficit Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance (in shares) Shares, Outstanding Beginning Balance Stockholders' Equity Attributable to Parent Net change in unrealized gain (loss) from available-for sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Net change in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Issuance of common stock relating to employee equity compensation plans (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of common stock relating to employee equity compensation plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Tax withholdings related to net share settlements of restricted stock units Tax Withholding Related To Vesting Of Restricted Stock Units Tax Withholding Related to Vesting of Restricted Stock Units Shares issued for litigation settlement (shares) Stock Issued During Period, Shares, Other Stock Issued During Period, Value, Other Stock Issued During Period, Value, Other Common stock repurchased and retired (shares) Stock Repurchased and Retired During Period, Shares Common stock repurchased and retired Stock Repurchased and Retired During Period, Value Excess tax benefit from share based payment arrangements Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Stock based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Ending Balance (in shares) Ending Balance Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Share Repurchases [Table] Share Repurchases [Table] Share Repurchases [Table] Additional Paid-in Capital Retained Earnings Share Repurchases [Line Items] Share Repurchases [Line Items] Share Repurchases [Line Items] Repurchase of common stock, common stock authorized Stock Repurchase Program, Authorized Amount Common stock repurchased (in shares) Stock Repurchased During Period, Shares Repurchase of common stock, average price per share (usd per share) Share Repurchases Price Paid Per Share Share Repurchases, Price Paid Per Share Stock Repurchased and Retired During Period, Value Repurchase of common stock, aggregate purchase price - Increase/(Decrease) In Equity Stock Repurchased During Period, Value Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [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] Total rent expense Operating Leases, Rent Expense, Net 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] Cadent [Member] Cadent [Member] Cadent [Member] ICA Holdings Pty Limited [Member] ICA Holdings Pty Limited [Member] ICA Holdings Pty Limited [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Acquisition, net of cash acquired Transaction costs Business Acquisition, Transaction Costs Contributed revenues Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Contributed gross profit Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Liabilities assumed Schedule of Future Lease Payments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Document Documentand Entity Information [Abstract] Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding (shares) Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Public Float Entity Public Float Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted-average common shares outstanding, basic (shares) Dilutive effect of potential common stock (shares) Weighted Average Number Diluted Shares Outstanding Adjustment Total shares, diluted (shares) Net income per share, basic (usd per share) Net income per share, diluted (usd per share) Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Property and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Warranty accrual Schedule of Product Warranty Liability [Table Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Business Description Description Of Business Policy [Text Block] Description of Business [Policy Text Block] Basis of presentation and preparation Basis Of Presentation [Policy Text Block] Basis of Presentation [Policy Text Block] Use of estimates Use of Estimates, Policy [Policy Text Block] Fair value of financial instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Marketable Securities Marketable Securities, Policy [Policy Text Block] Foreign currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Certain risks and uncertainties Credit Risk Policy [Text Block] Credit Risk Policy [Text Block] Inventories Inventory, Policy [Policy Text Block] Property, plant and equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill and finite-lived purchased intangible assets Goodwill and Intangible Assets, Policy [Policy Text Block] Impairment of goodwill, finite-lived purchased intangible assets and long-lived assets Impairment Of Goodwill Intangible Assets And Long Lived Assets Policy [Text Block] Impairment of Goodwill Intangible Assets and Long Lived Assets [Policy Text Block] Development costs for internal use software Research, Development, and Computer Software, Policy [Policy Text Block] Product Warranty Standard Product Warranty, Policy [Policy Text Block] Allowance for Doubtful Accounts Receivables, Policy [Policy Text Block] Revenue recognition Revenue Recognition, Policy [Policy Text Block] Shipping and Handling Costs Shipping and Handling Cost, Policy [Policy Text Block] Legal Proceedings and Litigations Commitments and Contingencies, Policy [Policy Text Block] Research and development Research and Development Expense, Policy [Policy Text Block] Advertising costs Advertising Costs, Policy [Policy Text Block] Common Stock Repurchase Stockholders' Equity, Policy [Policy Text Block] Operating Leases Lease, Policy [Policy Text Block] Income taxes Income Tax, Policy [Policy Text Block] Stock-based compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Comprehensive income (loss) Comprehensive Income Loss Policy [Text Block] Comprehensive Income (Loss), Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Taxes paid Income Taxes Paid Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Fixed assets acquired with accounts payable or accrued liabilities Capital Expenditures Incurred but Not yet Paid Unclaimed merger consideration liability Merger Consideration Merger Consideration Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Number of reportable segments Number of Reportable Segments ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Marketable securities, short-term Available-for-sale Securities, Debt Securities, Current Accounts receivable, net of allowance for doubtful accounts and returns of $1,733 and $3,167, respectively Accounts Receivable, Net, Current Inventories Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Marketable securities, long-term Available-for-sale Securities, Debt Securities, Noncurrent Property, plant and equipment, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent 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 Deferred revenues Deferred Revenue, Current Total current liabilities Liabilities, Current Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Notes 7 and 9) Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.0001 par value (5,000 shares authorized; none issued) Preferred Stock, Value, Issued Common stock, $0.0001 par value (200,000 shares authorized; 80,583 and 80,611 issued and outstanding at 2013 and 2012, respectively) Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive income, net Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Shares Underlying RSUs Nonvested, beginning balance (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (usd per share) Vested and released (usd per share) Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Vested And Released In Period Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Vested And Released In Period Weighted Average Grant Date Fair Value Forfeited (usd per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeits In Period Weighted Average Grant Date Fair Value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeits In Period Weighted Average Grant Date Fair Value Nonvested, ending balance (usd per share) Weighted Remaining Vesting Period (in years) Nonvested as of December 31, 2013 Nonvested as of December 31, 2013 Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block]