Products Services and support Total revenue Products Services and support Total cost of revenue Gross profit Sales and marketing General and administrative Restructuring charges Amortization of purchased intangibles Total operating expenses Operating income Interest expense Investment gains (losses), net Income before income taxes Provision for income taxes Net Income (Loss) Attributable to Parent Net income Net income (loss) Net income Net income Basic net income per share Basic net income (loss) per share Shares used in computing basic net income per share Diluted net income per share Diluted net income (loss) per share Shares used in computing diluted net income per share Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Total cash and cash equivalents Total cash and cash equivalents Cash and cash equivalents Short-term Investments Total short-term investments Total short-term investments Short-term investments Trade receivables, net of allowances for doubtful accounts of $14,295 and $15,225, respectively Accounts Receivable, Net, Current Trade receivables, net of allowances for doubtful accounts of $6,153 and $4,128, respectively Allowances for doubtful accounts Deferred income taxes Prepaid expenses and other assets Prepaid expenses other assets Prepaid expenses and other current assets Total current assets Property and equipment, net Purchased and other intangibles, net Other assets Total assets Total current liabilities Deferred revenue Debt Deferred revenue Deferred income taxes Other liabilities Total liabilities Preferred stock, $0.0001 par value; 2,000 shares authorized, none issued Common stock, $0.0001 par value; 900,000 shares authorized; 600,834 shares issued; 525,068 and 522,657 shares outstanding, respectively Common Stock, Value, Issued Common Stock, Value, Ending Balance Common Stock, Value, Beginning Balance Common stock, $0.0001 par value; 900,000 shares authorized; 600,834 shares issued; 524,665 and 526,111 shares outstanding, respectively Additional paid-in-capital Retained Earnings (Accumulated Deficit) Ending Balance Begining Balance Retained earnings Retained earnings Total accumulated other comprehensive income, net of taxes Treasury Stock, Value Treasury stock, at cost (75,052 and 78,177 shares, respectively), net of reissuances Treasury stock, at cost (75,766 and 78,177 shares, respectively), net of reissuances Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Treasury stock, at cost (76,169 and 74,723 shares, respectively), net of reissuances Total stockholders' equity Total liabilities and stockholders' equity Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Depreciation, amortization and accretion Stock-based compensation Excess tax benefits from stock-based compensation Deferred revenue Net cash provided by operating activities Purchases of short-term investments Proceeds from sales of short-term investments Purchases of property and equipment Net cash used for investing activities Net increase in cash and cash equivalents Effect of foreign currency exchange rates on cash and cash equivalents Net cash provided by financing activities Proceeds from issuance of treasury stock ` Payments for Repurchase of Common Stock Purchases of treasury stock financial institution Purchases of treasury stock Excess tax benefits from stock-based compensation Cash paid for interest Cash paid for income taxes, net of refunds Prepaid expenses and other current assets Accrued expenses Total non-operating income (expense), net Accrued restructuring, noncurrent Accrued restructuring Expenses, Noncurrent Accrued restructuring Income taxes payable Treasury stock, shares Significant Accounting Policies [Text Block] BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Goodwill and Purchased and Other Intangibles Stock-Based Compensation Commitments and Contingencies Fair Value Measurements Segments Income taxes payable Trade receivables Trade payables Research and development Proceeds from sale of long-term investments Non-Operating Income (Expense) Accrued restructuring Other Assets Beginning Balance Ending Balance Other Nonoperating Income Interest and other income (expense), net Interest and other income (expense), net Deferred income taxes Repayment of borrowings under credit facility Accrued Restructuring Expenses Current Accrued restructuring Expenses, Current Accrued restructuring Goodwill and Purchased and Other Intangibles. Goodwill and Purchased and Other Intangibles [Abstract] Accrued Expenses. Accrued Expenses [Abstract] Commitments and Contingencies. Commitments and Contingencies [Abstract] Investment in lease receivable. Investment in lease receivable Non-Operating Income (Expense) [Abstract] Operating expenses: Total cost of revenue: Revenue: Liabilities and Stockholders' Equity Assets [Abstract] Assets Assets: Stockholders Equity [Abstract] Stockholders' equity: Stockholders equity [Abstract] Stockholders' Equity (Numeric) [Abstract] Long-term liabilities: Current liabilities: Supplemental disclosures: Cash flows from financing activities: Cash flows from investing activities: Cash flows from operating activities: Changes in operating assets and liabilities, net of acquired assets and liabilities: Goodwill and Purchased and Other Intangibles [Abstract] Accrued Expenses [Abstract] Commitments and Contingencies [Abstract] Investment in lease receivable Prepaid expenses and other current assets Accrued restructuring Accrued restructuring Goodwill and Purchased and Other Intangibles [Abstract] Accrued Expenses [Abstract] Commitments and Contingencies [Abstract] Reconciliation Balances for Investments of Limited Partnership Purchased and Other Intangible Assets Other Assets Schedule of Restructuring and Related Costs [Text Block] Summary of Restructuring Plans Segment Reporting STOCK-BASED COMPENSATION Total current assets Current assets: Deferred income taxes Property and equipment, net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Purchased and other intangibles, net Liabilities and Stockholders' Equity Current liabilities: Total current liabilities Long-term liabilities: Debt Deferred revenue Income taxes payable Deferred income taxes Total liabilities Preferred stock, $0.0001 par value; 2,000 shares authorized, none issued Preferred Stock, Value, Beginning Balance Preferred Stock, Value, Ending Balance Additional paid-in-capital Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Ending Balance Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Revenue: Products Services and support Cost of revenue: Products Gross profit Operating expenses: Research and development Sales and marketing General and administrative Restructuring charges Operating income Non-operating income (expense): Interest expense Income before income taxes Cash flows from operating activities: Depreciation, amortization and accretion Stock-based compensation Deferred income taxes Excess tax benefits from stock-based compensation Changes in operating assets and liabilities, net of acquired assets and assumed liabilities: Trade receivables, net Prepaid expenses and other current assets Trade payables Accrued expenses Accrued expenses Accrued restructuring Income taxes payable Cash flows from investing activities: Purchases of short-term investments Proceeds from sales of short-term investments Purchases of property and equipment Proceeds from sale of long-term investments Proceeds from sale of long-term investments Cash flows from financing activities: Proceeds from issuance of treasury stock Excess tax benefits from stock-based compensation Repayment of borrowings Supplemental disclosures: Allowances for doubtful accounts Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Allowance for Doubtful Accounts Receivable, Current, Ending Balance Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Treasury stock, shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance FAIR VALUE MEASUREMENTS GOODWILL AND PURCHASED AND OTHER INTANGIBLES COMMITMENTS AND CONTINGENCIES NON-OPERATING INCOME (EXPENSE) SEGMENTS Net increase in cash and cash equivalents Purchases of long-term investments and other assets Purchases long-term investments other assets Purchases of long-term investments and other assets. Interest expense Interest Expense Purchases of short-term investments Payments to Acquire Short-term Investments Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of long-term investments and other assets Repayment of debt Repayments of Lines of Credit Other non-cash items Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Other Trade payables Trade payables Accounts Payable, Current Accrued expenses Accrued expenses Accrued Liabilities, Current Income taxes payable Income taxes payable Accrued Income Taxes, Current Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Other Assets, Noncurrent [Text Block] Acquisitions [Abstract] Acquisitions [Abstract] Acquisitions. ACQUISITIONS Business Combination Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Document and Entity Information [Abstract] Document And Entity Information. Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Cash, Cash Equivalents and Short Term Investments (Tables) [Abstract] Cash, Cash Equivalents and Short Term Investments (Table) [Abstract] Cash, Cash Equivalents and Short Term Investments (Table) [Abstract] Cash, Cash Equivalents and Short Term Investments. Cash, Cash Equivalents and Short-term Investments (Details) [Abstract] Cash, Cash Equivalents and Short-term Investments (Details) [Abstract] Cash, cash equivalents and short-term investments. Goodwill and Purchased and Other Intangibles (Tables) [Abstract] Goodwill and Purchased and Other Intangibles (Tables) [Abstract] Goodwill And Purchased And Other Intangibles. Goodwill and Purchased and Other Intangibles (Details) [Abstract] Goodwill and Purchased and Other Intangibles (Details) [Abstract] Goodwill and Purchased and Other Intangibles. Other Assets (Details) [Abstract] Other Assets (Details) [Abstract] Other Assets. Accrued Expenses (Table) [Abstract] Accrued Expenses (Table) [Abstract] Accrued expenses. Accrued Expenses (Details) [Abstract] Accrued Expenses (Details) [Abstract] Accrued Expenses. Stock-Based Compensation (Tables) [Abstract] Stock Based Compensation (Tables) [Abstract] Stock Based Compensation. Stock Based Compensation (Details) [Abstract] Stock Based Compensation (Details) [Abstract] Stock Based Compensation. Restructuring (Details) [Abstract] Restructuring (Details) [Abstract] Restructuring Charges. Net Income Per Share (Tables) [Abstract] Net Income Per Share (Tables) [Abstract] Net Income Per Share. Net Income Per Share (Details) [Abstract] Net Income Per Share (Details) [Abstract] Net Income Per Share Details. ACCRUED EXPENSES Accrued Expenses Accrued expenses. Schedule of Finite-Lived Intangible Assets by Major Class [Text Block] Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities Available-for-sale Securities [Text Block] Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities Prior Year Cost and Estimated Fair Value of Debt Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Text Block] Segment Reporting NET INCOME PER SHARE Earnings Per Share [Text Block] Accumulated Other Comprehensive Income, Net of Taxes Accumulated Other Comprehensive Income, Net of Taxes Accumulated other comprehensive income, net of taxes. Financial Assets and Liabilities at Fair Value on Recurring Basis Financial Assets and Liabilities at Fair Value on Recurring Basis Prior Year Fair Value By Balance Sheet Grouping [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Text Block] Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block] Non Operating Income Expense (Details) [Abstract] Non-Operating Income (Expense) (Details) [Abstract] Non-Operating Income Expense. Assumptions Used to Value Option Grants Assumptions Used to Value Option Grants Assumptions Used To Value Option Grants. Stock Options Outstanding Stock Options Outstanding Stock Options Outstanding. Restricted Stock Unit Activity Restricted Stock Unit Activity Restricted Stock Unit Activity. Restricted Stock Units Outstanding Restricted Stock Units Outstanding Restricted Stock Units Outstanding. Total accrued expenses Accrued Expense [Abstract] Accrued Expense [Abstract] Accrued Expenses. Assumptions Used to Value Option Grants [Abstract] Assumptions Used to Value Option Grants [Abstract] Assumptions Used to Value Option Grants. Restricted Stock Unit Activity [Abstract] Restricted Stock Unit Activity [Abstract] Restricted Stock Unit Activity. Cost of Revenue Revenue Segment Reporting Information, Revenue, Total Segment Reporting Information, Revenue Interest income Investment Income, Interest Foreign exchange losses Foreign Currency Transaction Gain (Loss), before Tax, Total Foreign Currency Transaction Gain (Loss), before Tax Interest expense Interest Expense, Debt Realized investment gains Realized investment gains Realized investment gains. Unrealized investment gains Unrealized investment gains Unrealized investment gains. Realized investment losses Realized investment losses Realized investment losses. Unrealized investment losses Unrealized investment losses Unrealized investment losses. Unvested restricted stock and performance share awards Unvested restricted stock and performance share awards Unvested restricted stock and performance share awards. Shares used to compute basic net income per share Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Diluted net income per share Earnings Per Share, Diluted Other Comprehensive Income, Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized gains (losses) on derivative instruments Unrealized gains (losses) on derivative instruments Foreign currency translation adjustments Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income loss Other comprehensive income (loss). Other comprehensive income (loss) Reclassification adjustment for (gains) losses on derivative instruments recognized during the period Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Reclassification adjustment for (gains) losses on derivative instruments recognized during the period Reclassification adjustment for (gains) losses on derivative instruments recognized during the period Reclassification adjustment for gains on derivative instruments recognized during the period Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Reclassification adjustment for (gains) losses on available-for-sale securities recognized during the period Reclassification adjustment for (gains) losses on available-for-sale securities recognized during the period Reclassification adjustment for (gains) losses on available-for-sale securities recognized during the period Reclassification adjustment for (gains) losses on available-for-sale securities recognized during the period Total other comprehensive income, net of taxes Total comprehensive income, net of taxes Other Comprehensive Income (Loss), Net of Tax Cash Payments Restructuring Reserve, Settled with Cash Cash Payments Total restructuring costs incurred to date for closing redundant facilities Restructuring and Related Costs, Cost Incurred to Date, Total Restructuring and Related Cost, Cost Incurred to Date Other Other Accrued Liabilities, Current Taxes payable Sales and marketing allowances Sales and marketing allowances. Stock options Incremental Common Shares Attributable to Share-based Payment Arrangements Acquired rights to use technology Acquired rights to use technology Acquired rights to use technology. Investments Investments Investments noncurrent Prepaid land lease Prepaid land lease Prepaid land lease. Other Other Other. Security and other deposits Deposit Assets, Total Deposit Assets Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Other assets Other Assets, Noncurrent Cost Finite-Lived Intangible Assets, Gross, Total Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Net Remainder of 2010 Future Amortization Expense, Year One 2011 Future Amortization Expense, Year Two 2012 Future Amortization Expense, Year Three 2013 Future Amortization Expense, Year Four 2014 Future Amortization Expense, Year Five Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases and sales of investments, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements Unrealized net investment losses included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Fair Value Asset Derivatives, Designated Derivative Asset Designated as Hedging Instrument, Fair Value Fair Value Asset Derivatives, Not Designated Derivative Asset Not Designated as Hedging Instrument, Fair Value Total Derivatives, Asset Derivative Asset, Fair Value Fair Value Liability Derivatives, Designated Derivative Liability Designated as Hedging Instrument, Fair Value Fair Value Liability Derivatives, Not Designated Derivative Liability Not Designated as Hedging Instrument, Fair Value Total Derivatives, Liability Derivative Liability, Fair Value