Document and Company Information. Document And Entity Information [Abstract] Document and Entity Information Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net Accounts receivable, net Inventory, Net Total inventories, net Inventories Income Taxes Receivable, Current Income taxes receivable Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred income tax asset, current Deferred Tax Assets, Net, Current, Total Deferred income taxes, current Direct and incremental costs (such as hardware, installation costs and other direct costs) associated with deferred revenue, and sales commission that has been paid but for which associated revenue was deferred at the period end. Deferred costs and prepaid commissions Deferred costs and prepaid commissions Prepaid Expense, Current Prepaid expenses Prepaid expenses Other Assets, Current Other current assets Other current assets Assets, Current Total current assets Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment, net Deferred Tax Assets, Net, Noncurrent Deferred income tax asset, net, noncurrent Deferred Tax Assets, Net, Noncurrent, Total Deferred income tax assets, net, noncurrent Other Assets, Noncurrent Other Assets, Noncurrent, Total Other assets Goodwill Balance at September 30, 2011 Balance at December 31, 2010 Goodwill, Total Intangible Assets, Net (Excluding Goodwill) Total intangible assets, Net Intangible assets, net Intangibles assets, net Assets Total assets Liabilities and Stockholders' Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts Payable, Current, Total Accounts payable Accrued Liabilities, Current Accrued expenses Accrued expenses, Total Accrued expenses, Total Employee-related Liabilities, Current Employee-related Liabilities, Current, Total Accrued compensation and related expenses Deferred Revenue, Current Deferred Revenue, Current, Total Current portion of deferred revenues Liabilities, Current Total current liabilities Total current liabilities Deferred Tax Liabilities, Noncurrent Deferred income tax liabilities, noncurrent Deferred Revenue, Noncurrent Deferred Revenue, Noncurrent, Total Long-term portion of deferred revenues Other Liabilities, Noncurrent Total Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies 2009 Commitments and Contingencies (Note 10) Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock, without par value, 200,000,000 shares authorized; 69,253,624 and 68,617,232 shares issued and outstanding, respectively Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income Accumulated other comprehensive income (loss) Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total shareholders' equity Liabilities and Stockholders' Equity Total liabilities and shareholders' equity Common Stock, No Par Value Common stock, without par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Condensed Consolidated Statements Of Operations [Abstract] Total revenues from external customers Total revenues Total revenues from external customers Revenues Cost of Goods and Services Sold [Abstract] Cost of sales: Cost of Goods Sold Cost of Goods Sold, Total Cost of goods sold Cost of Goods Sold, Amortization Amortization of intangible assets Amortization of intangible assets Cost of Goods and Services Sold Total cost of sales Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses: Research and Development Expense (Excluding Acquired in Process Cost) Research and development Selling and Marketing Expense Selling and Marketing Expense, Total Sales and marketing General and Administrative Expense General and Administrative Expense, Total General and administrative Finite-Lived Intangible Assets, Amortization Expense Amortization of intangible assets Amortization of intangible assets Restructuring Charges Restructuring charges Pre-tax restructuring charges Restructuring Charges, Total Restructuring and other Business Combination, Acquisition Related Costs Acquisition-related expenses Acquisition-related expenses Expenses associated with acquisitions Operating Expenses Total operating expenses Operating Income (Loss) Income (loss) from operations Income from operations Nonoperating Income (Expense) Other income (expense), net Total other income (expense), net Other expense, net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income (loss) before income taxes Income (loss) from operations before provision for (benefit from) income taxes Loss recorded Income Tax Expense (Benefit) Provision for (benefit from) income taxes Tax expense (benefit) Provision for (benefit from) income taxes Provision for (benefit from) income taxes Basic income from operations per share, Basic income (loss) from operations per share, Income from Operations (Numerator) Net income (loss) Net income (loss) Net income Earnings Per Share [Abstract] Earnings (Loss) Per Share Earnings (loss) per share: Earnings Per Share, Basic Basic income (loss) from operations Per-Share Amount Earnings Per Share, Basic, Total Basic Earnings Per Share, Diluted Diluted income (loss) from operations Per-Share Amount Earnings Per Share, Diluted, Total Diluted Weighted Average Number Of Shares Outstanding [Abstract] Weighted average number of shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic income (loss) from operations per share, Shares (Denominator) Weighted Average Number of Shares Outstanding, Basic, Total Basic Weighted Average Number of Shares Outstanding, Diluted Diluted income (loss) from operations per share, Shares (Denominator) Weighted Average Number of Shares Outstanding, Diluted, Total Diluted Condensed Consolidated Statements Of Comprehensive Income (Loss) [Abstract] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss): Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments Foreign currency translation adjustments Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income (loss) Condensed Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Marketable Securities, Gain (Loss) Gain on investments carried at fair value, net Marketable Securities, Gain (Loss), Total Gain on investments carried at fair value, net Provision for Doubtful Accounts Provision for (recovery of) doubtful accounts and returns Provision for (recovery of) doubtful accounts and returns Product Warranty Expense Provision, net Provision for (reduction of) warranty Inventory Write-down Inventory write downs Gain (Loss) on Sale of Property Plant Equipment Loss on disposal of fixed assets Gain (Loss) on Sale of Property Plant Equipment, Total Loss on disposals of fixed assets Depreciation Depreciation, Total Depreciation Amortization of Intangible Assets Amortization of intangible assets Amortization of intangible assets Other Amortization of Deferred Charges Amortization, other Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Deferred income taxes Share-based Compensation Stock-based compensation expense Total Stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of effect of acquisitions: Increase (Decrease) in Accounts Receivable Accounts receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Inventories, Total Inventories Increase (Decrease) in Deferred Charges Deferred costs Deferred costs Increase (Decrease) in Prepaid Expense Prepaid expenses Increase (Decrease) in Other Operating Assets Other current assets Increase (Decrease) in Other Operating Assets, Total Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Total Accounts payable Increase (Decrease) in Other Accrued Liabilities Accrued expenses Increase (Decrease) in Employee Related Liabilities Increase (Decrease) in Employee Related Liabilities, Total Accrued compensation and related expenses Increase (Decrease) in Deferred Revenue Deferred revenues Increase (Decrease) in Income Taxes Receivable Income taxes receivable Income taxes receivable Increase (Decrease) in Accrued Income Taxes Payable Income taxes payable Income taxes payable Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Total adjustments Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Proceeds from Sale, Maturity and Collections of Investments Sale of investments on its adjusted carrying value Proceeds from Sale, Maturity and Collections of Investments, Total Proceeds from sales and maturities of investments Payments to Acquire Businesses, Net of Cash Acquired Purchase of acquired business, net of cash acquired Acquisition of companies for cash consideration, total Payments to Acquire Businesses, Net of Cash Acquired, Total Acquisition, net of cash acquired Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Purchases of property and equipment Purchases of property and equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total Proceeds from issuances of common stock Payments Related to Tax Withholding for Share-based Compensation Payments of net share-settled payroll taxes related to equity awards Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash Effect of exchange rate changes on cash Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents, Period Increase (Decrease), Total Net change in cash and cash equivalents Net change in cash and cash equivalents Basis Of Presentation And Changes In Significant Accounting Policies [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis Of Presentation And Changes In Significant Accounting Policies Basis Of Presentation And Changes In Significant Accounting Policies Acquisitions [Abstract] Business Combination Disclosure [Text Block] Acquisitions Restructuring And Other Costs [Abstract] Restructuring and Related Activities Disclosure [Text Block] Restructuring And Other Costs Other Income And Expense [Abstract] Other Income and Other Expense Disclosure [Text Block] Other Income And Expense Fair Value Of Financial Instruments [Abstract] Fair Value Disclosures [Text Block] Fair Value Of Financial Instruments Derivative Instruments And Hedging Activities [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments And Hedging Activities Financial Statement Details. Financial Statement Details [Abstract] Disclosure providing further detail for certain balance sheet and income statement items. Financial Statement Details Text Block Financial Statement Details Intangible Assets And Goodwill [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Intangible Assets And Goodwill Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Operating Segment Information [Abstract] Segment Reporting Disclosure [Text Block] Operating Segment Information Earnings Per Share [Text Block] Earnings Per Share Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Basis of Accounting Basis Of Presentation Basis Of Presentation And Changes In Significant Accounting Policies Business Acquisition, Pro Forma Information [Text Block] Condensed Pro-Forma Financial Results Schedule of Restructuring Reserve by Type of Cost [Text Block] Summary Of Restructuring Activities And Remaining Obligations Summary of restructuring activities and remaining obligations Schedule of Other Nonoperating Expense, by Component [Text Block] Components Of Other Income (Expense), Net Fair Value, by Balance Sheet Grouping [Text Block] Schedule Of Financial Instruments Carried At Fair Value Financial instruments carried at fair value Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block] Summary Of The Effect Of Derivative Instruments On The Condensed Consolidated Statements Of Operations Schedule of Accounts, Notes, Loans and Financing Receivable [Text Block] Schedule Of Accounts Receivable, Net Inventory Disclosure [Text Block] Schedule Of Inventories Schedule of Accrued Liabilities [Table Text Block] Schedule Of Accrued Expenses Schedule of Other Assets and Other Liabilities [Table Text Block] Schedule Of Other Long-Term Liabilities Intangible Assets Disclosure [Text Block] Intangible Assets Future Amortization Expense Intangible Assets Finite Lives Text Block Future Amortization Expense Of Purchased Intangible Assets With Finite Lives Schedule of Goodwill [Text Block] Changes In The Carrying Amount Of Goodwill Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Text Block] Schedule Of Stock-Based Compensation Expense Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services [Text Block] Schedule Of Revenues From External Customers By Product, Warranty And Support, And Services Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Text Block] Schedule Of Revenues From External Customers By Geographic Regions Schedule of Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Text Block] Schedule Of Long-Lived Assets By Geographic Region Reconciliation of the Numerators and Denominators of The Basic and Diluted Earnings Loss Per Share [Text Block] Reconciliation Of The Numerators And Denominators Of The Basic And Diluted Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Text Block] Common Stock Equivalents Excluded From The Earnings Per Share Computation Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Camiant Member. Camiant Member Camiant [Member] Blueslice. Blueslice Member Blueslice [Member] Blueslice [Member] Business Acquisition [Line Items] Business Acquisition, Pro Forma Revenue Revenues Business Acquisition, Pro Forma Net Income (Loss) Net Income Business Acquisition, Pro Forma Earnings Per Share, Basic Basic earnings per share Business Acquisition, Pro Forma Earnings Per Share, Diluted Diluted earnings per share Schedule of Restructuring and Related Costs [Table] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual [Axis] Title of Individual with Relationship to Entity [Domain] Former President And Chief Executive Officer [Member] Former President And Chief Executive Officer Member Former President And Chief Executive Officer [Member] Former Executive Vice President [Member] Former Executive Vice President Member Former Executive Vice President [Member] Range [Axis] Range [Domain] Maximum [Member] Minimum [Member] Restructuring Cost and Reserve [Line Items] An estimate of the expected reductions in overall headcount in the U.S. and the consolidation of positions from various global locations; in addition, subject to employee information and consultation processes, reductions in positions in foreign countries. Restructuring And Other Costs Expected Workforce Reduction Overall expected workforce reduction Restructuring and Related Cost, Expected Cost Restructuring and Related Costs, Expected Cost, Total Restructuring and other costs, estimated costs, total Restructuring Cost and Reserve [Axis] Type of Restructuring [Domain] Computer And Research And Development Lab Equipment [Member] Computer And Research And Development Lab Equipment Member Computer And Research And Development Lab Equipment [Member] Restructuring Reserve Ending restructuring obligations Beginning restructuring obligations Restructuring Reserve, Total Restructuring obligations, December 31, 2010 Restructuring and Related Cost, Incurred Cost 2011 Restructuring and related expenses Restructuring and Related Costs, Incurred Cost, Total Restructuring Reserve, Settled with Cash Cash payments Restructuring Reserve, Settled with Cash, Total Cash payments Restructuring Reserve, Translation Adjustment Restructuring Reserve, Translation Adjustment, Total Effect of exchange rate changes Investment Income, Interest Interest income Interest Expense Interest expense Interest Expense, Total Interest expense Foreign Currency Transaction Gain (Loss), before Tax Foreign Currency Transaction Gain (Loss), before Tax, Total Foreign currency gain (loss), net Other Nonoperating Income (Expense) Other, net Other, net Cash and Cash Equivalents, Fair Value Disclosure Cash and cash equivalents Derivative [Table] Derivative, by Nature [Axis] Derivative, Name [Domain] Purchase [Member] Purchase Member Purchase [Member] Sell [Member] Sell Member Sell [Member] Derivative [Line Items] Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Notional amounts of the outstanding foreign currency forward contracts A measure designed to show level of activity in derivative instruments during the reporting period: the average value, by underlying currency, of derivative contracts outstanding during the reporting period calculated as the total notional amount of all contracts taken out during the period divided by the number of these contracts. Average Notional Amount of Foreign Currency Derivatives Average notional amount of foreign currency derivatives Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement and Other Comprehensive Income Location [Domain] Other Income (Expense), Net [Member] Other Income Expense Net Member Other Income (Expense), Net [Member] Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Domain] Derivatives Not Designated As Hedging Instruments [Member] Derivative Instruments, Gain (Loss) by Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Foreign Currency Forward Contracts [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) Recognized in Income, Net Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total Amount of Gain or (Loss) Recognized in Results of Operations Accounts Receivable, Gross, Current Accounts receivable Allowance for Doubtful Accounts Receivable, Current Balance at June 30, 2011 Balance at December 31, 2010 Less: Allowance for doubtful accounts and sales returns Less: Allowance for doubtful accounts and sales returns Inventory, Raw Materials and Supplies, Net of Reserves Inventory, Raw Materials and Supplies, Net of Reserves, Total Raw materials Inventory, Finished Goods, Net of Reserves Finished goods Finished goods Accrued installation and professional services costs. Accrued Installation And Professional Services Costs Accrued installation and professional services costs Deferred Rent Credit, Current Deferred rent Restructuring Reserve, Current Accrued restructuring Taxes Payable, Current Accrued property, sales and other taxes Taxes Payable, Current, Total Provision for Loss on Contracts Accrued losses on customer contracts Accrued foreign currency contract settlements. Accrued Foreign Currency Contract Settlements Accrued foreign currency contract settlements Product Warranty Accrual Ending Balance Beginning Balance Product Warranty Accrual, Total Accrued warranty costs Accrued Professional Fees, Current Accrued professional fees and legal accrual Other Accrued Liabilities, Current Accrued other Restructuring Reserve, Noncurrent Accrued restructuring Other Sundry Liabilities, Noncurrent Other long-term liabilities Schedule of Finite-Lived Intangible Assets by Major Class [Table] Indefinite-lived Intangible Assets by Segment [Axis] Indefinite-lived Intangible Assets, Segment [Domain] Intangible Assets Associated With The Steleus And Iptelorg Acquisitions [Member] Intangible Assets Associated With Steleus And Iptelorg Acquisitions Member Intangible Assets Associated With The Steleus And Iptelorg Acquisitions [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Purchased technology. Purchased Technology Member Purchased Technology [Member] Customer Relationships [Member] Contract Backlog [Member] Non-Compete Agreements [Member] In Process Research And Development With Finite Lives [Member] In Process Research And Development With Finite Lives Member IPR&D, With Finite Lives [Member] Trademarks and trade names. Trademarks And Trade Names Member Trademarks And Trade Names [Member] In Process Research And Development With Indefinite Lives [Member] In Process Research And Development With Indefinite Lives Member IPR&D, With Indefinite Lives [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Gross Total intangible assets with finite lives, Gross Finite-Lived Intangible Assets, Gross, Total Intangible assets with finite lives, Gross Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets with finite lives, Accumulated Amortization Intangible assets with finite lives, accumulated amortization Finite-Lived Intangible Assets, Net Total intangible assets with finite lives, Net Finite-Lived Intangible Assets, Net, Total Intangible assets with finite lives, Net Reflects net changes to the recorded value of gross intangible assets for foreign currency translation adjustments. Effect of exchange rate changes, gross Effect of exchange rate changes, Gross Effect of exchange rate changes, Gross Reflects net changes to the accumulated amortization of intangible assets for foreign currency translation adjustments. Effect Of Exchange Rate Changes Accumulated Amortization Effect of exchange rate changes, accumulated amortization Effect of exchange rate changes accumulated amortization Effect of exchange rate changes, Accumulated Amortization Reflects net changes to the recorded value of net intangible assets for foreign currency translation adjustments. Effect Of Exchange Rate Changes Net Effect of exchange rate changes, Net Effect of exchange rate changes, Net Indefinite-lived Intangible Assets Indefinite-lived Intangible Assets, Ending Balance Indefinite-lived Intangible Assets, Beginning Balance IPR&D, with indefinite lives, Gross Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill), Total IPR&D, with indefinite lives, Net Intangible assets gross excluding goodwill. Intangible Assets Gross Excluding Goodwill Total intangible assets, Gross Acquired Finite-lived Intangible Asset, Weighted Average Useful Life Remaining weighted average life Estimated Weighted Average Life in Years The calculated weighted-average useful life of all finite-lived intangible assets revised as a result of evaluating the remaining useful lives of certain intangible assets. Revised Estimated Useful Life Of Definite Lived Intangible Asset Revised estimated useful life of finite lived intangible assets, years Future Amortization Expense, Remainder of Fiscal Year 2011 (remaining three months) Future Amortization Expense, Year One 2012 Future Amortization Expense, Year Two 2013 Future Amortization Expense, Year Three 2014 Future Amortization Expense, Year Four 2015 Finite-Lived Intangible Assets, Future Amortization Expense Total Goodwill, Translation and Purchase Accounting Adjustments Effect of exchange rate changes Effect of exchange rate changes Percent the fair value of the reporting unit exceeded its net book value determined as a result of the interim goodwill impairment analysis. Percent Of Fair Value Over Net Book Value Percent of fair value of the reporting unit exceeded its net book value by over Effective Income Tax Rate Continuing Operations Effective Income Tax Rate, Continuing Operations, Total Effective tax rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Statutory rate This amount represents a discrete tax benefit and anticipated refund that resulted from the filing of amended state tax returns in the state of North Carolina. Discrete Tax Benefit From State Tax Filings Discrete tax benefit from state tax filings Discrete tax benefit from state tax filings Income Tax Reconciliation, Nondeductible Expense, Share-based Compensation Cost Discrete tax expense resulting from employee stock option cancellations Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance Discrete tax expense related to the establishment of a valuation allowance 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, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost Of Goods Sold [Member] Cost of goods sold [Member] Research and development. Research And Development Member Research And Development [Member] Research and development [Member] Sales And Marketing [Member] Sales and marketing [Member] General And Administrative [Member] General and administrative [Member] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Options And Sar Grants And Stock Purchase Rights Member. Options And Sar Grants And Stock Purchase Rights Member Option And SAR Grants And Stock Purchase Rights [Member] Options and SAR Grants and Stock Purchase Rights [Member] RSUs [Member] RSUs [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocated Share-based Compensation Expense Stock-Based Compensation Stock-based compensation expense Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Table] Major Customers [Axis] Name of Major Customer [Domain] At And T Member. At And T Member AT & T [Member] AT & T [Member] Carso Global Telecom [Member] Carso Global Telecom Member Carso Global Telecom [Member] Verizon. Verizon Member Verizon [Member] Brazil [Member] Brazil Member Brazil [Member] Statement, Geographical [Axis] Segment, Geographical [Domain] India. India Member India [Member] India [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues Entity Wide Revenue Major Customer Percentage Percentage of sales revenue from major customer Percentage of revenue from external customers attributed to an individual foreign country from which revenue is material. Entity Wide Revenue Major Geographical Area Percentage Percentage of sales revenue from major geographical region Reconciliation of Revenue from Segments to Consolidated [Table] Warranty And Support Revenues [Member] Warranty And Support Revenues Member Warranty And Support Revenues [Member] Professional and other services revenues. Professional And Other Services Revenues Member Professional And Other Services Revenues [Member] Professional and other services revenues [Member] Segment Reporting, Revenue Reconciling Item [Line Items] Sales Revenue, Goods, Net Sales Revenue, Goods, Net, Total Product revenues Sales Revenue, Services, Net Sales revenue services Sales Revenue, Services, Net, Total Warranty and support revenues Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile United States Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries International International Entity Wide Disclosure On Geographic Areas Long Lived Assets In Entitys Country Of Domicile United States Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount Other Other Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in the entity's country of domicile and foreign countries. Entity Wide Disclosure On Geographic Areas Long Lived Assets In Entities Country Of Domicile And Foreign Countries Amount Total long-lived assets Dilutive Securities Dilutive Securities, Total Effect of dilutive securities, Income from Operations (Numerator) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted Average Number Diluted Shares Outstanding Adjustment, Total Effect of dilutive securities, Shares (Denominator) Net Income (Loss) Available to Common Stockholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted, Total Diluted income (loss) from operations per share, Income from Operations (Numerator) Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average number of stock options, SARs and RSUs, calculated using the treasury stock method, that were excluded due to the exercise/threshold price exceeding the average market price of our common stock during the period Total common stock equivalents excluded from diluted net income (loss) per share computation Common stock equivalents excluded from diluted net income (loss) per share computation Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Transaction value, per share amount. Transaction Value Per Share Amount Member Transaction Value, Per Share Amount [Member] Subsequent Event [Line Items] Subsequent Event, Amount Transaction value, total amount Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Weighted average number of stock options, SARs and RSUs excluded due to reporting of net loss [Member]. Weighted Average Number Of Stock Options Sars And Rsus Excluded Due To Reporting Of Net Loss Member Weighted Average Number Of Stock Options, SARs And RSUs Excluded Due To Reporting Of Net Loss [Member] Weighted average number of stock options, SARs and RSUs, excluded due to the exercise/threshold price exceeding the average market price of common stock [Member]. Weighted Average Number Of Stock Options Sars And Rsus Excluded Due To Exercise Threshold Price Exceeding Average Market Price Of Common Stock Member Weighted Average Number Of Stock Options, SARs And RSUs, Excluded Due To The Exercise/Threshold Price Exceeding The Average Market Price Of Common Stock [Member]