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Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount accrued fees accrued fees accrued registry fees Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Executive Category: Executive Category [Axis] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Award Type [Domain] Award Type [Domain] Diluted income (loss) per share Earnings Per Share, Diluted [Abstract] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Supplemental cash flow disclosures: Supplemental Cash Flow Information [Abstract] Common stock repurchase, share Treasury Stock, Shares, Acquired Depreciation of property and equipment Depreciation, Depletion and Amortization, Nonproduction PEO Name PEO Name Cash, Cash 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Event [Table] Stock-based compensation Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Award Timing Predetermined Award Timing Predetermined [Flag] Labor and Related Expense Labor and Related Expense Deposits Customer Deposits, Current Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Employee Stock Purchase Plan [Member] Employee Stock [Member] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Payments for Repurchase of Common Stock Payments for Repurchase of Common Stock Total current assets Assets, Current Insider Trading Arrangements [Line 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Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Registry fee expenses Registry fee expenses Registry fee expenses Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Senior Notes Senior Notes, Noncurrent Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Reporting Segment Reporting [Text Block] Deposits to acquire Intangible Assets Deposits Assets, Noncurrent Long-term deferred revenues Deferred Revenue, Noncurrent Expiration Date Trading Arrangement Expiration Date Equity Awards Adjustments Equity Awards Adjustments [Member] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Shares used to compute net income per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Location, Statement of Income, Balance [Axis] Income (Loss) from Continuing Operations, Per Diluted Share Net Income Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Basic Share Net Income Income (Loss) from Continuing Operations, Per Basic Share Total liabilities and stockholders' deficit Liabilities and Equity Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other Income and Expenses [Abstract] prepaid registry fees, non current prepaid registry fees, non current prepaid registry fees, non current Common stock, authorized shares Common Stock, Shares Authorized Tabular List, Table Tabular List [Table Text Block] Debt Instrument, Issued Percentage Debt Instrument, Issued Percentage Debt Instrument, Issued Percentage Segment Reporting, Expense Information Used by CODM, Description Segment Reporting, Expense Information Used by CODM, Description Nature Of Total Stock-Based Compensation Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Other Nonoperating Income and Expense Other Nonoperating Income and Expense [Text Block] Accrued employee compensation Accrued Employee Benefits, Current Components Of Accounts Payable And Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Exercise Price Award Exercise Price Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Name Awards Close in Time to MNPI Disclosures, Individual Name Common stock authorized to repurchase Stock Repurchase Program, Authorized Amount Share Repurchase Program, Authorized, Amount Purchases of marketable securities Payments to Acquire Investments Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Preferred stock, authorized shares Preferred Stock, Shares Authorized Common Stock Including Additional Paid in Capital [Member] Common Stock Including Additional Paid in Capital [Member] Operating lease ROU Operating lease ROU Operating lease ROU Debt Disclosure Debt Disclosure [Text Block] Additional share repurchase amount authorized Additional share repurchase amount authorized Additional share repurchase amount authorized Interest Payable Interest Payable Preferred stock-par value $.001 per share Preferred Stock, Value, Issued Scenario [Axis] Scenario [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Class of Stock [Domain] Class of Stock [Domain] Equity Component [Domain] Equity Component [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Accounts payable Accounts Payable, Trade, Current Total costs and expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Treasury Stock Shares Repurchased Treasury Stock Shares Repurchased Treasury Stock Shares Repurchased Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Dividends, Common Stock, Cash Dividends, Common Stock, Cash Total stockholders' deficit Stockholders' Deficit Equity, Attributable to Parent Repayments of Debt, Maturing in More than Three Months Repayments of Debt, Maturing in More than Three Months Name Measure Name Deferred Revenue, Revenue Recognized Deferred Revenue, Revenue Recognized Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other Noncash Income (Expense) Other Noncash Income (Expense) ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Senior Notes, Current Senior Notes, Current Entity Filer Category Entity Filer Category Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance Shares [Member] Performance Shares [Member] Income Tax Expense From Continuing Operations And The Effective Tax Rate Schedule of Effective Income Tax Rate and Expenses [Table Text Block] Schedule of Effective Income Tax Rate and Expenses [Table Text Block] Issued 2017 Notes Issued 2017 Notes [Member] Issued 2017 Notes Revision of Prior Period [Axis] Revision of Prior Period [Axis] Selling, General and Administrative Expense Selling, General and Administrative Expense Other Balance Sheet Items Supplemental Balance Sheet Disclosures [Text Block] Name Trading Arrangement, Individual Name Cash and cash equivalents Included in Cash and cash equivalents Cash and Cash Equivalent Issued 2026 Notes Issued 2026 Notes [Member] Issued 2026 Notes Prepaid Expense, Noncurrent Prepaid Expense, Noncurrent Company Selected Measure Amount Company Selected Measure Amount Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Income Taxes Receivable Income Taxes Receivable Restricted Stock Units [Member] Restricted Stock Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net Income Net income Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Income Statement [Abstract] Income Statement [Abstract] Stockholders' deficit: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Financial Instruments, Owned, at Fair Value, by Type, Alternative [Abstract] Income tax expense Income tax expense from continuing operations Income Tax Expense (Benefit) Deferred Income Tax Assets, Net Deferred Income Tax Assets, Net Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Award Timing Method Award Timing Method [Text Block] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Deferred revenues Deferred Revenue, Current Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Prepaid registry fees, current Prepaid registry fees, current Prepaid registry fees Excise tax on repurchase of common stock Excise tax on repurchase of common stock Excise tax on repurchase of common stock City Area Code City Area Code Net Income Net Income (Loss) Attributable to Parent AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] All Individuals All Individuals [Member] Debt Instrument, Fair Value Disclosure Debt Instrument, Fair Value Disclosure Restatement Determination Date: Restatement Determination Date [Axis] Payments of Dividends Payments of Dividends Payments of Dividends Name Forgone Recovery, Individual Name Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Total long-term assets Assets, Noncurrent Statement [Line Items] Statement [Line Items] Total assets Assets Payments for Repurchase of Common Stock since Inception Payments for Repurchase of Common Stock since Inception Payments for Repurchase of Common Stock since Inception Preferred stock, issued shares Preferred Stock, Shares Issued Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]