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No documentation exists for this element. -- Accrued expenses and other current liabilities Accrued Liabilities, Current [Abstract] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] INCOME TAXES Income Tax Disclosure [Text Block] ORGANIZATION Business Description and Basis of Presentation [Text Block] Expected dividend Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock $0.01 par value; 5,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Diluted (in dollars per share) Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Treasury stock; 3,355,466 and 3,355,466 shares, respectively Treasury Stock, Value Accounts receivable (net of allowance of 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Expense, Debt Gross carrying amount Convertible Debt Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Product development Research and Development Expense [Member] Equity Investment Equity Securities without Readily Determinable Fair Value [Policy Text Block] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Accrued Balance at beginning of period Accrued Balance at end of period Restructuring Reserve Award Type [Axis] Award Type [Axis] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Document Quarterly Report Document Quarterly Report 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Operation, Accounts, Notes and Loans Receivable, Net Insurance Insurance Insurance Segment [Member] Insurance Segment [Member] Reconciliation of Income Tax (Expense) Benefit Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Non-cash compensation due to accelerated vesting of equity awards Non-Cash Restructuring Reserve, Settled without Cash Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Accrued advertising expense Accrued Advertising, Current Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Current lease liabilities Operating Lease, Liability, Current Income taxes receivable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Amortization of intangibles Amortization of intangibles Amortization of Intangible Assets Entity Shell Company Entity Shell Company Intangible assets with definite lives, net Total intangible assets with definite lives, net Finite-Lived Intangible Assets, Net Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date Accumulated amortization Disposal Group, Including Discontinued Operation, Finite-Lived Intangible Assets, Accumulated Amortization Disposal Group, Including Discontinued Operation, Finite-Lived Intangible Assets, Accumulated Amortization Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period Total cash, cash equivalents, restricted cash and restricted cash 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[Member] CASH AND RESTRICTED CASH Restricted Assets Disclosure [Text Block] Market options Performance Options [Member] Performance Options Total costs and expenses Costs and Expenses Debt repurchase amount Debt Instrument, Repurchased Face Amount Comprehensive (loss) income Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Rollforward of Accrued Balance for Restructuring Activities Restructuring and Related Costs [Table Text Block] Document Type Document Type Tabular List, Table Tabular List [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Entity Address, Address Line Two Entity Address, Address Line Two Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Payments related to net-share settlement of stock-based compensation, net of proceeds from exercise of stock options Proceeds (Payments) Related To Net-Share Settlement Of Stock-Based Compensation, Net Proceeds (Payments) Related To Net-Share Settlement Of Stock-Based Compensation, Net STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Stock options, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Allowance for credit loss Balance, beginning of the period Balance, end of the period Accounts Receivable, Allowance for Credit Loss, Current Income Statement and Statement of Comprehensive Income [Abstract] Income Statement and Statement of Comprehensive Income Trademarks and tradenames Trademarks and Trade Names [Member] Restructuring and severance Restructuring Charges [Member] Other Other Liabilities, Current Schedule of Intangible Assets with Definite Lives Schedule of Finite-Lived Intangible Assets [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Costs and expenses: Costs and Expenses [Abstract] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Four Finite-Lived Intangible Asset, Expected Amortization, after Year Four Title of 12(b) Security Title of 12(b) Security Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Goodwill Goodwill, Gross Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Intangible assets with indefinite lives Indefinite-Lived Intangible Assets (Excluding Goodwill) Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Nonvested at the beginning of the period (in dollars per share) Nonvested at the end of the period (in dollars per share) Share-Based 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Price Trigger Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Segment marketing expense Marketing Expense Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Stock options, Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Debt Instrument [Axis] Debt Instrument [Axis] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Effective tax rate Effective Income Tax Rate Reconciliation, Percent Accrued restructuring and severance Accrued Restructuring And Severance, Current Accrued Restructuring And Severance, Current Other non-current assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Credit Facility [Axis] Credit Facility [Axis] Total liabilities Liabilities Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, 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[Table] Schedule of Finite-Lived Intangible Assets [Table] Goodwill impairment Goodwill, Impairment Loss Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenue recognized from prior period Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 2022 action 2022 Reduction Action [Member] 2022 Reduction Action Property and equipment impairment charges Tangible Asset Impairment Charges RESTRUCTURING ACTIVITIES Restructuring and Related Activities Disclosure [Text Block] Preferred stock, shares issued 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of Operating Revenue Common Stock Common Stock [Member] Individual: Individual [Axis] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Product and Service [Axis] Product and Service [Axis] SHAREHOLDERS' EQUITY Earnings Per Share [Text Block] Number of employee positions estimated to be eliminated in workforce reduction Restructuring and Related Cost, Expected Number of Positions Eliminated Income Statement Location [Domain] Income Statement Location [Domain] Repayment of term loan Repayments of Secured Debt Document Fiscal Year Focus Document Fiscal Year Focus Nonvested RSUs and Restricted Stock Units,, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Property and equipment (net of accumulated depreciation of $35,865 and $33,851, respectively) Property, Plant and Equipment, Net Summary of Changes in Outstanding Stock Options Share-Based Payment Arrangement, Option, Activity [Table Text Block] Exercise Price Award Exercise Price Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Offering period (in months) Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Disposal Group Classification [Axis] Disposal Group Classification [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] ASSETS: Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] LIABILITIES: Liabilities [Abstract] Accrued expenses and other current liabilities Disposal Group, Including Discontinued Operation, Accrued Liabilities And Other Liabilities, Current Disposal Group, Including Discontinued Operation, Accrued Liabilities And Other Liabilities, Current Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Tax impacts due to ASU 2020-06 adoption Stockholders' Equity Attributable to Parent, Tax Stockholders' Equity Attributable to Parent, Tax Accumulated Deficit Retained Earnings [Member] Current portion of long-term debt Long-Term Debt, Current Maturities Schedule of Non-cash Compensation Related to Equity Awards Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Total liabilities and shareholders' equity Liabilities and Equity Other non-current assets Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value 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No documentation exists for this element. -- Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Interest (expense) income, net Interest Income (Expense), Net Shares issued under ESPP (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Credit Facility [Domain] Credit Facility [Domain] Purchase of treasury stock (in shares) Repurchased shares of common stock under stock repurchase program (in shares) Treasury Stock, Shares, Acquired Contribution to LendingTree Foundation Charitable Contribution Accrual Charitable Contribution Accrual Liabilities held for sale (Note 7) Total liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt Net carrying amount Long-Term Debt, Excluding Current Maturities Selling and marketing expense Selling and Marketing Expense [Member] Diluted (in shares) Weighted average diluted common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Prepaid and other current assets Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Premium of warrant strike price over sales price of common stock Premium of warrant strike price over sales price of common stock Premium of warrant strike price over sales price of common stock Assets and Liabilities Classified As Held For Sale Disposal Groups, Including Discontinued Operations [Table Text Block] REVENUE Revenue from Contract with Customer [Text Block] Company Selected Measure Amount Company Selected Measure Amount Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated depreciation Disposal Group, Including Discontinued Operation, Property, Plant And Equipment, Accumulated Depreciation Disposal Group, Including Discontinued Operation, Property, Plant And Equipment, Accumulated Depreciation Additional Paid-in Capital Additional Paid-in Capital [Member] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Cover [Abstract] Cover [Abstract] Interest adjustment due to ASU 2020-06 adoption Stockholders' Equity Attributable to Parent, Before Tax Stockholders' Equity Attributable to Parent, Before Tax Non-cash compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Amortization of debt issuance costs Amortization of Debt Issuance Costs Restructuring and Related Activities [Abstract] Other non-current liabilities Other Liabilities, Noncurrent Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Net (decrease) increase in cash, cash equivalents, restricted cash and restricted cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Common stock repurchases Disclosure of Repurchase Agreements [Abstract] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Purchase price of common stock, percent Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Reduction in carrying amount of ROU asset, offset by change in operating lease liabilities ROU asset amortization, offset by change in operating lease liabilities ROU asset amortization, offset by change in operating lease liabilities Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Scenario [Axis] Scenario [Axis] Debt Instrument [Line Items] Debt Instrument [Line Items] Contract asset Contract with Customer, Asset, after Allowance for Credit Loss Basic (in shares) Weighted average basic common shares (in shares) Weighted Average Number of Shares Outstanding, Basic Income tax benefit - excluding excess tax expense on stock compensation Income Tax Benefit (Expense) Excluding Excess Tax (Expense) Benefit On Stock Compensation Income Tax Benefit (Expense) Excluding Excess Tax (Expense) Benefit On Stock Compensation Entity Current Reporting Status Entity Current Reporting Status Operating income (loss) Operating Income (Loss) Schedule of Income Tax (Expense) Benefit and Effective Tax Rate Schedule of income tax provision benefit [Table Text Block] [Table Text Block] for Schedule of income tax provision benefit [Table] Q1 2023 action 2023 Reduction Action ("Reduction Plan") [Member] 2023 Reduction Action ("Reduction Plan") Cost of revenue (exclusive of depreciation and amortization shown separately below) Cost of Revenue Amortization of intangible assets with definite lives computed on a straight-line basis Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] LIBOR London Interbank Offered Rate (LIBOR) 1 [Member] London Interbank Offered Rate (LIBOR) 1 Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Scenario [Domain] Scenario [Domain] Excess tax expense on stock compensation Excess tax expense on stock compensation Excess Tax Expense (Benefit) on Stock Compensation, Income Tax Expense (Benefit) Excess Tax Expense (Benefit) on Stock Compensation, Income Tax Expense (Benefit) Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Line of credit outstanding Long-Term Line of Credit Type of Restructuring [Domain] Type of Restructuring [Domain] Accounting Standards Update 2020-06 [Member]