Accounts Payable and Accrued Liabilities Disclosure [Text Block] Other Accrued Liabilities Accounts Receivable, Net, Current Accounts receivable, net of allowance of $7,323 and $7,564 as of December 31, 2011 and March 31, 2012, respectively Accounts receivable, net 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) Accounts receivable, allowance 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 Increase (decrease) in accounts payable and accrued and other liabilities Increase (Decrease) in Accounts Receivable Decrease in accounts receivable, net Increase (Decrease) in Prepaid Expense and Other Assets (Increase) decrease 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 Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income Comprehensive income 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) Diluted net income per share (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 Equity in losses of subsidiaries Share-based Compensation Stock-based compensation Stock-based compensation expense Gain (Loss) on Investments Gain on investments, net Gain (loss) on investments, net Gain on investments, net Gain (loss) 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) Other intangible assets, net Net Carrying Value Purchased intangible assets, net 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 Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) Liabilities Total liabilities Marketable Securities, Current Marketable securities Less: classified as current Marketable Securities, Noncurrent Long-term marketable securities Total long-term marketable securities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Income (Loss) Attributable to Parent Net income (loss) Net income (loss) Operating Income (Loss) Income from operations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Increase (Decrease) in Other Operating Assets and Liabilities, Net Other operating activities Other Assets, Current Other current assets Payments for (Proceeds from) Other Investing Activities Other investing activities Proceeds from (Payments for) Other Financing Activities Other financing activities Other 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 Sales and maturities of investments in 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 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 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] Shareholders' Equity Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Other Intangible Assets Assets, Current [Abstract] Current assets: Assets, Current Total current assets Treasury Stock Treasury Stock [Member] Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Diluted weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Basic weighted average common shares outstanding Common Stock Common Stock [Member] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Warrants Warrants [Member] 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, 90,009 and 90,329 shares as of December 31, 2011 and March 31, 2012, respectively Treasury stock, at cost 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) Basic net income per share (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 Increase (decrease) 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 (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Unrealized holding gains (losses) on certain investments, net of tax Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Income Tax Expense (Benefit) Income tax provision Income tax (provision) benefit Income tax benefit (provision) Total 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, 2011 and March 31, 2012 Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Unrealized Gains (Losses) on Investments Accumulated Net Unrealized Investment Gain (Loss) [Member] Deferred Compensation Deferred Compensation, Share-based Payments [Member] Goodwill Goodwill Balance of goodwill at the beginning of the period Balance of goodwill at the end of the period Stock Issued During Period, Value, New Issues Issuance of common stock Stock Issued During Period, Value, Acquisitions Issuance of common stock in connection with acquisition of One Communications Stock Issued During Period, Shares, New Issues Issuance of common stock (in shares) Stock Issued During Period, Shares, Acquisitions Issuance of common stock in connection with acquisition of One Communications (in shares) Treasury Stock, Shares, Acquired Number of shares repurchased Repurchase of common stock (in shares) Total Comprehensive Income Comprehensive Income [Member] 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 Aggregate purchase price Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax benefit from equity awards Shares, Issued Balance (in shares)