Settlement payment Loss Contingency Accrual, Payments Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Name of Major Customer [Domain] Customer [Domain] CONTINGENCIES Legal Matters and Contingencies [Text Block] Letter of Credit Letter of Credit [Member] Impact of the Coronavirus Aid, Relief, and Economic Security Act Effective Income Tax Rate Reconciliation, CARES Act, Amount Effective Income Tax Rate Reconciliation, CARES Act, Amount State Current State and Local Tax Expense (Benefit) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Leasehold improvements Leasehold Improvements [Member] Preferred stock, outstanding shares Preferred Stock, Shares Outstanding Acquisition related costs Business Combination, Acquisition Related Costs Security Exchange Name Security Exchange Name Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Contingent consideration payments Contingent consideration payment, financing Payment for Contingent Consideration Liability, Financing Activities Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Nondeductible meals & entertainment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Investment, Name [Axis] Investment, Name [Axis] Number of shares available for issuance under the ESPP Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Schedule of changes in fair value of Level 3 liabilities Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Net increase (decrease) 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 Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Expected volatility rate (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Weighted Average Remaining Contractual Term Share Based Compensation Arrangement by Share Based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] -- None. No documentation exists for this element. -- Rental income Operating Lease, Lease Income Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Unused borrowing capacity fee Debt Instrument, Unused Borrowing Capacity, Fee Amortization of intangibles Amortization of intangibles Amortization of Intangible Assets Weighted Average Amortization Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Additions (subtractions) based on tax positions of the prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Net deferred taxes Deferred Tax Assets, Net Anti-dilutive securities excluded from calculation of diluted earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Revenue recognized from prior period Contract with Customer, Liability, Revenue Recognized Product development Research and Development Expense [Member] Subsequent Events [Abstract] Maximum contribution by employees as a percentage of pre-tax earnings Defined Contribution Plan Employee Contribution Limit Percentage of Compensation The limit of annual employee contributions to the plan per calendar year as a percentage of compensation. Deferred income tax assets Deferred Tax Assets, Net of Valuation Allowance Business Combination and Asset Acquisition [Abstract] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Award Type [Domain] Award Type [Domain] Amortization of intangible assets with definite lives computed on a straight-line basis Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Local Phone Number Local Phone Number Options exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Goodwill and Indefinite-Lived Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Preferred stock $.01 par value; 5,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Fair Value Finite-lived Intangible Assets Acquired 2020 Warrants 2020 Warrants [Member] 2020 Warrants [Member] Threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Accumulated Deficit Retained Earnings [Member] Other Consumer Other Consumer [Member] Other Consumer [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Repurchased face amount Debt Instrument, Repurchased Face Amount Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Performance awards earned (in shares) Performance Awards Earned Performance Awards Earned Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Basic (in dollars per share) Earnings Per Share, Basic REVENUE Revenue from Contract with Customer [Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Leasing Deferred Tax Assets, Operating Lease Deferred Tax Assets, Operating Lease Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Nonvested at the beginning of the period (in shares) Nonvested at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Lending Tree Loans Lending Tree Loans [Member] Represents the information pertaining to LendingTree Loans. Debt issuance costs, liability component Debt issuance costs Debt issuance costs, liability component Debt issuance costs, liability component Percent of non-voting equity Line of Credit Facility, Collateral, Percent of Non-Voting Equity Line of Credit Facility, Collateral, Percent of Non-Voting Equity Interest expense Interest Expense, Debt Return performance, percent of target stock price Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Target Number Of Shares Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Target Number Of Shares Schedule of funding commitments that could potentially require performance in the event of demands by third parties or contingent events Commitments Related to Performance on Demand [Table Text Block] Tabular disclosure of commitments that could potentially require performance in the event of demands by third parties or contingent events. Cumulative effect adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Discount rate (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount Rate Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Credit cards Credit Cards [Member] Credit Cards [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Conversion option two Debt Instrument, Redemption, Period Two [Member] Entity Voluntary Filers Entity Voluntary Filers Fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Plan Name [Axis] Plan Name [Axis] Impairment losses during period related to goodwill Goodwill, Impairment Loss Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] State income taxes, net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Entity Small Business Entity Small Business Number of shares covered by the hedge transactions Number of Shares Covered by the Hedge Transactions Number of Shares Covered by the Hedge Transactions ABR Base Rate [Member] Schedule of reconciliation of the allowance for doubtful accounts Financing Receivable, Allowance for Credit Loss [Table Text Block] Additions based on tax positions of the current period Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Intangible assets with definite lives Finite-Lived Intangible Assets [Line Items] Pending Litigation Pending Litigation [Member] COMMITMENTS Commitments Disclosure [Text Block] Scenario [Axis] Scenario [Axis] Impairment charges related to trade names and trademarks Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Total deferred tax assets, net of the valuation allowance Gross Deferred Tax Assets, Net of Valuation Allowance Amount AFTER allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments Entity Interactive Data Current Entity Interactive Data Current 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Change in fair value of contingent consideration Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Balance Sheet Location [Domain] Balance Sheet Location [Domain] Balance, beginning of the period Balance, end of the period Unrecognized Tax Benefits Total gross deferred tax assets Deferred Tax Assets, Gross Income Tax Authority [Domain] Income Tax Authority [Domain] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Address, State or Province Entity Address, State or Province Damages sought Loss Contingency, Damages Sought, Value Performance Options Performance Options [Member] Performance Options Additional disclosure Earnings Per Share, Diluted, Other Disclosures [Abstract] Deferred income tax assets Deferred Income Tax Assets, Net Operating loss carryforwards, valuation allowance Operating Loss Carryforwards, Valuation Allowance General and administrative expense General and administrative expense General and Administrative Expense Options exercisable at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Income tax refunds Proceeds from Income Tax Refunds Accounting Policies [Abstract] Accounting Policies [Abstract] Outstanding at the end of the period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Total net Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, after Accumulated Amortization Net noncurrent assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Federal Current Federal Tax Expense (Benefit) Operating lease, liability Present value of lease liabilities Operating Lease, Liability 3-5 years Commitment Expiration Related to Performance and Completion of Contract Due within Three and Fifth Year Represents the amount of commitment expiration within the three and fifth year after the balance sheet date related to performance and completion of contracts. Document Transition Report Document Transition Report Net income (loss) from continuing operations Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income Statement and Statement of Comprehensive Income [Abstract] Income Statement and Statement of Comprehensive Income Weighted-average period for recognition of unrecognized compensation cost (in years) Weighted-average period for recognition of unrecognized compensation cost (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Nonvested at the beginning of the period (in dollars per share) Nonvested at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Customer concentration Customer Concentration Risk [Member] ResCap ResCap [Member] ResCap [Member] LEASES Lessee, Operating Leases [Text Block] BUSINESS ACQUISITIONS Business Combination Disclosure [Text Block] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Summary of stock option valuation assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Legal Entity [Axis] Legal Entity [Axis] Effect of stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Goodwill [Line Items] Goodwill [Line Items] Provision for accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Income Tax Authority [Axis] Income Tax Authority [Axis] Capital expenditures Payments to Acquire Productive Assets Prepaid and other current assets Prepaid Expense and Other Assets, Current Entity [Domain] Entity [Domain] Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Accrued Liabilities, Current Non-cash compensation expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock Options Share-based Payment Arrangement, Option [Member] Variable Rate [Axis] Variable Rate [Axis] Other (expense) income, net: Other Nonoperating Income (Expense) [Abstract] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Variable Rate [Domain] Variable Rate [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Ovation Ovation [Member] Ovation Credit Services Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Revenue of acquirees since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Lehman Brothers Holdings Inc. v. LendingTree, LLC Lehman Brothers Holdings Inc. v. LendingTree, LLC [Member] Lehman Brothers Holdings Inc. v. LendingTree, LLC [Member] Nondeductible executive compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount Long-term debt, fair value Long-term Debt, Fair Value One year from the grant date Tranche 2 [Member] Tranche 2 [Member] Residential Funding Co. v Home Loan Center Residential Funding Co. v Home Loan Center [Member] Residential Funding Co. v Home Loan Center [Member] Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Intangible Assets Intangible Assets, Net (Excluding Goodwill) [Abstract] Revolving credit facility, letter of credit participation fee percentage Line of Credit Facility, Letter of Credit Participation Fee Percentage Line of Credit Facility, Participation Fee Hosting Arrangement [Domain] Hosting Arrangement [Domain] Hosting Arrangement Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Schedule of accrued expenses and other current liabilities Schedule of Accrued Liabilities [Table Text Block] Award Type [Axis] Award Type [Axis] Schedule of lease maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total shareholders' equity Balance Balance Expected impact to retained earnings due to adoption of ASU 2020-06 Stockholders' Equity Attributable to Parent Settled Litigation Settled Litigation [Member] City Area Code City Area Code Restricted cash and cash equivalents Restricted cash and cash equivalents Restricted Cash and Cash Equivalents, Current Options exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value EQUITY INVESTMENT Equity Method Investments and Joint Ventures Disclosure [Text Block] Accumulated amortization Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, Accumulated Amortization Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Covenant threshold Debt Instrument Covenant Borrowing Capacity Threshold Debt Instrument Covenant Borrowing Capacity Threshold Purchase of treasury stock Payments for Repurchase of Common Stock Software development costs, depreciation period Depreciation period (in years) Property, Plant and Equipment, Useful Life SHAREHOLDERS' EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Certain Risks and Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Operating lease liabilities Operating Lease, Liability, Noncurrent Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Aggregate principal amount Debt Instrument, Face Amount Current income tax expense (benefit) Current Income Tax Expense (Benefit) Expected volatility, maximum (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Income tax benefit related to non-cash compensation Share-based Payment Arrangement, Expense, Tax Benefit Share price (in dollars per share) Share Price Revolving credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage RSUs Restricted Stock Units (RSUs) [Member] Schedule of assets acquired and liabilities assumed in a business acquisition Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Business Acquisition [Line Items] Business Acquisition [Line Items] Performance measurement period two Share-based Payment Arrangement, Tranche Two [Member] Schedule of cash, cash equivalents, restricted cash and restricted cash equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Home Home Home Segment [Member] Home Segment [Member] Equity investment (Note 8) Equity Method Investments Entity Registrant Name Entity Registrant Name Deferred tax assets and deferred tax liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Gross carrying amount Convertible Debt Brand and other marketing expense Other Selling and Marketing Expense Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Income tax (expense) benefit Income tax expense (benefit) Income Tax Expense (Benefit) Changes in goodwill Goodwill, Other Increase (Decrease) Accounts receivable (net of allowance of $1,456 and $1,402, respectively) Accounts Receivable, after Allowance for Credit Loss, Current Purchase period Share-Based Compensation Arrangement By Share-based Payment Award, Purchase Period Share-Based Compensation Arrangement By Share-based Payment Award, Purchase Period Entity Tax Identification Number Entity Tax Identification Number Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total lease payments Lessee, Operating Lease, Liability, to be Paid Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Increase (decrease) in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Stash Financial, Inc. Stash Financial, Inc. [Member] Stash Financial, Inc. [Member] Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Equity method investment Equity Method Investment, Aggregate Cost Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Current portion of long-term debt Long-term Debt, Current Maturities Unrecognized tax benefits including interest Unrecognized Tax Benefits Including Interest Represents the amount of unrecognized tax benefits including interest, as of the balance sheet date. Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Cash flows from financing activities attributable to continuing operations: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Debt issuance costs, equity component Debt issuance costs, equity component Debt issuance costs, equity component Weighted average fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Other Stockholders' Equity, Other 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Disposal Group Name [Domain] Disposal Group Name [Domain] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Debt issuance costs, gross Debt Issuance Costs, Gross Deferred tax assets: Components of Deferred Tax Assets [Abstract] Amortization of debt discount Amortization of Debt Discount (Premium) Litigation Case [Axis] Litigation Case [Axis] Damages Damages [Member] Damages [Member] Other income Other income Other Income Recognition of a liability Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Other commitments Other Commitment Effect of dilutive share awards (in shares) IncrementalCommonSharesAttributableToRestrictedStockUnits IncrementalCommonSharesAttributableToRestrictedStockUnits LIABILITIES: Liabilities [Abstract] Delayed Draw Term Loan Delayed Draw Term Loan [Member] Delayed Draw Term Loan Counterparty Name [Domain] Counterparty Name [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Weighted Average Amortization Life Weighted Average [Member] Six years from the grant date Tranche 7 [Member] Tranche 7 [Member] Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Type of Adoption [Domain] Accounting Standards Update [Domain] Research and experimentation tax credit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Schedule of balance of intangible assets, net Schedule of Intangible Assets and Goodwill [Table Text Block] Interest expense, excluding amortization Interest Expense, Debt, Excluding Amortization Auditor Location Auditor Location Proceeds from the sale of warrants related to the 0.50% Convertible Senior Notes Proceeds from issuance of warrants Proceeds from Issuance of Warrants Segment Reporting [Abstract] Segment Reporting [Abstract] Weighted Average Amortization Life Finite-Lived Intangible Asset, Useful Life Accounting Estimates Use of Estimates, Policy [Policy Text Block] Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Matching contribution per participant dollar contributed Defined Contribution Plan Employer Matching Contribution Per Participant Dollar Contributed Represents maximum amount by the terms of the plan, that the employer may contribute for each dollar to a defined contribution plan. Title of 12(b) Security Title of 12(b) Security Investment, Name [Domain] Investment, Name [Domain] Common stock, authorized shares Common Stock, Shares Authorized Weighted average price of shares purchased (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased Title of Individual [Axis] Title of Individual [Axis] Net income (loss) and comprehensive income (loss) Net income (loss) and comprehensive income (loss) Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Offering period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Product and Service [Domain] Product and Service [Domain] Interest rate Interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Renewal term Lessee, Operating Lease, Renewal Term Contingent consideration liability Business Combination, Contingent Consideration, Liability Discontinued operations Discontinued Operations [Member] STOCK-BASED COMPENSATION Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving Credit Facility Revolving Credit Facility [Member] Other Other Segments [Member] Summary of lease costs Lease, Cost [Table Text Block] Ratio of debt to EBITDA Ratio of Debt to EBITDA Ratio of Debt to EBITDA Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Revolving credit facility, debt issuance costs Debt Instrument, Fee Amount State State and Local Jurisdiction [Member] Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Vesting [Domain] Vesting [Domain] Post-exercise holding requirement period (in years) Share-based Compensation Arrangements by Share-based Payment Award, Options, Post-Exercise Holding Requirement Share-based Compensation Arrangements by Share-based Payment Award, Options, Post-Exercise Holding Requirement SUBSEQUENT EVENT Subsequent Events [Text Block] Schedule of revenue and net loss of the discontinued operations Schedule of Disposal Groups Including Discontinued Operations, Income Statement [Table Text Block] Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations Cost of revenue (exclusive of depreciation and amortization shown separately below) Cost of Revenue Net cash (used in) provided by financing activities attributable to continuing operations Net Cash Provided by (Used in) Financing Activities Treasury stock; 2,975,571 and 2,641,318 shares, respectively Treasury Stock, Value Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Schedule of changes in outstanding non-vested RSUs, restricted stock and RSUs with performance conditions Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Segment cost of revenue and marketing expense Cost of Revenue and Marketing Expense Cost of Revenue and Marketing Expense FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Severance Severance Restructuring Charges Concentration Risk Type [Axis] Concentration Risk Type [Axis] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Proceeds from revolving credit facility Proceeds from Long-term Lines of Credit Surety bond Surety Bond [Member] Proceeds from the issuance of 0.50% Convertible Senior Notes Proceeds from Convertible Debt Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Cost of revenue Other Cost of Operating Revenue Document Period End Date Document Period End Date Net working capital Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Working Capital Amount recognized as of the acquisition date for the identifiable current assets acquired in excess of (less than) the aggregate current liabilities assumed. Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Maximum number of shares for earned (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Shares To Be Earned Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Shares To Be Earned State Deferred State and Local Income Tax Expense (Benefit) Cash flows from investing activities attributable to continuing operations: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Schedule of depreciation period for each asset category Property, Plant and Equipment [Table Text Block] Revolving credit facility, term Debt Instrument, Term Income Statement Location [Domain] Income Statement Location [Domain] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Property and equipment (net of accumulated depreciation of $28,315 and $20,238, respectively) Total property and equipment, net Property, Plant and Equipment, Net Capacity available for general corporate purchases Line Of Credit Facility Capacity Available For General Corporate Purchases Line Of Credit Facility Capacity Available For General Corporate Purchases Schedule of amortization of intangible assets with definite lives estimated future amortization Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Hosting Arrangement that is a Service Contract Hosting Arrangement, Service Contract, Policy [Policy Text Block] Hosting Arrangement, Service Contract, Policy Net income (loss) per share: Earnings Per Share [Abstract] Contribution to LendingTree Foundation Charitable Contribution Accrual, Current Charitable Contribution Accrual, Current Total gross property and equipment Property, Plant and Equipment, Gross Balance, beginning of the period Balance, end of the period Accounts Receivable, Allowance for Credit Loss Unrealized gain on equity method investment Equity Securities, FV-NI, Unrealized Gain (Loss) Revenue Revenue from Contract with Customer Benchmark [Member] Revenue Revenue Revenues ValuePenguin ValuePenguin [Member] ValuePenguin [Member] Basic (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Outstanding at the beginning of the period (in dollars per share) Outstanding at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Nonconvertible debt borrowing rate at the date of issuance (percentage) Nonconvertible Debt Borrowing Rate at the Date of Issuance Nonconvertible Debt Borrowing Rate at the Date of Issuance Costs and expenses: Costs and Expenses [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Entity Current Reporting Status Entity Current Reporting Status Expected volatility, minimum (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Amortization of debt issuance costs Amortization of Debt Issuance Costs Counterparty Name [Axis] Counterparty Name [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Loss (gain) on impairments and disposal of assets Gain (Loss) on Disposition of Property Plant Equipment Hosting Arrangement [Axis] Hosting Arrangement [Axis] Hosting Arrangement Balance (in shares) Balance (in shares) Shares, Issued Dividends Dividends Revolving credit facility, letter of credit fronting fee percentage Line of Credit Facility, Letter of Credit Fronting Fee Percentage Line of Credit Facility, Letter of Credit Fronting Fee Percentage Conversion option one Debt Instrument, Redemption, Period One [Member] Common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Aggregate Intrinsic Value Share Based Compensation Arrangement by Share Based Payment Award, Options, Aggregate Intrinsic Value [Abstract] -- None. No documentation exists for this element. -- Leases [Abstract] Leases [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] LIBOR London Interbank Offered Rate (LIBOR) [Member] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Diluted (in shares) Weighted average diluted common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted INCOME TAXES Income Tax Disclosure [Text Block] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Summary of changes in outstanding stock options Share-based Payment Arrangement, Option, Activity [Table Text Block] Revolving credit facility, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Issuance of 0.50% Convertible Senior Notes, net Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Loan loss obligations Obligation to Repurchase Receivables Sold [Member] Credit Facility [Axis] Credit Facility [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One Accumulated depreciation Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of capitalized implementation costs Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] General and administrative expense General and Administrative Expense [Member] Entity Shell Company Entity Shell Company Expected term (in years) Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Employee Stock Purchase Plan Employee Stock [Member] Litigation Status [Domain] Litigation Status [Domain] Capital additions from tenant improvement allowance Lease Obligation Incurred Accounts payable, trade Accounts Payable, Trade, Current Loss Contingencies [Table] Loss Contingencies [Table] Current Fiscal Year End Date Current Fiscal Year End Date Net cash provided by operating activities attributable to continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Hosting arrangement, amortization period Hosting Arrangement, Service Contract, Implementation Cost, Amortization Period Hosting Arrangement, Service Contract, Implementation Cost, Amortization Period Number of defendants Loss Contingency, Number of Defendants Statement [Table] Statement [Table] Term of plan Share Based Compensation Arrangements by Share Based Payment Award, Options Expiration Term The period of time, from the grant date until the time at which the share-based [option] award expires. Recent Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Other Deferred Tax Assets, Other Weighted average assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] 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 Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Accounts Receivable Accounts Receivable [Policy Text Block] Charitable contribution Charitable Contribution Charitable Contribution Subsequent Event Subsequent Event [Member] 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Payment Contingent Consideration Payment Operating lease cost Operating Lease, Cost RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Maximum contribution by employer (percentage) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Aircraft and automobile Aircraft and automobile Automobiles [Member] Deferred income taxes Deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit) Number of loan originators Loss Contingency, Number Of Loan Originators Loss Contingency, Number Of Loan Originators Payment of original issue discount on undrawn term loan Payments of Loan Costs Value of common stock authorized to be repurchased Stock Repurchase Program, Authorized Amount Convertible Debt Convertible Debt [Member] Trademarks and tradenames Trademarks and tradenames Trademarks and Trade Names [Member] HOSTING ARRANGEMENTS Other Assets Disclosure, Hosting Arrangements [Text Block] Other Assets Disclosure, Hosting Arrangements Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Realized gain from sale of equity method investment Equity Method Investment, Realized Gain (Loss) on Disposal Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Accrued compensation and benefits Employee-related Liabilities, Current Income Statement Location [Axis] Income Statement Location [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Segment Reporting Segment Reporting, Policy [Policy Text Block] 2025 Notes Under 13-day Purchase Option 2025 Notes Under 13-day Purchase Option [Member] 2025 Notes Under 13-day Purchase Option [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Proceeds from the sale of fixed assets Proceeds from Sale of 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Percentage Projects in progress Servicing Contracts, Projects in Progress [Member] Servicing Contracts, Projects in Progress Non-cash compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Amended Revolving Credit Facility Amended Revolving Credit Facility [Member] Amended Revolving Credit Facility DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Credit agreement, ratio of debt to EBITDA Credit Agreement, Ratio of Debt to EBITDA Credit Agreement, Ratio of Debt to EBITDA Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Computer equipment and capitalized software Computer equipment and capitalized software Computer Equipment and Capitalized Software [Member] Represents the computer equipment and capitalized software held by the entity for its use in production of products and services in which the entity deals, and are subject to depreciation, depletion and amortization. Valuation Allowance [Abstract] Valuation Allowance [Abstract] Earnings of acquiree since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Vested fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title of Individual [Domain] Title of Individual [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] Credit Facility [Domain] Credit Facility [Domain] Schedule of contingent considerations Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block] ASSETS: Assets [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Accumulated Impairment Loss Goodwill, Impaired, Accumulated Impairment Loss Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Pro forma net income from continuing operations Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Concentration risk Concentration Risk, Percentage Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Accounts payable, accrued expenses and other current liabilities Increase (Decrease) in Accounts Payable and Other Current Liabilities This element represent increase or decrease in accounts payable and other current liabilities Prepaid and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Debt Instrument [Axis] Debt Instrument [Axis] Advertising Advertising Cost [Policy Text Block] Net proceeds from the convertible notes used to pay for the cost of the convertible note hedge Net proceeds from the Convertible Notes used to pay for the cost of the Convertible Note Hedge Net proceeds from the Convertible Notes used to pay for the cost of the Convertible Note Hedge Impairment loss on equity method investments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Percent of domestic subsidiaries equity Line of Credit Facility, Collateral, Percent of Domestic Subsidiaries Equity Line of Credit Facility, Collateral, Percent of Domestic Subsidiaries Equity Unaudited pro forma revenue and net income from continuing operations of business acquisition Business Acquisition, Pro Forma Information [Table Text Block] Home Loan Center, Inc. Home Loan Center, Inc. [Member] Home Loan Center, Inc. [Member] Schedule of components of the deferred tax assets and deferred tax liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Excess tax benefit, including state taxes, in income tax expense Excess Tax Benefit on Stock Compensation, Income Tax Expense (Benefit) Excess Tax Benefit on Stock Compensation, Income Tax Expense (Benefit) Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] QuoteWizard QuoteWizard [Member] QuoteWizard [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Number of operating segments Number of Operating Segments Cash proceeds from ESPP Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding 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[Roll Forward] Goodwill [Roll Forward] Diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Reconciliation of unrecognized tax benefits, excluding interest Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Software development Software Development [Member] Judicial Ruling Judicial Ruling [Member] Components of the income tax provision (benefit) Income Tax Expense (Benefit), Continuing Operations [Abstract] DepositAccounts DepositAccounts [Member] DepositAccounts [Member] Total liabilities and shareholders' equity Liabilities and Equity Service period one Service Period One [Member] Service Period One [Member] Customer deposits and escrows Customer Deposits and Escrows, Current Customer Deposits and Escrows, Current Diluted (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Performance measurement period one Share-based Payment Arrangement, Tranche One [Member] Contract liability Contract with Customer, Liability, Current 2026 Lessee, Operating Lease, Liability, to be Paid, Year Five Insurance Insurance Insurance Segment [Member] Insurance Segment [Member] Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Nonvested RSUs and RSAs, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Non-cash investing activities: Supplemental Cash Flow Elements [Abstract] Exercise of option, tax benefit Share-based Payment Arrangement, Exercise of Option, Tax Benefit Certain Risks and Concentrations Concentration Risk [Line Items] ORGANIZATION Business Description and Basis of Presentation [Text Block] Cash flows from operating activities attributable to continuing operations: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] SHAREHOLDERS' EQUITY Earnings Per Share [Text Block] Purchase of treasury stock Value of treasury stock acquired Treasury Stock, Value, Acquired, Cost Method Minimum Minimum [Member] Carrying amount of debt, equity component Debt Instrument, Convertible, Carrying Amount of Equity Component Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Segment profit Gross Profit Line of credit outstanding Long-term Line of Credit 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Preferred stock, authorized shares Preferred Stock, Shares Authorized Service period three and after Service Period Three and Thereafter [Member] Service Period Three and Thereafter [Member] Audit Information [Abstract] Audit Information Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Non-current assets of discontinued operations Deferred Tax Asset, Parent's Basis in Discontinued Operation Revenue Recognition Revenue [Policy Text Block] Payments to acquire business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Schedule of components of the income tax provision (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Line of Credit Line of Credit [Member] Intangible assets Deferred Tax Assets, Goodwill and Intangible Assets STOCK-BASED COMPENSATION Share-based Payment Arrangement [Text Block] Requisite service period for matching contribution Defined Contribution Plan Requisite Service Period for Employer Matching Contribution The requisite service period for eligibility for matching contribution by the employer. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Contingent consideration payment, operating Payment for Contingent Consideration Liability, Operating Activities Uncertain tax positions Effective Income Tax Rate Reconciliation, Uncertain Tax Positions, Amount Effective Income Tax Rate Reconciliation, Uncertain Tax Positions, Amount Equity investment Deferred Tax Liabilities, Investments Number of reportable segments Number of Reportable Segments 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 Interest limitation Deferred Tax Asset, Interest Limitation Deferred Tax Asset, Interest Limitation Service period two Service Period Two [Member] Service Period Two [Member] Accrued professional fees Accrued Professional Fees, Current Letters of credit outstanding Letters of Credit Outstanding, Amount Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Performance Shares Performance Shares [Member] Commitments and contingencies (Notes 16 and 17) Commitments and Contingencies Premium percentage Debt Instrument Redemption Price Premium Percentage Debt Instrument Redemption Price Premium Percentage Subsequent Event [Table] Subsequent Event [Table] Debt Issuance Costs, Net [Abstract] Debt Issuance Costs, Net [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Accounts receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Three years from the grant date Tranche 6 [Member] Tranche 6 [Member] Payment of debt issuance costs Payments of Debt Issuance Costs Disposal Group Classification [Axis] Disposal Group Classification [Axis] Number of active plans Share Based Compensation Arrangement by Share Based Payment Award, Number of Active Plans Represents the number of active plans under which future awards may be granted. Auditor Name Auditor Name Cover [Abstract] Total costs and expenses Costs and Expenses Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Treasury stock, shares Treasury Stock, Shares Net cash provided by (used in) operating activities attributable to discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Segment, Operating Activities [Domain] Operating Activities [Domain] Cash Cash Warrant transactions Adjustments to Additional Paid in Capital, Warrant Transactions Adjustments to Additional Paid in Capital, Warrant Transactions Income taxes receivable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Current income tax expense (benefit): Current Income Tax Expense (Benefit), Continuing Operations [Abstract] SnapCap SnapCap [Member] SnapCap Common Stock Common Stock [Member] Operating income (loss) Operating Income (Loss) Current lease liabilities Operating Lease, Liability, Current (Decrease) increase in capital expenditures included in accounts payable and accrued expenses Increase (Decrease) in Capital Expenditures Incurred but Not yet Paid Increase (Decrease) in Capital Expenditures Incurred but Not yet Paid 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Non-cash compensation expense Share-based Payment Arrangement, Noncash Expense Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation Depreciation Total cash provided by (used in) discontinued operations Net Cash Provided by (Used in) Discontinued Operations Technology Technology Technology-Based Intangible Assets [Member] Treasury Stock Treasury Stock [Member] Working capital adjustment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital Income tax payments Income Taxes Paid Current lease liability, statement of financial position Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other Other Liabilities, Current Total liabilities Liabilities Liabilities 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period LEASES Lessor, Operating Leases [Text Block] Operating loss carryforwards Operating Loss Carryforwards Common stock, issued shares Common Stock, Shares, Issued Preferred stock, issued shares Preferred Stock, Shares Issued Payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Less Than 1 year Commitment Expiration Related to Performance and Completion of Contracts within One Year Represents the amount of commitment expiration in the first year after the balance sheet date related to performance and completion of contracts. Termination of warrants related to the 0.625% Convertible Senior Notes Payments for repurchase of warrants Payments for Repurchase of Warrants Entity Address, City or Town Entity Address, City or Town Customer one Customer One [Member] Represents details related to customer one. Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Conversion rate, number of shares per $1,000 of principal Debt Conversion, Number of Shares of Common Stock Convertible per $1,000 of Principal Notes Debt Conversion, Number of Shares of Common Stock Convertible per $1,000 of Principal Notes Schedule of reconciliation of beginning and ending amounts of unrecognized tax benefits, excluding interest and penalties Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Risk-free interest rate, minimum (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum ASU 2016-02 Accounting Standards Update 2016-02 [Member] Interest expense, net Interest Expense Deferred income tax provision (benefit): Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Interest rate Debt Instrument, Interest Rate, Effective Percentage Discontinued operations: Discontinued Operations and Disposal Groups [Abstract] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] 2017 Warrants 2017 Warrants [Member] 2017 Warrants [Member] Accumulated deficit Retained Earnings (Accumulated Deficit) Litigation Case [Domain] Litigation Case [Domain] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Entity Filer Category Entity Filer Category Gain on investments Gain (Loss) on Investments Risk free rate (percentage) Risk-free interest rate (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Concentration Risk [Table] Concentration Risk [Table] Termination of convertible note hedge on the 0.625% Convertible Senior Notes Proceeds from hedge and warrant terminations Proceeds from Hedge, Financing Activities Other non-current assets Other Noncurrent Assets [Member] Proceeds from stock options exercised Proceeds from Stock Options Exercised Intangible assets with indefinite lives Indefinite-lived Intangible Assets (Excluding Goodwill) Unamortized capitalized software development costs Capitalized Computer Software, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Selling and marketing expense Selling and Marketing Expense [Member] Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt, before Write off of Debt Issuance Cost Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of supplemental cash flow LesseeOperatingLeasesSupplementalCashFlowInformationandNoncashActivityTable [Table Text Block] Lessee operating leases supplemental cash flow information and noncash activity table Federal Deferred Federal Income Tax Expense (Benefit) Equity Method Investments and Joint Ventures [Abstract] Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Ratio of debt to EBITDA Increase Ratio of Debt to EBITDA Increase Ratio of Debt to EBITDA Increase Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Charges to earnings Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Non-current contingent consideration Business Combination, Contingent Consideration, Liability, Noncurrent Number of renewal options Lessee, Operating Lease, Number Of Renewal Options Lessee, Operating Lease, Number Of Renewal Options Product and Service [Axis] Product and Service [Axis] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Entity Public Float Entity Public Float Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Chairman and Chief Executive Officer Chief Executive Officer [Member] Short-term lease cost Short-term Lease, Cost Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Lehman Brothers Holdings, Inc. Lehman Brothers Holdings, Inc. Demand Letter [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Selling and marketing expense Selling and Marketing Expense Disposed of by sale Discontinued Operations, Disposed of by Sale [Member] Shares purchased for award Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Four years from the grant date Tranche Four [Member] Tranche Four Convertible debt, noncurrent Convertible Debt, Noncurrent Statement [Line Items] Statement [Line Items] Equity Award Plan Equity Award Plan [Member] Equity Award Plan [Member] Amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Credit Agreement Credit Agreement [Member] Credit Agreement Issuance of common stock for stock options, employee stock purchase plan, restricted stock awards and restricted stock units, net of withholding taxes Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Software Development Costs Internal Use Software, Policy [Policy Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Accrued expenses and other current liabilities Accrued Liabilities, Current [Abstract] Purchase price of common stock, percent Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Less: valuation allowance Balance, beginning of the period Balance, end of the period Deferred Tax Assets, Valuation Allowance Current liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Current Revenue Disposal Group, Including Discontinued Operation, Revenue Capitalized implementation costs Servicing Contracts, Implementation Costs [Member] Servicing Contracts, Implementation Costs Loss per share from discontinued operations: Income (Loss) from Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] -- None. No documentation exists for this element. -- Major Customers [Axis] Customer [Axis] BENEFIT PLANS Retirement Benefits [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Document Annual Report Document Annual Report Employer matching contribution, vested percentage Defined Contribution Plan, Employer Matching Contribution, Vested Percent Defined Contribution Plan, Employer Matching Contribution, Vested Percent Schedule of non-cash compensation expense related to equity awards Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Vesting [Axis] Vesting [Axis] Total assets Assets Assets Litigation settlements and contingencies Gain (Loss) Related to Litigation Settlement Plan Name [Domain] Plan Name [Domain] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Less: Tenant improvement allowances Lessee Operating Lease, Liability, Undiscounted Excess Amount, Tenant Improvement Allowances Lessee Operating Lease, Liability, Undiscounted Excess Amount, Tenant Improvement Allowances Product development Product development Research and Development Expense Commitment Guarantor Obligations [Line Items] Gain on disposal Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Performance-Based Restricted Stock Performance-Based Restricted Stock [Member] Performance-Based Restricted Stock [Member] Leasing Deferred Tax Liability, Operating Lease Deferred Tax Liability, Operating Lease SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Litigation Status [Axis] Litigation Status [Axis] Generally the maximum amount a participant may contribute in accordance with statutory limits Defined Contribution Plan Employee Contributions of Pretax Base Salary Approximate Statutory Limit Generally, the maximum amount an employee may contribute to a defined contribution plan for the calendar year in accordance with statutory limits. Schedule of debt Schedule of Debt [Table Text Block] Furniture and other equipment Furniture and other equipment Furniture and Fixtures [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Net proceeds from hedge and warrants Proceeds from Hedge and Warrants Proceeds from Hedge and Warrants Diluted (in dollars per share) Earnings Per Share, Diluted Basic (in shares) Weighted average basic common shares (in shares) Weighted Average Number of Shares Outstanding, Basic Segments [Domain] Segments [Domain] Weighted average shares outstanding: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Intangible assets, net Total intangible assets, net Intangible Assets, Net (Excluding Goodwill) Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage Of Stock Price Trigger, Five Business Days Debt Instrument, Convertible, Threshold Percentage Of Stock Price Trigger, Five Business Days Deferred income tax liabilities Deferred income tax liabilities Deferred Income Tax Liabilities, Net Impact of certain state legislation, net Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Fixed assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Basic (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Loss from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of reconciliation of total income tax provision (benefit) to amounts computed by applying statutory federal income tax rate to income (loss) from continuing operations before income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Bad debt expense Other Noncash Expense Depreciation Depreciation Depreciation, Depletion and Amortization Contract asset Contract with Customer, Asset, after Allowance for Credit Loss Effect of Convertible Senior Notes and warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Common stock, outstanding shares Common Stock, Shares, Outstanding Hosting arrangement, amortization expense Hosting Arrangement, Service Contract, Implementation Cost, Expense, Amortization Entity Central Index Key Entity Central Index Key Exercise price premium (percentage) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Exercise Price Premium Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Exercise Price Premium DISCONTINUED OPERATIONS Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Total lease cost Lease, Cost Accrued advertising expense Accrued Advertising, Current Additions (subtractions) based on tax positions of the prior period Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Repurchased amount, accrued interest Debt Instrument, Repurchased Amount, Accrued Interest Debt Instrument, Repurchased Amount, Accrued Interest Contingencies Loss Contingencies [Line Items] PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Other non-current liabilities Other Liabilities, Noncurrent Statement, Operating Activities Segment [Axis] Operating Activities [Axis] Pro Forma Pro Forma [Member] Total cash provided by (used in) continuing operations Net Cash Provided by (Used in) Continuing Operations Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired Debt Instrument [Line Items] Debt Instrument [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Trading Symbol Trading Symbol Pro forma revenue Business Acquisition, Pro Forma Revenue Consumer Consumer Consumer Segment [Member] Consumer Segment [Member] Percent of voting equity Line of Credit Facility, Collateral, Percent of Voting Equity Line of Credit Facility, Collateral, Percent of Voting Equity Other Deferred Tax Liabilities, Other Exercise price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Line of Credit Facility [Table] Line of Credit Facility [Table] 2022 Convertible Notes 2022 Convertible Notes [Member] 2022 Convertible Notes [Member] Common Stock Repurchases Disclosure of Repurchase Agreements [Abstract] Long-Lived Assets and Intangible Assets with Definite Lives Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Goodwill Goodwill, Gross Personal loans Personal Loans [Member] Personal Loans [Member] Long-term debt Net carrying amount Long-term Debt, Excluding Current Maturities Market-Based Restricted Stock Market-Based Restricted Stock [Member] Market-Based Restricted Stock Schedule of Goodwill [Table] Schedule of Goodwill [Table] Total non-cash compensation Share-based Payment Arrangement, Expense Cost of Revenue Cost of Goods and Service [Policy Text Block] Options exercisable at the end of the period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Income (loss) per share from continuing operations: Earnings Per Share, Basic and Diluted [Abstract] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Total gross Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, before Accumulated Amortization Payables and Accruals [Abstract] Payables and Accruals [Abstract] Projects in progress Construction in Progress [Member] 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 equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Total Amounts Committed Guarantor Obligations, Maximum Exposure, Undiscounted Risk-free interest rate, maximum (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Other financing activities Proceeds from (Payments for) Other Financing Activities Cost Finite-Lived Intangible Assets, Gross Payment of convertible note hedge on the 0.50% Convertible Senior Notes Payment of convertible note hedge transactions Payments for Hedge, Financing Activities Schedule of intangible assets with definite lives Schedule of Finite-Lived Intangible Assets [Table Text Block] Capitalized software development depreciation expense Capitalized Computer Software, Amortization Federal Internal Revenue Service (IRS) [Member] Loss from discontinued operations, net of tax Less: Loss from discontinued operations, net of tax Loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent CASH AND RESTRICTED CASH Restricted Assets Disclosure [Text Block] Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Accrued litigation liabilities Estimated Litigation Liability Premium percentage period Debt Instrument Redemption Price Premium Percentage Period Debt Instrument Redemption Price Premium Percentage Period Non-current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Noncurrent Write-off of uncollectible accounts receivable Accounts Receivable, Allowance for Credit Loss, Writeoff Contingent consideration arrangements, after tax contingent consideration expense Business Combination, Contingent Consideration Arrangements, After Tax Contingent Consideration Expense After tax contingent consideration expense. 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Premium of warrant strike price over sales price of common stock (percentage) Premium of warrant strike price over sales price of common stock Premium of warrant strike price over sales price of common stock Convertible note hedge transactions Adjustments to Additional Paid in Capital, Entry into Convertible Note Hedge Transactions Adjustments to Additional Paid in Capital, Entry into Convertible Note Hedge Transactions Auditor Firm ID Auditor Firm ID Net repayment of revolving credit facility Proceeds from (Repayments of) Secured Debt Purchase of equity investment Payments to Acquire Equity Method Investments Net cash provided by (used in) investing activities attributable to continuing operations Net Cash Provided by (Used in) Investing Activities Changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Loss contingency receivable Loss Contingency, Receivable, Current 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 Excess tax deductions on non-cash compensation Proceeds And Excess Tax Benefit From Share based Compensation, Federal Proceeds And Excess Tax Benefit From Share based Compensation, Federal Acquisition purchase consideration Payments to Acquire Businesses, Gross 1-3 years Commitment Expiration Related to Performance and Completion of Contracts Due within Second and Third Year Represents the amount of commitment expiration within the second and third year after the balance sheet date related to performance and completion of contracts. Defined Contribution Plan [Table] Defined Contribution Plan [Table] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Schedule of the deferred tax valuation allowance reconciliation Summary of Valuation Allowance [Table Text Block] Schedule of definite-lived intangible assets acquired in a business acquisition Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] SEGMENT INFORMATION Segment Reporting Information [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Current Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Long-lived assets located outside the United States Long-Lived Assets Fed Funds Effective Rate Overnight Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Customer lists Customer Lists [Member] Contingent liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Advertising expense Advertising Expense Schedule of property and equipment, net Schedule of Property, Plant and Equipment Components [Table Text Block] Tabular disclosure of the components of property, plant and equipment. Prepaid and other current assets Prepaid Expenses and Other Current Assets [Member] Federal statutory income tax Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Extinguishment of debt Extinguishment of Debt, Amount Cost of revenue Cost of Sales [Member] Write-off of previously-capitalized debt issuance costs Write off of Deferred Debt Issuance Cost State operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards, State and Local Common stock $.01 par value; 50,000,000 shares authorized; 16,070,720 and 15,766,193 shares issued, respectively, and 13,095,149 and 13,124,875 shares outstanding, respectively Common Stock, Value, Outstanding Potential additional borrowing capacity Credit Agreement, Potential Additional Borrowing Capacity Credit Agreement, Potential Additional Borrowing Capacity Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Unamortized debt discount Debt Instrument, Unamortized Discount More Than 5 years Commitment Expiration Related to Performance and Completion of Contract Due after Fifth Year Represents the amount of commitment expiration after the fifth year of the balance sheet date related to performance and completion of contracts. Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] DEBT Long-term Debt [Text Block] Schedule of employee stock purchase plan valuation assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]