Accounts Payable and Accrued Liabilities Disclosure [Text Block] Other Accrued Liabilities Accounts Receivable, Net, Current Accounts receivable, net of allowance of $1,182 and $1,896 as of December 31, 2010 and March 31, 2011, respectively Payments to Acquire Businesses, Net of Cash Acquired Purchase of business, net of cash acquired Additional Paid in Capital Additional paid-in capital Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowance (in dollars) Assets of Disposal Group, Including Discontinued Operation, Current Current assets of discontinued operations Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Increase (Decrease) in Accounts Payable and Accrued Liabilities (Decrease) increase in accounts payable and accrued and other liabilities Increase (Decrease) in Accounts Receivable (Increase) decrease in accounts receivable, net Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Increase in prepaid expenses and other assets Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.01 par value, 300,000 shares authorized, 191,825 and 192,562 shares issued as of December 31, 2010 and March 31, 2011, respectively, and 108,382 and 107,012 shares outstanding as of December 31, 2010 and March 31, 2011, respectively Comprehensive Income, Net of Tax, Attributable to Parent Total comprehensive income Cost of revenues Liabilities, Current [Abstract] Current liabilities: Liabilities, Current Total current liabilities Deferred Revenue, Current Deferred revenue Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Business Combination Disclosure [Text Block] Acquisitions Earnings Per Share, Diluted Diluted net income (loss) per share Diluted (in dollars per share) Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Income (Loss) from Equity Method Investments Net losses of equity affiliate Net losses of equity affiliate Share-based Compensation Stock-based compensation Gain (Loss) on Investments Gain on investments, net Gain on investments, net Gain on investments, net General and Administrative Expense General and administrative Income (Loss) from Continuing Operations, Per Diluted Share Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Continuing operations (in dollars per share) Income (Loss) from Continuing Operations Attributable to Parent Income (loss) from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Loss from discontinued operations, net of tax Income Tax Disclosure [Text Block] Income Taxes Payments for (Proceeds from) Hedge, Investing Activities Purchase of call options Purchase of call options Intangible Assets, Net (Excluding Goodwill) Purchased intangible assets, net Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Proceeds from Issuance of Senior Long-term Debt Proceeds from issuance of convertible senior notes, net Liabilities of Disposal Group, Including Discontinued Operation, Current Current liabilities of discontinued operations Liabilities and Stockholders' Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Stockholders' Equity. Total liabilities and stockholders' equity Liabilities Total liabilities Marketable Securities, Current Marketable securities Marketable Securities, Noncurrent Long-term marketable securities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities Net cash provided by investing activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Income (Loss) Attributable to Parent Net income (loss) Net income Net income (loss) Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Operating Income (Loss) Income from operations Revenues Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Increase (Decrease) in Other Operating Assets and Liabilities, Net Other Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized holding gains (losses) on certain investments, net of tax Other Assets, Current Other current assets Payments for (Proceeds from) Other Investing Activities Other Proceeds from (Payments for) Other Financing Activities Other financing activities Preferred Stock, Shares Authorized Convertible preferred stock, shares authorized Preferred Stock, Shares Issued Convertible preferred stock, shares issued Prepaid Expense, Current Prepaid expenses Proceeds from Issuance of Warrants Proceeds from issuance of warrants Proceeds from Sale and Maturity of Marketable Securities Sales and maturities of marketable securities Proceeds from Sale and Maturity of Other Investments Proceeds received from investments in other companies Property, Plant and Equipment, Net Property and equipment, net Payments to Acquire Intangible Assets Purchases of subscriber bases Payments to Acquire Marketable Securities Purchases of marketable securities Payments to Acquire Other Investments Investments in other companies Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Related Party Transactions Disclosure [Text Block] Related Party Transactions Payments for Repurchase of Common Stock Repurchases of common stock Restructuring and Related Activities Disclosure [Text Block] Restructuring and Acquisition-Related Costs Cumulative Effect of Initial Adoption of New Accounting Principle Cumulative effect of change in accounting principle Retained Earnings (Accumulated Deficit) Accumulated deficit Sales Revenue, Services, Net Revenues Segment Reporting Disclosure [Text Block] Segment Information Selling and Marketing Expense Sales and marketing Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Goodwill and Intangible Assets Disclosure [Text Block] Purchased Intangible Assets and Goodwill Assets, Current [Abstract] Current assets: Assets, Current Total current assets Treasury Stock Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Common Stock Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Warrants Assets. Total assets Other Liabilities, Noncurrent Other long-term liabilities Deferred Tax Assets, Net, Noncurrent Deferred income taxes, net Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Deferred Tax Assets, Net, Current Deferred income taxes, net Assets [Abstract] ASSETS Fair Value Disclosures [Text Block] Fair Value Measurements Quarterly Financial Information [Text Block] Quarterly Financial Data (Unaudited) Treasury Stock, Value Treasury stock, at cost, 83,443 and 85,550 shares as of December 31, 2010 and March 31, 2011, respectively Cash Flow, Supplemental Disclosures [Text Block] Supplemental Disclosure of Cash Flow Information Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Earnings Per Share, Basic Basic net income (loss) per share Basic (in dollars per share) Adjustments to Additional Paid in Capital, Warrant Issued Issuance of warrants Preferred Stock, Par or Stated Value Per Share Convertible preferred stock, par value (in dollars per share) Common Stock, Shares, Issued Common stock, shares issued Increase (Decrease) in Deferred Revenue (Decrease) increase in deferred revenue Other Assets, Noncurrent Other long-term assets Preferred Stock, Shares Outstanding Convertible preferred stock, shares outstanding Earnings Per Share, Basic [Abstract] Basic net income per share Earnings Per Share, Diluted [Abstract] Diluted net income per share Deferred Income Taxes and Tax Credits Non-cash income taxes Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Treasury Stock, Shares Treasury stock, shares Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Reclassification adjustment for realized gains and losses on certain investments Stockholders' Equity Attributable to Parent Balance Balance Income Tax Expense (Benefit) Income tax provision Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value Convertible preferred stock, $0.01 par value, 100,000 shares authorized, 0 shares issued and outstanding as of December 31, 2010 and March 31, 2011 Additional Paid-in Capital Accumulated Deficit Unrealized Gains (Losses) on Investments Deferred Compensation Goodwill Goodwill Stock Issued During Period, Value, New Issues Issuance of common stock Stock Issued During Period, Value, Acquisitions Issuance of common stock for acquisition of New Edge Stock Issued During Period, Shares, New Issues Issuance of common stock (in shares) Stock Issued During Period, Shares, Acquisitions Issuance of common stock for acquisition of New Edge (in share) Treasury Stock, Shares, Acquired Repurchase of common stock (in shares) Total Comprehensive Income Costs and Expenses [Abstract] Operating costs and expenses: Costs and Expenses Total operating costs and expenses Treasury Stock, Value, Acquired, Cost Method Repurchase of common stock Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation Tax benefit from equity awards Shares, Issued Balance (in shares) Balance (in shares) Accounts Payable, Current Accounts payable Employee-related Liabilities, Current Accrued payroll and related expenses Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease) Investments in and net advances to/from equity affiliate Commitments and Contingencies Commitments and contingencies (See Note 15) Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Other Accrued Liabilities, Current Other accrued liabilities Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value Stock-based compensation expense Long-term investments Long Term Investments, Excluding Marketable Securities, Noncurrent The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle) excluding total debt and equity financial instruments. Impairment of goodwill and intangible assets Impairment of Intangible Assets (Including Goodwill) The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of definite-lived and indefinite-lived intangible assets, including goodwill, to fair value. Adjustments to Additional Paid In Capital, Issuance of Phantom Share Units Issuance of phantom share units This element represents the issuance of phantom share units. Adjustments to Additional Paid in Capital, Reclassification to Deferred Compensation Reclass of deferred compensation This element represents reclass of deferred compensation. Adjustments to Additional Paid in Capital, Exercise of Warrants Exercise of warrants This element represents adjustments to additional paid in capital exercise of warrants. Adjustments to Additional Paid in Capital, Termination of Convertible Note Hedge and Warrant Agreements Termination of convertible note hedge and warrant agreements This element represents termination of convertible note hedge and warrant agreements. Document and Entity Information CONDENSED CONSOLIDATED BALANCE SHEETS CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME Statement [Table] Statement [Line Items] Statement Stockholders' Equity, Period Increase (Decrease) Statement, Equity Components [Axis] Equity Component [Domain] Proceeds from Stock Options Exercised Proceeds from exercises of stock options Investments This item represents the entire disclosure related to 1) Investments in Debt and Marketable Equity Securities and 2) Cost Method Investments. Investments in Certain Debt and Equity Securities include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. The carrying amount of investments accounted for under the cost-method may be adjusted, for example, distributions in excess of cost (return of capital) or for other-than-temporary impairments. Investments [Text Block] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Convertible Notes Payable, Current Convertible senior notes, net of discount of $12,722 and $_ as of December 31, 2010 and March 31, 2011, respectively Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Earnings Per Share [Abstract] Net income per share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding Common Stock, Dividends, Per Share, Declared Dividends declared per share (in dollars per share) Organization Summary of Significant Accounting Policies Earnings per Share Restructuring and Acquisition-Related Costs Investments Purchased Intangible Assets and Goodwill Debt Stockholders' Equity Stock-Based Compensation Income Taxes Fair Value Measurements Segment Information Earnings Per Share [Text Block] Earnings per Share Discontinued Operations Acquisitions Property and Equipment Other Accrued Liabilities Profit Sharing Plans Commitments and Contingencies. Supplemental Disclosure of Cash Flow Information Related Party Transactions Quarterly Financial Data (Unaudited) Payments of Dividends Payment of dividends Gains (Losses) on Extinguishment of Debt Gain on debt surrendered for conversion Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' equity: Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Amortization of debt discount, premium and issuance costs Amortization of debt discount, premium and issuance costs Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Cost of Goods and Services Sold Cost of revenues (exclusive of depreciation and amortization shown separately below) Other Cost and Expense, Operating Operations and customer support Impairment of Long-Lived Assets to be Disposed of Loss on disposals and impairments of fixed assets Debt Disclosure [Text Block] Debt Repayments of Convertible Debt Payment for debt surrendered for conversion Debt Instrument, Unamortized Discount Convertible senior notes, discount (in dollars) Sales Revenue, Net Revenues Interest Expense Income Net Including Other Miscellaneous Items Includes the net of: 1) The cost of borrowed funds accounted for as interest that was charged against earnings during the period; 2) Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money; and 3) The net amount of other nonoperating income and expense, which does not qualify for separate disclosure on the income statement under materiality guidelines. Interest expense and other, net Subsequent Event Schedule of Subsequent Events [Text Block] Subsequent Event Restructuring and acquisition-related costs Restructuring and Acquisition-Related Costs. This element includes restructuring charges and acquisition-related costs. Restructuring charges represent amounts charged against earnings in the period for incurred and estimated costs, excluding asset retirement obligations, associated with exit from or disposal of business activities or restructurings pursuant to a program that is planned and controlled by management, and materially changes either the scope of a business undertaken by an entity, or the manner in which that business is conducted. Acquisition-related costs represent costs to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees. Income from continuing operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Accumulated Other Comprehensive Income (Loss) Dividends paid on shares outstanding and restricted stock units Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Stock Issued During Period, Shares, Period Increase (Decrease) Adjustments to Additional Paid in Capital, Restricted Stock and Stock Options Exercised, Tax withholdings Tax withholdings related to net share settlements of restricted stock units and stock options This element represents the value of tax withholdings related to net share settlements of restricted stock units and stock options. Depreciation, Depletion and Amortization Depreciation and amortization Restricted Cash and Cash Equivalents Restricted cash Senior Notes Long-term debt, including premium of $26,251 and $_ as of December 31, 2010 and March 31, 2011, respectively Selling, General and Administrative Expense Selling, general and administrative (exclusive of depreciation and amortization shown separately below) Stock Issued During Period, Value, Share-based Compensation Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units Stock Issued During Period, Shares, Share-based Compensation Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units (in shares) Debt Instrument, Unamortized Premium Long-term debt, premium (in dollars) Debt Instrument, Decrease, Repayments Debt redemption Valuation Allowance, Deferred Tax Asset, Change in Amount Change in deferred tax asset This element represents restricted stock units of transferor assumed upon acquisition and conversion into restricted stock units of the transferee. Restricted Stock Units Assumed and Converted Restricted stock units assumed and converted Employee Service, Share-Based Compensation, Cash Flow Effect, Cash Used to Settle Awards Granted Prior to Business Combination Payments to settle precombination stock awards Aggregate cash paid by the entity during the period to settle equity instruments granted prior to a business combination under share-based payment arrangements. Disclosure, Compensation Related Costs, Retirement Benefits [Text Block] Profit Sharing Plans Disclosure of compensation costs related to retirement benefits including discription of the plan, company contributions and vesting periods. Dividends payable on restricted stock units Adjustments To Additional Paid In Capital Dividends Payable On Restricted Stock This element represents the net change in dividends accrued but not yet paid to holders of outstanding restricted stock units. Amendment Description Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Current portion of long-term debt Long-term Debt, Current Maturities Long-term debt, net of current portion Long-term Debt, Noncurrent Accrued interest Interest Payable, Current Change in restricted cash Increase (Decrease) in Restricted Cash Repayments Of Long Term Debt And Capital Securities Repayment for debt and capital lease obligations