Document and Entity Information [Abstract] Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Consolidated Balance Sheets [Abstract] 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, Amortized Cost Basis Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Accounts Receivable, Net, Current Accounts Receivable, Net, Current, Total Accounts receivable, net of allowance for doubtful accounts of $1,129 at December 31, 2011 and $1,493 at December 31, 2010 Prepaid Expense and Other Assets, Current Prepaid Expense and Other Assets, Current, Total Prepaid expenses and other current assets Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Deferred tax assets Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property and equipment, net Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Intangible Assets, Net (Excluding Goodwill) Net Intangible assets, Total Intangible assets, net Deferred Tax Assets, Net, Noncurrent Non-current deferred tax assets, net Deferred tax assets Other Assets, Noncurrent Other Assets, Noncurrent, Total Other assets Assets TOTAL ASSETS Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accrued Liabilities, Current Accrued expenses Accrued expenses Deferred Revenue, Current Deferred Revenue, Current, Total Deferred revenue Liabilities of Disposal Group, Including Discontinued Operation, Current Liabilities of discontinued operations related to Company's tax indemnification Liabilities of Disposal Group, Including Discontinued Operation, Current, Total Liabilities of discontinued operations Liabilities, Current Total current liabilities Convertible Notes Payable, Noncurrent Notes, Carrying Amount Convertible notes due Other Liabilities, Noncurrent Other Liabilities, Noncurrent, Total Other long-term liabilities Commitments and contingencies Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred stock, 50,000,000 shares authorized; no shares issued and outstanding Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock, $0.01 par value per share, 650,000,000 shares authorized; 62,410,255 shares issued at December 31, 2011 and 62,401,272 shares issued at December 31, 2010 Additional Paid in Capital, Common Stock Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid-in capital Treasury Stock, Value Treasury stock, at cost; 6,685,439 shares at December 31, 2011 and 2,485,391 shares at December 31, 2010 Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated deficit Stockholders' Equity Attributable to Parent Ending Balance Beginning Balance Stockholders' equity Liabilities and Equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Allowance for Doubtful Accounts Receivable, Current Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Accounts receivable, net of allowance for doubtful accounts Preferred stock, shares authorized Preferred stock, shares authorized Preferred stock, shares issued Preferred Stock, Shares Issued, Total Preferred stock, shares issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Repurchase of Common stock, par value Common stock, shares authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Treasury stock, shares Treasury Stock Shares, Ending Balance Treasury Stock Shares , Beginning Balance Treasury stock, shares Consolidated Statements of Operations [Abstract] Sales Revenue, Services, Net Revenues Sales Revenue, Services, Net, Total Revenue Cost of Services Cost of Services, Total Cost of operations Selling and Marketing Expense Selling and Marketing Expense, Total Sales and marketing General and Administrative Expense General and Administrative Expense, Total General and administrative Depreciation, Depletion and Amortization, Nonproduction Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation and amortization Investment Income, Interest Interest income Interest income Interest Expense Interest Expense, Total Interest expense Gains (Losses) on Extinguishment of Debt Loss (gain) on convertible notes Loss on convertible notes Pre-tax gain (loss) on repurchase of notes Gains (Losses) on Extinguishment of Debt, Total Loss on convertible notes Gain (loss) on investments (Gain) loss on investments (Loss) gain on investments Gain (loss) on investments Gain (Loss) on Investments, Total Loss on investments Restructuring settlement, impairment provisions and other expense. Restructuring Settlement, Impairment Provisions and Other Expense Transaction and other expense (income) Transaction, severance and other expense Transaction, severance and other expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income from continuing operations before income tax provision (benefit) (Loss) income from continuing operations before income tax (benefit) provision Income Tax Expense (Benefit) Income tax (benefit) provision Total income tax provision (benefit) Income tax provision (benefit) Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Consolidated income from continuing operations (Loss) income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Consolidated income from discontinued operations, net of tax Income from discontinued operations by its reduction indemnification liability Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total Consolidated income from discontinued operations, net of a tax provision (benefit) of $4,812, ($444) and $21,224 in 2011, 2010 and 2009 Net Income (Loss) Attributable to Parent Net income Consolidated net income inclusive of noncontrolling interest Consolidated net income inclusive of noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest, Total Income attributable to noncontrolling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net (loss) income Net income attributable to Company stockholders Consolidated net income inclusive of noncontrolling interest Income (Loss) from Operations before Extraordinary Items [Abstract] Amounts attributable to Company stockholders: Income (Loss) from Continuing Operations Attributable to Parent (Loss) income from continuing operations Income (Loss) from Continuing Operations Attributable to Parent, Total Income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent (Loss) income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total Income from discontinued operations Earnings Per Share, Basic [Abstract] Basic (loss) income per common share: Basic income per common share: Income (Loss) from Continuing Operations, Per Basic Share (Loss) income from continuing operations Income (Loss) from Continuing Operations, Per Outstanding Share, Total Income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share (Loss) income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Share, Total Income from discontinued operations Earnings Per Share, Basic Net income attributable to Company stockholders Net income attributable to Company stockholders Net (loss) income attributable to Company stockholders Earnings Per Share, Diluted [Abstract] Diluted (loss) income per common share: Diluted income per common share: Income (Loss) from Continuing Operations, Per Diluted Share (Loss) income from continuing operations Income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share (Loss) income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share, Total Income from discontinued operations Earnings Per Share, Diluted Net income attributable to Company stockholders Net income attributable to Company stockholders Net (loss) income attributable to Company stockholders Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average shares outstanding used in computing per share amounts: Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted-average shares - Basic Weighted Average Number of Shares Outstanding, Diluted Adjusted weighted-average shares after assumed conversions - Diluted Adjusted weighted-average shares after assumed conversions - Diluted Diluted Discontinued Operation, Tax Effect of Discontinued Operation Discontinued Operation, Tax Effect of Discontinued Operation, Total Income from discontinued operations, tax provision (benefit) Consolidated Statements of Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-In Capital Treasury Stock [Member] Treasury Stock Retained Earnings [Member] Accumulated Deficit Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive (Loss) Income Parent [Member] Total Stockholders' Equity Noncontrolling Interest [Member] Non-Controlling Interest Shares, Issued Ending Balance, Shares Beginning Balance, Shares Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income: New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Cumulative effect related to the adoption of new authoritative guidance relating to other-than-temporary impairments Cumulative effect of initial adoption of SFAS 159 Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Net change in unrealized losses on securities Unrealized holding gains Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income Other comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Stock Issued During Period, Value, New Issues Issuance of stock for option exercises and other issuances Stock Issued During Period, Shares, New Issues Issuance of stock for option exercises and other issuances, Shares Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax benefit realized from issuances of common stock Stockholders' Equity, Change in Reporting Entity Recognition of Merger Recognition of Merger Stockholders' Equity, Other Shares Recognition of Merger, Shares Repurchase Convertible Notes Net Of Tax Repurchases of 31/8% convertible notes, net of tax Repurchases of 31/8% convertible notes, net of tax Repurchases of 3 1/8% convertible notes, net of tax Repurchases And Redemption Convertible Notes Net Of Tax Conversions, repurchases and redemption of 1.75% and 31/8% convertible notes, net of tax Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments, Total Conversions, repurchases and redemption of 1.75% and 31/8% convertible notes, net of tax Stock Issued During Period, Shares, Conversion of Convertible Securities Convertible notes, shares Conversions, repurchases and redemption of 1.75% and 31/8% convertible notes, net of tax, Shares Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Total Stock-based compensation expense Treasury Stock, Retired, Cost Method, Amount Purchase of treasury stock under repurchase program Purchase of treasury stock under repurchase program Stock repurchased during period repurchase program, shares. Stock Repurchased During Period Repurchase Program, Shares Purchase of treasury stock under repurchase program, Shares Treasury Stock, Value, Acquired, Cost Method Purchase of treasury stock in tender offer Purchase of treasury stock in tender offer Stock repurchased program value reflected as treasury stock recorded using the cost method Stock repurchased during period tender offers, shares. Stock Repurchased During Period Tender Offers, Shares Purchase of treasury stock in tender offer, Shares Stock Repurchased During Period, Value Purchase of treasury stock, Value Purchase of treasury stock, Value Stock Repurchased During Period, Shares Purchase of treasury stock under repurchase program, Shares Purchase of treasury stock Reversal of EBSCOs Comprehensive Loss In Connection With Sale Of EBSCO Other Other Reversal of EBSCO's comprehensive loss in connection with sale of EBSCO Debt Instrument, Interest Rate, Stated Percentage Accrued interest rate on senior secured notes Interest on convertible notes 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 consolidated net income inclusive of noncontrolling interest to net cash provided by operating activities: Non-cash interest, net. Noncash Interest Net Non-cash interest, net Non cash advertising expense Non cash advertising expense Non cash advertising Share-based Compensation Consolidated income from continuing operations Share-based Compensation, Total Non-cash stock-based compensation Deferred Income Tax Expense (Benefit) Approximate deferred income tax benefit primarily related to the reversal of income tax valuation allowance attributable to its ARS Deferred income tax provision (benefit) Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other, net Increase (Decrease) in Prepaid Expense and Other Assets, Total Prepaid expenses and other, net Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other long-term liabilities Increase (Decrease) in Deferred Revenue Deferred revenue Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by continuing operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash (used in) provided by discontinued operations Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Proceeds from Sale of Available-for-sale Securities Proceeds from Sale of Available-for-sale Securities, Total Proceeds from sales of available-for-sale securities Proceeds received from ARS option. Proceeds Received from ARS Option Proceeds received from ARS option Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Payments for (Proceeds from) Businesses and Interest in Affiliates Proceeds received (payments made) from sale of discontinued operations Payments for (Proceeds from) Businesses and Interest in Affiliates, Total Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by continuing operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash used in discontinued operations Net Cash Provided by (Used in) Investing Activities Net cash provided by investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Stock Options Exercised Proceeds from exercise of stock options Cash used for withholding taxes due on stock-based awards Cash Used for Withholding Taxes Due on Stock Based Awards Cash used for withholding taxes due on stock-based awards Proceeds from Convertible Debt Net proceeds from issuance of 2.50% convertible notes and 2.25% convertible notes Proceed From sale of Notes Repurchases of convertible notes. Repurchases of Convertible Notes Repurchases of 1.75% convertible notes and 3 1/8% convertible notes Payments for Repurchase of Common Stock Purchase of treasury stock Cash used to purchase of shares Payments of Merger Related Costs, Financing Activities Cash paid for merger related costs Cash paid for merger related costs Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit on stock-based awards 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 on Cash and Cash Equivalents, Total Effect of exchange rates on cash Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Background and Basis of Presentation and Summary of Significant Accounting Policies [Abstract] Business Description and Basis of Presentation [Text Block] Background and Basis of Presentation Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Discontinued Operations [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Convertible Notes [Abstract] Long-term Debt [Text Block] Convertible Notes Long-Lived Assets. Long-Lived Assets [Abstract] Long lived assets disclosure. Long Lived Assets Disclosure [Text Block] Long-Lived Assets Payables and Accruals [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses 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 Retirement Plans [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Retirement Plans Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Equity Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Fair Value of Financial Instruments and Non-Recourse Credit Facilities [Abstract] Fair Value Disclosures [Text Block] Fair Value of Financial Instruments and Non-Recourse Credit Facilities Transaction, severance and other expense. Transaction, Severance and Other Expense [Abstract] Transaction, severance and other expense. Transaction, severance and other expense [Text Block] Transaction, severance and other expense Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Supplemental Disclosures of Cash Flow Information [Abstract] Cash Flow, Supplemental Disclosures [Text Block] Supplemental Disclosures of Cash Flow Information Quarterly Financial Data [Abstract] Quarterly Financial Information [Text Block] Quarterly Financial Data Subsequent Event [Abstract] Subsequent Events [Text Block] Subsequent Event Valuation and Qualifying Accounts [Abstract] Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Valuation and Qualifying Accounts Consolidation, Policy [Policy Text Block] Principles of Consolidation Use of Estimates, Policy [Policy Text Block] Accounting Estimates Comparability of interim financial data due to seasonality. Comparability of Interim Financial Data Due to Seasonality [Policy Text Block] Seasonality