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Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Vested and delivered Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Preferred Stock, Shares Issued, Total Preferred Stock, Shares Issued Preferred stock, shares issued Statement of Financial Position Location, Balance [Domain] Balance Sheet Location Increase (Decrease) in Accounts Payable, Total Increase (Decrease) in Accounts Payable Accounts payable Outstanding indebtedness, Carrying value Long-term Debt, Excluding Current Maturities, Total Long-Term Debt, Excluding Current Maturities Long-term debt, net Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Changes in fair value of contingent consideration Plan Name [Axis] Equity [Abstract] Entity Current Reporting Status Entity Current Reporting Status Other Other Major Product And Services [Member] Other major product and services. Operating Expenses [Abstract] Operating expenses: Fair Value, Inputs, Level 2 [Member] Level 2 Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Cash Flow Hedging [Member] Cash Flow Hedging Common Stock, Shares Authorized Common stock, shares authorized Product and Service [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Debt Instrument, Interest Rate, Stated Percentage Interest rate on debt issued Revenue from Contract with Customer [Abstract] Entity Shell Company Entity Shell Company Other Accrued Liabilities, Current Other accrued liabilities Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Total Cash and Cash Equivalent Cash and cash equivalents Common Stock, Shares, Issued, Total Common Stock, Shares, Issued Common stock, shares issued Statement [Table] Statement [Table] Weighted- Average Grant Date Fair Value, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Payments to Acquire Businesses, Gross Cash consideration Statement [Line Items] Statement [Line Items] Business Combination [Domain] Business Acquisition, Acquiree [Domain] Stockholders' equity. 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Increase Decrease In Deferred Income Tax Liability Deferred income taxes Purchase Accounting Adjustments Impacted Cash Purchase accounting adjustments impacted cash. 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Rule 10b5-1 Arrangement Modified Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Fair Value of Stock Options Granted are Estimated Using Black Scholes Option Pricing Model D2C media acquisition. D2C Media Acquisition [Member] D2C Media Acquisition [Member] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Earnings Per Share [Abstract] Net income per share: Statement of Financial Position Location, Balance [Axis] Balance Sheet Location Other assets acquired Business Combination, Recognized Asset Acquired, Other Asset, Current Document Type Document Type Income Taxes Paid, Net Income Taxes Paid, Net, Total Cash (received) paid for income taxes Entity Central Index Key Entity Central Index Key Line of Credit Facility [Table] Line Of Credit Facility [Table] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net decrease in Cash and cash equivalents Subsequent Event Type [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potential common shares excluded from diluted weighted-average shares outstanding Shares repurchased Stock Repurchased and Retired During Period, Shares Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] Summary of PSU Activity Common Stock, Par or Stated Value Per Share Common stock, par value Display Advertising Display Advertising [Member] Display advertising. Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total other comprehensive (loss) income, net of tax Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Outstanding Share Units, Exercisable as of March 31, 2023 Share Units, Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Debt Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative, Notional Amount Notional amount Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Long-Term Debt Instruments [Table] Document Quarterly Report Document Quarterly Report Customer relationships Customer Relationships [Member] Entity Address, State or Province Entity Address, State or Province Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share Units, Outstanding as of December 31, 2025 Share Units, Outstanding as of March 31, 2026 Line of Credit Facility, Remaining Borrowing Capacity Amount available to borrow Outstanding borrowing capacity Business Combination [Table Text Block] Acquisition Purchase Price Allocation Financial Liabilities Fair Value Disclosure Total Total Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Consolidated Interest Coverage Ratio Consolidated interest coverage ratio. 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Schedule Of Contingent Consideration [TextBlock] Schedule Of Contingent Consideration Finite-Lived Intangible Assets, Major Class Name [Domain] Total purchase consideration Business Combination, Consideration Transferred, Total Business Combination, Consideration Transferred Business acquisition, total consideration Acquisition-Date Fair Value Identified intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Asset Acquisition, Consideration Transferred, Contingent Consideration Payment of contingent consideration Payment of contingent consideration Minimum [Member] Minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Granted Financial Instrument [Axis] Assets, Current [Abstract] Current assets: Amortization of Intangible Assets, Total Amortization of Intangible Assets Amortization of intangible assets Fair Value, Inputs, Level 3 [Member] Level 3 Proceeds from Revolving Loan borrowings Proceeds from Long-Term Lines of Credit Borrowings Segment Reporting [Abstract] Total assets acquired Total assets acquired Business Combination, Recognized Asset Acquired, Asset Current liabilities: Liabilities, Current [Abstract] Restructuring and Related Activities Disclosure [Text Block] Reduction in Workforce Stock Repurchased and Retired During Period, Value Aggregate purchase price Balance, Shares Balance, Shares Shares, Outstanding Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Commitments and Contingencies Commitments and contingencies Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Outstanding as of March 31, 2026 Weighted-Average Grant Date Fair Value, Outstanding as of December 31, 2025 Provision for doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Purchase accounting adjustments Goodwill, Measurement Period Adjustment Forecast [Member] Scenario Forecast Non-Rule 10b5-1 Arr Modified [Flag] Non-rule 10b5-1 arrangement modified flag. Non-Rule 10b5-1 Arrangement Modified Liabilities, Noncurrent [Abstract] Noncurrent liabilities: Interest Income (Expense), Net, Total Interest Income (Expense), Operating Interest expense, net Less: Cash acquired Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Cash and cash equivalents Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Other, net Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Basic Basic Basic weighted-average common shares outstanding Scenario [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Aggregate Intrinsic Value, Exercisable Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Income Tax Rate Varied from Statutory Federal Income Tax Rate Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Subsequent Events [Text Block] Subsequent Event APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation Equity, Attributable to Parent Balance Balance Total stockholders' equity Total stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Statement of Stockholders' Equity [Abstract] Type of Restructuring [Domain] Use of Estimates, Policy [Policy Text Block] Use of Estimates Payments of Derivative Issuance Costs Payments related to fair value Equity Method Investment [Table] Entity Address, Address Line Two Entity Address, Address Line Two Repayment in cash Cash Payments of Line of Credit Cash payments of line of credit. Accrues Interest Rate Accrues interest rate. Accrues interest rate Debt Instrument, Name [Domain] Debt Instrument, Name Other current assets Other Assets, Current Derivative Instruments and Hedging Activities Disclosure [Abstract] Maturity Period Maturity of Convertible Note Maturity of convertible note. Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Other Officer [Member] Other Officer [Member] Other officer. Plan Name [Domain] Reclassified from accumulated other comprehensive (loss) into income tax expense (benefit) Reclassified From Accumulated Other Comprehensive Loss Into Income Tax Expense Benefit Reclassified from accumulated other comprehensive income (loss) into income tax expense (benefit) Reclassified from accumulated other comprehensive (loss) into income tax (benefit) expense Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Aggregate Purchase Price Aggregate purchase price. Aggregate purchase price 6.375% senior unsecured notes due 2028. Six Point Three Seven Five Percent Senior Unsecured Notes Due Two Thousand Twenty Eight [Member] 6.375% Senior Unsecured Notes Due 2028 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Delivered But Not Yet Vested. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Delivered But Not Yet Vested RSUs vested but not yet delivered Credit Facility [Axis] Credit Facility Condensed Financial Statements [Table Text Block] Schedule of Consolidated Financial Statements Fifth Amendment to the Credit Agreement Fifth Amendment to the Credit Agreement [Member] Fifth amendment to the credit agreement. Sales channel through other. 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Interest Paid, Excluding Capitalized Interest, Operating Activity Cash paid for interest Statistical Measurement [Domain] Statistical Measurement Total current assets Assets, Current Document Period End Date Document Period End Date Other Income and Expenses [Abstract] Equity Method Investments and Joint Ventures [Abstract] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Share Units, Exercisable as of March 31, 2025 Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Amortization Period (in years) Statement of Financial Position [Abstract] Restricted Stock Units (RSUs) [Member] RSUs Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive (loss) income, net of tax: Class of Stock [Axis] Share Repurchase Program, Period in Force Share repurchase program, duration Liabilities Total liabilities Total liabilities Financial Instruments [Domain] Weighted Average Number of Shares Outstanding, Diluted Diluted Diluted weighted-average common shares outstanding Securities Act File Number Entity File Number Cover [Abstract] Measurement Input Type [Axis] Schedule of Approximate Fair Value and Related Carrying Value of the Company's Outstanding Indebtedness Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Share Units, Forfeited Share Units, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Sales channel through OEM and National. Sales Channel Through OEM and National [Member] OEM and National Senior secured leverages ratio Senior Secured Leverages Ratio Senior secured leverages ratio. Scenario [Domain] Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Unrealized loss (gain) on foreign currency denominated transactions Number of Operating Segments Number of operating segment Sale of Stock [Domain] Segment Information Segment Reporting Disclosure [Text Block] General and Administrative Expense, Total General and administrative General and Administrative Expense Schedule of Share Repurchase Program [Table Text Block] Schedule of share repurchase program. Schedule of Share Repurchase Program Subsequent Event [Table] Preferred Stock Value Excluding Treasury Stock, Total Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Preferred Stock Value Excluding Treasury Stock Preferred Stock at par, $0.01 par value; 5,000 shares authorized; no shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively Pay Per Lead Pay Per Lead [Member] Pay per lead. 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Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes Shares issued in connection with stock-based compensation plans, net Net Secured Debt Net secured debt. Net secured debt Restructuring Cost and Reserve [Line Items] Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Repayments of Long-Term Lines of Credit Payments of Revolving Loan borrowings Net identifiable assets Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Net identifiable assets Long-Term Line of Credit Long-Term Line of Credit, total Term loan outstanding amount Payment for Contingent Consideration Liability, Financing Activities Payments of contingent consideration Share based compensation arrangement by share based payment award equity instruments other than options vested but not yet delivered. 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Stock Issued During Period Shares Share Based Compensation Net Of Shares Withheld For Taxes Shares issued in connection with stock-based compensation plans, net, Shares Share based compensation arrangement by share based payment award performance period. Share Based Compensation Arrangement By Share Based Payment Award Performance Period Share units performance period Business Combination [Axis] Business Acquisition [Axis] Derivative, Fair Value, Net, Total Derivative, Fair Value, Net Unrealized loss of fair value Volatility Measurement Input, Option Volatility [Member] Cost of revenue and operations. Cost Of Revenue And Operations Cost of revenue and operations Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Statement of Comprehensive Income [Abstract] Additions related to accu -trade acquisition on contingent consideration. Additions Related To Accu -Trade Acquisition On Contingent Consideration Addition Related to Accu-Trade Acquisition Equity Method Investment, Nonconsolidated Investee [Axis] Maximum [Member] Maximum Total net leverage ratio Total Net Leverage Ratio Total net leverage ratio. Designated as Hedging Instrument [Member] Designated as Hedging Instrument Statistical Measurement [Axis] Statistical Measurement Weighted Average Grant Date Fair Value, Exercised Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price One-time Termination Benefits [Member] One-time Termination Benefits [Member] Prepaid Expense, Current, Total Prepaid Expense, Current Prepaid expenses Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common Stock at par, $0.01 par value; 300,000 shares authorized; 53,926 and 58,636 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively Fixed rate of interest Derivative, Fixed Interest Rate Consolidation, Policy [Policy Text Block] Principles of Consolidation Amortization of Debt Issuance Costs Amortization of debt issuance costs Debt instrument, covenant description Debt Instrument, Covenant Description RepairPal Equity Investment Equity Securities Investment Disclosure [Text Block] The entire disclosure for equity securities investment. Preferred Stock, Shares Authorized Preferred stock, shares authorized Finite-Lived Intangible Assets by Major Class [Axis] Employee Stock [Member] Employee Stock Purchase Plan Revenue from Contract with Customer [Text Block] Revenue Business Combination [Table] Entity Registrant Name Entity Registrant Name Debt Disclosure [Text Block] Debt Payments for stock-based compensation plans, net. Payments for Stock-Based Compensation Plans, Net Payments for stock-based compensation plans, net Payments for stock-based compensation plans, net Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Other (expense) income, net Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total Additional Paid in Capital Additional paid-in capital Subsequent Events [Abstract] Income tax expense (benefit) Income tax expense (benefit) Income tax benefit Income tax expense Measurement Frequency [Axis] Other Accrued Liabilities Current [Member] Other accrued liabilities current. Other Accrued Liabilities Current [Member] Stock Repurchased During Period, Value Shares repurchased Aggregate purchase price Repurchases of common stock (value) Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Other Income and Other Expense Disclosure [Text Block] Other Income (Expense), net Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share Units, Granted Assets Total assets Restructuring Cost [Table] Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Exercisable Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Share Units, Vested and delivered Business Combination [Abstract] Business Combinations [Abstract] Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Diluted Net income per share, diluted City Area Code City Area Code Other Comprehensive Income (Loss), Net of Tax, Total Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Accu-Trade Acquisition. Accu-Trade Acquisition [Member] Accu-Trade Acquisition [Member] Revolving loan principal amounts Debt Instrument, Face Amount Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Business Combination [Line Items] Business Acquisition [Line Items] DealerClub Acquisition [Member] DealerClub Acquisition [Member] DealerClub acquisition. Acquired software Computer Software, Intangible Asset [Member] Potentional contingent consideration to be paid in stock Business Combination, Consideration Transferred, Equity Interest Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property, Plant and Equipment, Net Property and equipment, net Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Operating Income (Loss) Operating income Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Percentage of ownership by the company Retained Earnings [Member] Accumulated Deficit Share-based Payment Arrangement, Noncash Expense, Total Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Omnibus incentive compensation plan. Omnibus Incentive Compensation Plan [Member] Omnibus Plan Liabilities, Noncurrent Total noncurrent liabilities Total noncurrent liabilities Fair Value, Inputs, Level 1 [Member] Level 1 Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Developed technology costs Developed Technology Rights [Member] Deferred Income Tax Liabilities, Net, Total Deferred Income Tax Liabilities, Net Deferred tax liabilities, net Nonoperating expenses: Nonoperating Income (Expense) [Abstract] Derivative Contract [Domain] Derivative Contract Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel Entity Interactive Data Current Entity Interactive Data Current Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Dealer member. Dealer [Member] Dealer Increase (Decrease) in Other Noncurrent Liabilities Other liabilities Stock Purchased Average Price Per Share Stock Purchased Average Price Per Share Average purchase price per share Entity Tax Identification Number Entity Tax Identification Number Revenues [Abstract] Revenue: Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Effect of exchange rate changes on Cash and cash equivalents Local Phone Number Local Phone Number Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding: Restructuring Costs Restructuring Costs, Total Restructuring charges Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award options exercisable weighted average grant date fair value. Weighted- Average Grant Date Fair Value, Exercisable as of March 31, 2025 Accounting Policies [Abstract] Other Accrued Liabilities Other Current Liabilities [Member] Disaggregation of Revenue [Line Items] Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenue from Contract with Customer, Excluding Assessed Tax Total revenue Class of Stock [Domain] Stock, Class of Stock [Table] Entity Emerging Growth Company Entity Emerging Growth Company Total purchase consideration Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Total purchase consideration