Document and Entity Information Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Available-for-sale Securities, Current Marketable securities Accounts Receivable, Net, Current Accounts receivable, net of allowance for doubtful accounts of $194 and $237 at September 30, 2014 and December 31, 2013, respectively Prepaid Expense and Other Assets, Current Prepaid expenses and other assets Deferred Tax Assets, Net, Current Deferred tax assets Assets, Current Total current assets Available-for-sale Securities, Noncurrent Marketable securities Property, Plant and Equipment, Net Property and equipment, net Goodwill Balance at the end of the period Balance at the beginning of the period Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Deferred Tax Assets, Net, Noncurrent Deferred tax assets Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Deferred Revenue, Current Deferred revenues Business Combination Contingent Consideration Liability Current Contingent consideration obligation Liabilities, Current Total current liabilities Capital Lease Obligations, Noncurrent Lease financing obligation - long-term Business Combination Contingent Consideration Liability Noncurrent Contingent consideration obligation - long-term Convertible Notes Payable, Noncurrent Convertible debt Other Liabilities, Noncurrent Other liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.0001 par value; 10,000 shares authorized, 0 shares issued and outstanding at September 30, 2014 and December 31, 2013 Common Stock, Value, Issued Common stock, $0.0001 par value; 100,000 shares authorized, 46,076 and 44,456 shares issued; 42,343 and 40,663 outstanding at September 30, 2014 and December 31, 2013, respectively Treasury Stock, Value Treasury stock, at cost (3,733 and 3,793 shares at September 30, 2014 and December 31, 2013, respectively) Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Balance at the end of the period Balance at the beginning of the period Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowance for doubtful accounts (in dollars) Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars 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 Treasury Stock, Shares Treasury stock, shares CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Revenues Net revenues Costs and Expenses [Abstract] Costs and expenses: Cost of Services Cost of services Research and Development Expense Research and development Selling, General and Administrative Expense Selling, general and administrative Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Net change in contingent consideration obligation Fair value adjustment to contingent obligation included in net income Restructuring Charges. Restructuring charges Depreciation, Depletion and Amortization Depreciation and amortization Costs and Expenses Total costs and expenses Operating Income (Loss) Income from operations Investment Income, Interest Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other income (expense) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income tax expense Income Tax Expense (Benefit) Income tax expense Net Income (Loss) Attributable to Parent Net income Net income Net income attributable to common stockholders Earnings per Common Share Net income per common share: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding: Denominator: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average common shares outstanding - basic Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average common shares outstanding - diluted Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) Total other comprehensive income (loss) CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash (used in) provided by operating activities: The aggregate expense, excluding amortization of bond premium, recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Depreciation Depletion and Amortization Excluding Bond Premiums Depreciation and amortization expense Amortization of Financing Costs Amortization of debt issuance costs Amortization of Debt Discount (Premium) Amortization of bond premium Deferred Income Tax Expense (Benefit) Deferred income taxes Represents the non cash portion of interest on leased facility and obligations incurred by the entity during the reporting period. Leased Facility Accrued Noncash Interest Non-cash interest on leased facility Share-based Compensation Stock-based compensation Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net of allowance for doubtful accounts Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. Business Combination Contingent Consideration Arrangements Change in Amount of Contingent Consideration Liability 1 Cash Flow Effect Contingent consideration obligation Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefit from the exercise of stock options Increase (Decrease) in Other Operating Liabilities Other liabilities Increase (Decrease) in Deferred Revenue Deferred revenues Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of fixed assets Payments to Acquire Available-for-sale Securities Purchases of marketable securities available-for-sale Proceeds from Sale and Maturity of Available-for-sale Securities Maturities of marketable securities available-for-sale Payments to Acquire Businesses, Net of Cash Acquired Business acquired, net of cash Payments to acquire business, net of cash acquired Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financing activities: Proceeds from Stock Options Exercised Proceeds from the exercise of stock options Represents the cash outflow for payment of contingent consideration by the entity during the reporting period. Payments on Contingent Consideration Payments on contingent consideration obligation Payments of Debt Issuance Costs Debt issuance costs related to convertible notes Proceeds from Convertible Debt Proceeds from issuance of convertible notes Proceeds from Lines of Credit Borrowings on revolving line of credit Proceeds from Credit Facility to fund acquisitions Repayments of Lines of Credit Repayment of revolving line of credit Payments on Credit Facility, including interest Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit from the exercise of stock options Proceeds from Sale of Treasury Stock Proceeds from the sale of treasury stock in connection with an employee stock purchase plan Cash received under program Repayments of Long-term Capital Lease Obligations Repayments of capital obligations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash Net Cash Provided by (Used in) Continuing Operations Net increase in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosures of cash flow information: Income Taxes Paid, Net Cash paid for income taxes Description of Business Nature of Operations [Text Block] Description of Business Basis of Presentation and Consolidation Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation and Consolidation Earnings Per Share [Text Block] Earnings per Common Share Fair Value Measurements of Assets and Liabilities Fair Value Disclosures [Text Block] Fair Value Measurements of Assets and Liabilities Acquisition Business Combination Disclosure [Text Block] Acquisition Stockholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Stockholders' Equity Accumulated Other Comprehensive Income (Loss). Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss) Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill Debt Instruments [Abstract] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Debt Long-term Debt [Text Block] Debt Legal Matters Legal Matters and Contingencies [Text Block] Legal Matters Subsequent Events Subsequent Events [Text Block] Subsequent Events Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of reconciliation of the numerator and denominator used in computing basic and diluted net income attributable to common stockholders per common share Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of assets and liabilities held and their related classifications under the fair value hierarchy Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of aggregate fair value of available-for-sale securities and aggregate amount of unrealized gains and losses for available-for-sale securities Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of changes in fair value of Level 3 contingent consideration obligation Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Acquisition Tabular disclosure of the components of the purchase price of the acquisition. Schedule of Business Acquisition, Cost of Acquired Entity Purchase Price [Table Text Block] Summary of purchase price Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of intangible assets Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of weighted-average assumptions used in the Black-Scholes option pricing model Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of information about stock options outstanding Schedule of Nonvested Share Activity [Table Text Block] Schedule of non-vested restricted stock and changes Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of weighted-average assumptions used to value employee stock purchase rights Comprehensive Income (Loss) [Table Text Block] Schedule of comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of changes in accumulated other comprehensive income (loss) Schedule of Goodwill [Table Text Block] Schedule of changes in goodwill Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Stock options that are anti-dilutive and excluded from calculation of diluted earnings per share (in shares) Earnings Per Share Reconciliation [Abstract] Reconciliation of the numerator and denominator used in computing basic and diluted net income attributable to common stockholders per common share Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Numerator: Interest on Convertible Debt, Net of Tax Income effect for interest on convertible debt, net of tax Net Income (Loss) Available to Common Stockholders, Diluted Numerator for diluted EPS- Income to common stockholders after assumed conversions Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Dilutive effect of: Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Shares from assumed conversion of convertible debt Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Options and unvested restricted shares Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 Fair Value Inputs Level2 [Member] Level 2 Fair Value Inputs Level3 [Member] Level 3 Estimate Of Fair Value Fair Value Disclosure [Member] Total Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Represents Miyowa S.A., an acquisition of the entity. Miyowa S A [Member] Miyowa Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of assets and liabilities held by the Company and their related classifications under the fair value hierarchy Assets and Liabilities Fair Value Disclosure [Abstract] Summary of assets and liabilities held by the Company and their related classifications under the fair value hierarchy Money Market Funds, at Carrying Value Money market funds The value of certificates of deposit, municipal and corporate bonds and enhanced income money market funds which are classified as marketable securities. Certificates of Deposit Municipal and Corporate Bonds Enhanced Income Funds Certificates of deposit, municipal bonds and corporate bonds Business Combination, Contingent Consideration, Liability Contingent consideration obligation Estimated fair value of the Earn-out payments Earn-out payments due Assets, Net Fair value of net assets Fair Value, Assets, Level 1 to Level 2 Transfers, Amount Fair value of asset transfers from Level 1 to Level 2 Fair Value, Assets, Level 2 to Level 1 Transfers, Amount Fair value of asset transfers from Level 2 to Level 1 Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Aggregate Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due in one year or less Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after one year, less than five years Available-for-sale Securities, Debt Securities Total Available-for-sale Securities, Gross Unrealized Gain [Abstract] Aggregate Amount of Unrealized Gains Represents the gross unrealized gains for debt securities, which are expected to mature within one year of the balance sheet date, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Available for Sale Securities, Gross Unrealized Gain, Debt Maturities within One Year Due in one year or less Represents the gross unrealized gains for debt securities, which are expected to mature after one year and through five years from the balance sheet date, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Available for Sale Securities, Gross Unrealized Gain, Debt Maturities after One Through Five Years Due after one year, less than five years Available for Sale Securities Gross Unrealized Gain Accumulated in Investments Total Available-for-sale Securities, Gross Unrealized Loss [Abstract] Aggregate Amount of Unrealized Losses Represents the gross unrealized losses for debt securities, which are expected to mature within one year of the balance sheet date, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Available for Sale Securities, Gross Unrealized Losses, Debt Maturities within One Year Due in one year or less Represents the gross unrealized losses for debt securities which are expected to mature after one year and through five years from the balance sheet date, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Available for Sale Securities, Gross Unrealized Losses, Debt Maturities after One Through Five Years Due after one year, less than five years Available for Sale Securities Gross Unrealized Loss Accumulated in Investments Total Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value by Liability Class [Domain] Commitments [Member] Contingent Consideration Obligation Represents information pertaining to the acquisition of Strumsoft (USA), Inc., a California corporation and Strumsoft (India) Pvt. Ltd., an Indian entity. Strumsoft Inc [Member] Strumsoft, Inc. (Strumsoft) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Level 3 changes Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Changes in fair value of the Company's Level 3 contingent consideration obligation Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Balance as at the end of the period Balance as at the beginning of the period Represents the adjustment to the liability arising from an item of contingent consideration assumed in a business acquisition resulting from earnings during the period. Business Combination, Contingent Consideration Arrangements, Contingent Consideration Liability Adjustment for Earnings Earn-out compensation due to employees Represents activity related to Digi-Data. Digi Data [Member] Digi-Data Business Combination, Consideration Transferred [Abstract] Allocation of Consideration Transferred Company payments Business Combination, Consideration Transferred Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] Estimated fair values of assets and liabilities assumed as of the acquisition date Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Prepaid expenses and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Accounts receivable Capitalized Computer Software, Gross Technology Finite-Lived Customer Relationships, Gross Customer relationships Amount of assets, including goodwill, acquired at the acquisition date. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Including Goodwill Total assets acquired The amount of acquisition cost of a business combination allocated to accounts payable and accrued liabilities of the acquired entity. Business Acquisition, Purchase Price Allocation Current Liabilities Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Deferred revenues Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Deferred taxes Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Net assets acquired Finite-Lived Intangible Asset, Useful Life Estimated useful life of assets Estimated useful life Business Combination, Goodwill [Abstract] Goodwill acquired Business Acquisition, Goodwill, Expected Tax Deductible Amount Purchase price, tax deductible portion of goodwill Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Acquired Finite-Lived Intangible Assets [Line Items] Intangible assets acquired Finite-Lived Intangible Assets, Net [Abstract] Intangible assets: Intangible assets Finite-Lived Intangible Assets, Gross Gross amount Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Accumulated amount of translation adjustments of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Finite-Lived Intangible Assets, Accumulated Translation Adjustments Fx adjustment Finite-Lived Intangible Assets, Net Net amount Business Combination, Description [Abstract] Other information Business Combination, Acquisition Related Costs Acquisition-related costs Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Employee Stock Option [Member] Stock Options Restricted Stock [Member] Restricted Stock Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Stock [Member] Employee Stock Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stockholder's Equity Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Weighted-average assumptions used in the Black-Scholes option pricing model Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected stock price volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield (as a percent) Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] Share-based compensation expense additional disclosures Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-average fair value (as of the date of grant) of the options granted during the period (in dollars per share) Allocated Share-based Compensation Expense Pre-tax stock-based compensation expense recorded Allocated Share-based Compensation Expense, Net of Tax After tax stock-based compensation expense Represents the expense recognized during the period arising from equity-based compensation arrangements per diluted share. Allocated Share Based Compensation Expense Per Diluted Share Stock-based compensation expense per diluted share (in dollars per share) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Stock-based compensation cost related to non-vested equity awards not yet recognized as an expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted-average period over which stock-based compensation cost related to non-vested equity awards is expected to be recognized Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding at the end of the period (in shares) Options outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Options Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Options Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Vested or expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Balance at the end of the period (in dollars per share) Balance at the beginning of the period (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Options Cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vested or expected to vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable (in dollars per share) Share Based Compensation Arrangement by Share Based Payment Award, Options Weighted Average Remaining Contractual Term [Abstract] Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Vested or expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable Share Based Compensation Arrangement by Share Based Payment Award, Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Vested or expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Non-vested at the end of the period (in shares) Non-vested at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Employee Stock Purchase Plan Represents the term of Employee Stock Purchase Plan to all active employees. Term of Employee Stock Purchase Plan Term of Employee Stock Purchase Plan The period of time that employees participate through payroll withholdings in the Employee Stock Purchase Plan. Employee Stock Purchase Plan Payroll Withholding Period Employee Stock Purchase Plan Payroll Withholding Period Common Stock, Capital Shares Reserved for Future Issuance Total number of shares available for purchase Represents the percentage of fair market value of common stock on the first day of the offering period. Percentage of Fair Market Value of Common Stock Percentage of fair market value of common stock Represents the maximum percentage of total combined voting power a participant is allowed to be granted a right to purchase common stock. Percentage Maximum of Total Combined Voting Power Participant Allowed to be Granted Right to Purchase Common Stock Maximum Percentage of total combined voting power a participant is allowed to be granted a right to purchase common stock Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee Maximum number of shares allowed to be purchased by single participant Stock Issued During Period, Shares, Employee Stock Purchase Plans Number of shares sold under Employee Stock Purchase Plan Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Translation Adjustment [Member] Foreign Currency Changes to accumulated comprehensive income resulting from net gain (loss) on intra-entity foreign currency transactions. Accumulated Net Gain Loss On Intra Entity Foreign Currency Transactions [Member] Unrealized (Loss) Income on Intra-Entity Foreign Currency Transactions Accumulated Net Unrealized Investment Gain Loss [Member] Unrealized Holding Gains (Losses) on Available-for-Sale Securities Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Comprehensive income (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Translation adjustments Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on securities, (net of tax) Represents the amount after tax, changes to accumulated comprehensive income resulting from net gain (loss) on intra-entity foreign currency transactions. Other Comprehensive Income, Net Gain (Loss) on Intra Entity Foreign Currency Transactions Arising During Period, Net of Tax Net (loss) on intra-entity foreign currency transactions Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Changes in accumulated other comprehensive income (loss) Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other comprehensive income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Amounts reclassified to (from) accumulated other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total other comprehensive income (loss) Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill Goodwill [Roll Forward] Goodwill Goodwill, Acquired During Period Acquisitions Represents the amount of reclassifications, adjustments and other changes, during the reporting period in the carrying value of goodwill. Goodwill Reclassifications Adjustments and Other Reclassifications, adjustments and other Goodwill, Translation Adjustments Translation adjustments Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed Technology Rights [Member] Technology Finite-Lived Intangible Assets [Line Items] Intangible assets Credit Facility. Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] LIBOR Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Line Of Credit [Member] Credit Facility Line of Credit Facility [Line Items] Credit Facility Line of Credit Facility, Maximum Borrowing Capacity Borrowing capacity Line of Credit Facility, Commitment Fee Percentage Commitment fee on unused balance (as a percent) Debt Instrument, Unused Borrowing Capacity, Fee Commitment fee on unused balance Represents the borrowing capacity maximum amount to which the company has a right to request an increase. Line of Credit Facility Right to Increase Maximum Borrowing Capacity Amount Amount of borrowing capacity to which the company has a right to request an increase Line of Credit Facility, Amount Outstanding Amount outstanding Variable rate basis Debt Instrument, Basis Spread on Variable Rate Variable rate basis spread (as a percent) Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Represents activity related to 0.75% Convertible Senior Notes due 2019 (the "2019 Notes"). Convertible Senior Notes Due2019 [Member] 2019 Notes Debt Instrument, Face Amount Face amount of debt issued Debt Instrument, Interest Rate, Stated Percentage Interest rate, as a percent Long-term Debt, Gross Carrying amount of debt Deferred Finance Costs, Noncurrent, Net Capitalized finance fees Debt Instrument, Convertible, Conversion Ratio Conversion ratio Debt Instrument, Convertible, Conversion Price Conversion price Represents the purchase price of debt to be repurchased expressed as a percentage of the principal amount of the repurchased debt. Debt Instrument, Repurchase Price as a Percentage of Principal Amount Repurchased Repurchase price, expressed as a percentage of principal of debt repurchased Debt Instrument, Interest Rate, Effective Percentage Effective Interest Rate (as a percent) Long-term Debt, Fair Value Fair value of debt Interest Expense, Debt Interest expense Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Domain] Loss Contingency, Nature [Domain] Represents the contingencies related to a third party's asserted infringement of patents by the entity. Infringement Of Patents [Member] Infringement of patents Loss Contingencies [Line Items] Legal Matters Loss Contingency, Number of Plaintiffs Number of former shareholders Represents activity related to Vox movili ("Vox"), a French company. Vox Mobili [Member] Vox mobili ("Vox") Represents activity related to Clarity OSS Limited ("Clarity"), an Australian company. Clarity Oss Limited [Member] Clarity OSS Limited ("Clarity") Customer Relationships [Member] Customer relationships