Business Combinations [Abstract] Unaudited pro forma revenue and net income from continuing operations of business acquisitions Business Acquisition, Pro Forma Information [Table Text Block] Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Mortgage products Mortgage Products [Member] Mortgage Products [Member] Credit Cards Credit Cards [Member] Credit Cards [Member] Personal Loans Personal Loans [Member] Personal Loans [Member] Other Products And Services Other Products And Services [Member] Other Products And Services [Member] Non-mortgage products Non-mortgage Products [Member] Non-mortgage Products [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue Revenues Contract asset Contract with Customer, Asset, Net Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] Selling and marketing expense Selling and Marketing Expense [Member] General and administrative expense General and Administrative Expense [Member] Product development Research and Development Expense [Member] Non-cash compensation expense related to equity awards Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Total non-cash compensation Allocated Share-based Compensation Expense Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Employee stock options Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Annual interest rate on convertible senior notes Debt Instrument, Interest Rate, Effective Percentage Calculation of weighted average common shares Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average common shares, basic Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Effect of stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Effect of dilutive share awards (in shares) IncrementalCommonSharesAttributableToRestrictedStockUnits IncrementalCommonSharesAttributableToRestrictedStockUnits Effect of Convertible Senior Notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Weighted average common shares, diluted Weighted Average Number of Shares Outstanding, Diluted Common stock repurchases Disclosure of Repurchase Agreements [Abstract] Value of common stock authorized to be repurchased Stock Repurchase Program, Authorized Amount Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] ORGANIZATION Business Description and Basis of Presentation [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Information Segment Reporting Information [Line Items] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Contingent earnout Earnout Payment for One Contingent Earnout [Member] Earnout Payment for One Contingent Earnout [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] CompareCards CompareCards [Member] CompareCards [Member] DepositAccounts DepositAccounts [Member] DepositAccounts [Member] SnapCap SnapCap [Member] SnapCap Business Acquisition Business Acquisition [Line Items] Initial cash consideration to acquire business Payments to Acquire Businesses, Gross Number of payments Business Combination, Number Of Payments Business Combination, Number Of Payments Contingent consideration range, minimum Business Combination, Indemnification Assets, Range of Outcomes, Value, Low Contingent consideration range, maximum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Purchase price consideration on acquisition date Business Combination, Consideration Transferred Contingent consideration Business Combination, Contingent Consideration, Liability Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Financing Activities Current contingent consideration Business Combination, Contingent Consideration, Liability, Current Non-current contingent consideration Business Combination, Contingent Consideration, Liability, Noncurrent Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Contingent consideration payment Payment for Contingent Consideration Liability, Investing Activities Value of potential contingent consideration payments based on specified increases in federal funds interest rates Business Combination, Contingent Consideration, Individual Payments Based on Specified Increases in Federal Funds Interest Rates Business Combination, Contingent Consideration, Individual Payments Based on Specified Increases in Federal Funds Interest Rates One-time contingent consideration performance payment Business Combination, Contingent Consideration, One-Time Performance Payment Business Combination, Contingent Consideration, One-Time Performance Payment Pro forma revenue Business Acquisition, Pro Forma Revenue Pro forma net income from continuing operations Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax After tax contingent consideration tax Business Combination, Contingent Consideration Arrangements, After Tax Contingent Consideration Expense After tax contingent consideration expense. Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Cash flows from operating activities attributable to continuing operations: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income and comprehensive income Net Income (Loss) Available to Common Stockholders, Basic Less: Loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Loss on disposal of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Amortization of intangibles Amortization of Intangible Assets Depreciation Depreciation, Depletion and Amortization Rental amortization of intangibles and depreciation Other Depreciation and Amortization Non-cash compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Noncash Expense (Benefit) The noncash component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. Bad debt expense Provision for Doubtful Accounts Amortization of debt issuance costs Amortization of Debt Issuance Costs Amortization of convertible debt discount Amortization of Debt Discount (Premium) Changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid and other current assets Increase (Decrease) in Prepaid Expense and Other Assets 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 Income taxes receivable Increase (Decrease) in Income Taxes Payable Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities attributable to continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities attributable to continuing operations: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Capital expenditures Payments to Acquire Productive Assets Acquisition of SnapCap Other Payments to Acquire Businesses Payments for (Proceeds from) Other Investing Activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities attributable to continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities attributable to continuing operations: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Proceeds from stock options exercised Proceeds from Stock Options Exercised Payments Related to Tax Withholding for Share-based Compensation Payments Related to Tax Withholding for Share-based Compensation Contingent consideration payments not made soon after acquisition date Payment of debt issuance costs Payments of Debt Issuance Costs Purchase of treasury stock Payments for Repurchase of Common Stock Net cash used in financing activities attributable to continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Total cash (used in) provided by continuing operations Net Cash Provided by (Used in) Continuing Operations Net cash used in operating activities attributable to discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Total cash used in discontinued operations Net Cash Provided by (Used in) Discontinued Operations 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), Excluding Exchange Rate Effect Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period Accounting Policies [Abstract] Accounting Estimates Use of Estimates, Policy [Policy Text Block] Certain Risks and Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Litigation Settlements and Contingencies Legal Costs, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Debt Disclosure [Abstract] Summary of the gross carrying amount, unamortized debt cost and net carrying value of the liability component of the Notes Convertible Debt [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] STOCK-BASED COMPENSATION Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Nonvested RSUs, Restricted Stock and Restricted Stock Units with Performance Conditions, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested at the end of the period (in shares) Nonvested RSUs, Restricted Stock and Restricted Stock Units with Performance Conditions, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Nonvested at the beginning 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 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 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 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 Nonvested at the end of the period (in dollars per share) REVENUE Revenue from Contract with Customer [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] 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 Payment of convertible note hedge transactions Payments for Hedge, Financing Activities Number of shares covered by the hedge transactions Number of Shares Covered by the Hedge Transactions Number of Shares Covered by the Hedge Transactions Initial conversion price per share Debt Instrument, Convertible, Conversion Price Strike price of warrants sold Class of Warrant or Right, Exercise Price of Warrants or Rights 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 Share price Share Price Proceeds from the sale of warrants Proceeds from Issuance of Warrants Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Technology Developed Technology Rights [Member] Customer lists Customer Lists [Member] Trade name and trademarks Trademarks and Trade Names [Member] Tenant leases Leases, Acquired-in-Place [Member] Website content Media Content [Member] Other Other Intangible Assets [Member] Intangible assets with definite lives Finite-Lived Intangible Assets [Line Items] Cost Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Total intangible assets with definite lives, net Finite-Lived Intangible Assets, Net Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending litigation or appeal Pending Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Residential Funding Company Residential Funding Company [Domain] Residential Funding Company [Domain] Lehman Brothers Holdings, Inc. Demand Letter Lehman Brothers Holdings, Inc. Demand Letter [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Contingencies Loss Contingencies [Line Items] Accrued litigation liability Estimated Litigation Liability Number of loan originators Loss Contingency, Number Of Loan Originators Loss Contingency, Number Of Loan Originators Number of asserted claims Loss Contingency, Pending Claims, Number Damages sought Loss Contingency, Damages Sought, Value Number of defendants Loss Contingency, Number of Defendants Number of loans Loss Contingency, Number Of Loans Loss Contingency, Number Of Loans Schedule of weighted average basic and diluted common shares Schedule of Weighted Average Number of Shares [Table Text Block] Income Tax Disclosure [Abstract] Schedule of income tax (expense) benefit Schedule of income tax provision benefit [Table Text Block] [Table Text Block] for Schedule of income tax provision benefit [Table] Reconciliation of income tax (expense) benefit Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Convertible Notes Payable [Member] Convertible Notes Payable [Member] Aggregate principal amount of convertible senior notes Convertible Debt Initial conversion rate, shares per $1,000 principal amount of notes 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 Principal amount of notes convertible into shares Convertible Preferred Stock, Terms of Conversion Conversion rate, sales price of common stock as a percentage of the conversion price Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Conversion rate, sales price of common stock as a percentage of the conversion price, five business days Debt Instrument, Convertible, Threshold Percentage Of Stock Price Trigger, Five Business Days Debt Instrument, Convertible, Threshold Percentage Of Stock Price Trigger, Five Business Days Cash repurchase at a price equal to the principal amount of the notes, Percentage Debt Instrument, Redemption Price, Percentage Nonconvertible debt borrowing rate at the date of issuance Nonconvertible Debt Borrowing Rate at the Date of Issuance Nonconvertible Debt Borrowing Rate at the Date of Issuance Debt component of the principal amount of the Convertible Senior Notes Convertible Debt, Noncurrent Equity component of the principal amount of the Convertible Senior Notes Debt Instrument, Convertible, Carrying Amount of Equity Component Financing costs related to the issuance of the Convertible Senior Notes Debt Issuance Costs, Gross Debt issuance costs, liability component Debt issuance costs, liability component Debt issuance costs, liability component Debt issuance costs, equity component Debt issuance costs, equity component Debt issuance costs, equity component Total interest expense on the Convertible Senior Notes Interest Expense, Debt Interest expense recognized associated with the 06.25% coupon rate Interest Expense, Debt, Excluding Amortization Long-term debt Long-term Debt, Excluding Current Maturities Fair value of the Convertible Senior Notes using a Level 1 observable input Long-term Debt, Fair Value Unamortized debt discount Debt Instrument, Unamortized Discount Cash and Cash Equivalents [Abstract] Schedule of Restricted Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Investor [Axis] Investor [Axis] Information by investor Investor [Domain] Investor [Domain] [Domain] for Information by investor Investor One [Member] Investor One [Member] Investor One [Member] Investor Two [Member] Investor Two [Member] Investor Two [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Discover Bank Discover Bank [Member] Represents Discover Bank, a wholly owned subsidiary of Discover Financial Services. Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loan loss obligations Obligation to Repurchase Receivables Sold [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Group Name [Domain] Lending Tree Loans Lending Tree Loans [Member] Represents the information pertaining to LendingTree Loans. Statement, Operating Activities Segment [Axis] Operating Activities [Axis] Segment, Operating Activities [Domain] Operating Activities [Domain] Discontinued operations Discontinued Operations [Member] Loan Loss Obligations Restricted cash and cash equivalents Restricted Cash and Cash Equivalents, Current Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Original number of loans sold by HLC Loss Contingencies, Number of Loans Sold Represents the number of loans sold by HLC Original principal balance of loans sold by HLC Loss Contingencies, Original Principal Balance Represents the original principal balance of loans sold by the entity. Subsequent settlements of loans sold by HLC, number Loss Contingencies, Number of Loans Subsequently Settled Loss Contingencies, Number of Loans Subsequently Settled Subsequent settlement of loans sold by HLC, original issue balance Loss Contingencies,Value of Loans Subsequently Settled Loss Contingencies,Value of Loans Subsequently Settled Remaining number of unsettled loans Loss Contingencies, Number of Unsettled Loans Remaining Represents the number of unsettled loans remaining. Remaining unsettled loans, original issue balance Loss Contingencies, Remaining Unsettled Loans Represents the original issue balance remaining on unsettled loans. Settlement value of indemnification claim and other miscellaneous items Loss Contingency, Settlement Value Represents the amount of payment made by the entity towards the settlement with the buyers of previously purchased loans. Number of loans sold to one investor Loss Contingencies, Number of Loans Sold to one investor Loss Contingencies, Number of Loans Sold to one investor Percentage of the original loan issue balance Loss Contingencies, Percentage of the Original Loan Issue Balance Loss Contingencies, Percentage of the Original Loan Issue Balance Number of buyers of Previously purchased limited documentation loans with settlements Loss Contingencies, Settlement, Number of Buyers of Previously Purchased Limited Documentation Loans Represents the number of buyers of previously purchased limited documentation loans with whom settlement negotiations are entered by the entity. Estimated range of remaining possible losses due to loan losses Loss Contingency, Estimate of Possible Loss Loan loss reserve, at carrying value Loss Contingency Accrual Number of investors to whom loans are guaranteed Guarantee Obligations, Number of Investors to whom Loans Guaranteed Represents the number of investors to whom loans are guaranteed by the entity. Activity related to loss reserves on previously sold loans Loss Contingency Accrual [Roll Forward] Loan loss reserve, beginning of period Provisions Loss Contingency Accrual, Provision Charge-offs to reserves Loss Contingency, Accrual Carrying Value, Charge Offs The charge-offs made in the period which reduced loss contingency liabilities. Loan loss reserve, end of period Schedule of Effect of New Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] BUSINESS ACQUISITION Business Combination Disclosure [Text Block] CONTINGENCIES Legal Matters and Contingencies [Text Block] Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Number of Reportable Segments Number of Reportable Segments Income Statement [Abstract] Costs and expenses: Costs and Expenses [Abstract] Cost of revenue (exclusive of depreciation and amortization shown separately below) Cost of Revenue Selling and marketing expense Selling and Marketing Expense General and administrative expense General and Administrative Expense Product development Research and Development Expense Severance Severance Costs Litigation settlements and contingencies Litigation Settlement, Expense Total costs and expenses Costs and Expenses Operating income Operating Income (Loss) Other income (expense): Other Nonoperating Income (Expense) [Abstract] Interest expense, net Interest Income (Expense), Net Other (expense) income Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax benefit Income Tax Expense (Benefit) Net income from continuing operations Loss from discontinued operations, net of tax Net income and comprehensive income Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Diluted Income per share from continuing operations: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Loss per share from discontinued operations: Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] Basic (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Diluted (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net income per share: Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted DEBT Debt Disclosure [Text Block] Statement of Financial Position [Abstract] Accounts receivable, allowance (in dollars) Allowance for Doubtful Accounts Receivable, Current Accumulated depreciation of property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized shares Preferred Stock, Shares Authorized Preferred stock, issued shares Preferred Stock, Shares Issued Preferred stock, outstanding shares Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized shares Common Stock, Shares Authorized Common stock, issued shares Common Stock, Shares, Issued Common stock, outstanding shares Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chairman And Chief Executive Officer [Member] Chairman And Chief Executive Officer [Member] Chairman And Chief Executive Officer [Member] Performance Shares Performance Shares [Member] Performance options Performance Options [Member] Performance Options Target grant date value of performance based equity compensation Target Grant Date Value of Performance Based Equity Compensation Target Grant Date Value of Performance Based Equity Compensation Percentage, Target grant date value of performance based equity compensation, Restricted stock awards Percentage, Target Grant Date Value of Performance Based Equity Compensation, Restricted Stock Awards Percentage, Target Grant Date Value of Performance Based Equity Compensation, Restricted Stock Awards Percentage, Target grant date value of performance based equity compensation, Nonqualified stock options Percentage, Target Grant Date Value of Performance Based Equity Compensation, Nonqualified Stock Options Percentage, Target Grant Date Value of Performance Based Equity Compensation, Nonqualified Stock Options Maximum potential future issuance of performance based equity compensation, Nonqualified stock options Maximum Potential Future Issuance of Performance Stock Options Maximum Potential Future Issuance of Performance Stock Options Targeted total shareholder return performance, Nonqualified stock options Targeted Total Shareholder Return Performance, Nonqualified Stock Options Targeted Total Shareholder Return Performance, Nonqualified Stock Options Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Annaul grant limit per employee (in shares) Annaul Grant Limit Per Employee, Shares Annaul Grant Limit Per Employee, Shares Performance awards earned Performance Awards Earned Performance Awards Earned Stock options, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Outstanding at the end of the period (in shares) Options exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock options, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Outstanding at the end of the period (in dollars per share) 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 Stock options, 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. -- Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Stock options, Aggregate Intrinsic Value Share Based Compensation Arrangement by Share Based Payment Award, Options, Aggregate Intrinsic Value [Abstract] -- None. No documentation exists for this element. -- Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Stock options, Grant Date Fair Value Valuation Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Expected term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Simplified Method Expected dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Expected dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments Schedule of changes in assets and liabilities that are measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Balances without adoption of ASC Topic 606 Calculated under Revenue Guidance in Effect before Topic 606 [Member] Adjustments due to ASC Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Prepaid and other current assets Prepaid Expense and Other Assets, Current Deferred income tax assets Deferred Tax Assets, Net, Noncurrent Accumulated deficit Retained Earnings (Accumulated Deficit) Income Statement Related Disclosures [Abstract] Income Statement Related Disclosures [Abstract] Schedule of mortgage and non-mortgage product revenue Schedule of Segment Reporting Information, by Segment [Table Text Block] Payables and Accruals [Abstract] Schedule of accrued expenses and other current liabilities Schedule of Accrued Liabilities [Table Text Block] DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Charitable Contribution Accrual Charitable Contribution Accrual Charitable Contribution Accrual Accrued expenses and other current liabilities Accrued Liabilities, Current [Abstract] Accrued advertising expense Accrued Advertising, Current Accrued compensation and benefits Employee-related Liabilities, Current Accrued professional fees Accrued Professional Fees, Current Customer deposits and escrows Customer Deposits, Current Other Other Liabilities, Current Total accrued expenses and other current liabilities Accrued Liabilities, Current Effective tax rates (as a percent) Effective Income Tax Rate Reconciliation, Percent Federal statutory income tax rate (as a percentage) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Income tax expense - excluding excess tax benefit on stock compensation Income Tax Expense Excluding Excess Tax Benefit on Stock Compensation Income Tax Expense Excluding Excess Tax Benefit on Stock Compensation Excess tax benefits recognized in income tax expense Proceeds and Excess Tax Benefit from Share-based Compensation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] 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] Balance at December 31, 2017 Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Contingent consideration additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Contingent consideration payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Balance at March 31, 2018 Goodwill Goodwill, Gross Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Net goodwill Goodwill Intangible assets with indefinite lives Indefinite-Lived Intangible Assets (Excluding Goodwill) Intangible assets with definite lives, net Total intangible assets, net Intangible Assets, Net (Excluding Goodwill) Document and Entity Information -- None. No documentation exists for this element. -- Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entity Information: Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Discover DISCONTINUED OPERATIONS Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Asset purchase agreement proceeds from sale Asset Purchase Agreement Proceeds From Sale Represents the proceeds for sale of the assets under the purchase agreement entered into by the reporting entity. Revenue and net income (loss) of discontinued operations Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Revenue Disposal Group, Including Discontinued Operation, Revenue Loss before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Loss from discontinued operations Assets and liabilities of facilities reported as discontinued operations Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] Non-current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Noncurrent Current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current Vested (in shares) Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] 50% over a period of two years from the grant date [Member] 50% over a period of two years from the grant date [Member] 50% over a period of two years from the grant date [Member] 33% over a period of three years from the grant date [Member] 33% over a period of three years from the grant date [Member] 33% over a period of three years from the grant date [Member] 25% over a period of four years from the grant date [Member] 25% over a period of four years from the grant date [Member] 25% over a period of four years from the grant date [Member] Aggregate stock options Stock Compensation Plan [Member] Employee stock option 2 Employee Stock Option 2 [Member] Employee Stock Option 2 [Member] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Grant date fair value Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Comprehensive Income (Loss) Comprehensive Income [Member] Noncontrolling interest Noncontrolling Interest [Member] Statement Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Stockholders' Equity Attributable to Parent Balance (in shares) Shares, Issued Net income and comprehensive income Non-cash compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Cumulative effect adjustment due to ASU 2014-09 New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Balance Balance (in shares) STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] ASSETS: Assets [Abstract] Accounts receivable (net of allowance of $714 and $675, respectively) Accounts Receivable, Net, Current Current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Current Total current assets Assets, Current Property and equipment (net of accumulated depreciation of $12,901 and $13,043, respectively) Property, Plant and Equipment, Net Goodwill Intangible assets, net Other non-current assets Other Assets, Noncurrent Total assets Assets LIABILITIES: Liabilities [Abstract] Accounts payable, trade Accounts Payable, Trade, Current Accrued expenses and other current liabilities Current liabilities of discontinued operations Total current liabilities Liabilities, Current Other non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies SHAREHOLDERS' EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock $.01 par value; 5,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Common stock $.01 par value; 50,000,000 shares authorized; 14,691,595 and 14,218,572 shares issued, respectively, and 12,422,041 and 11,979,434 shares outstanding, respectively Common Stock, Value, Outstanding Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock; 2,269,554 and 2,239,138 shares, respectively Treasury Stock, Value Noncontrolling interest Noncontrolling Interest in Variable Interest Entity Total shareholders' equity Total liabilities and shareholders' equity Liabilities and Equity Schedule of revenue and net income (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 Schedule of the number of loans sold and the original issue balance Schedule of the Number and Issue Balance of Loans Sold and Subsequent Settlements [Table Text Block] Schedule of the Number and Issue Balance of Loans Sold and Subsequent Settlements [Table Text Block] Schedule of activity related to loss reserves on previously sold loans Schedule of Activity in Loss Reserves on Loans Sold [Table Text Block] Tabular disclosure of activity related to loss reserves on previously sold loans. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] INCOME TAXES Income Tax Disclosure [Text Block] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Schedule of non-cash compensation expense related to equity awards Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of changes in outstanding stock options Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option valuation assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of changes in outstanding non-vested RSUs and restricted stock Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of changes in outstanding nonvested RSUs with performance conditions Schedule of Nonvested Performance-based Units Activity [Table Text Block] Schedule of changes in outstanding stock options with market conditions Schedule of Nonvested Performance Based Stock Options [Table Text Block] Schedule of Nonvested Performance Based Stock Options [Table Text Block] Amortization of intangible assets with definite lives computed on a straight-line basis Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Remainder of current year Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Line of Credit Facility [Table] Line of Credit Facility [Table] Federal Funds Effective Swap Rate [Member] Federal Funds Effective Swap Rate [Member] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Base Rate [Member] Base Rate [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Swingline Facility [Member] Swingline Facility [Member] Swingline Facility [Member] Letters of Credit [Member] Letters of Credit [Member] Letters of Credit [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Revolving Credit Facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Revolving Credit Facility, term Debt Instrument, Term Revolving Credit Facility, conditional increase to borrowing capacity Line of Credit Facility, Conditional Increase to Borrowing Capacity Line of Credit Facility, Conditional Increase to Borrowing Capacity Ratio of Debt to EBITDA to Increase Revolving Commitment Ratio of Debt to EBITDA to Increase Revolving Commitment Ratio of Debt to EBITDA to Increase Revolving Commitment Revolving Credit Facility, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Revolving Credit Facility, collateral, percent of assets Line of Credit Facility, Collateral, Percent of Assets Line of Credit Facility, Collateral, Percent of Assets Revolving Credit Facility, collateral, percent of equity Line of Credit Facility, Collateral, Percent of Equity Line of Credit Facility, Collateral, Percent of Equity Revolving Credit Facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 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 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 Fees and expense paid to lenders at closing Debt Instrument, Fee Amount Ratio of Debt to EBITDA Ratio of Debt to EBITDA Ratio of Debt to EBITDA Ratio of Debt to EBITDA Step-Down Ratio of Debt to EBITDA Step-Down Ratio of Debt to EBITDA Step-Down Ratio of Debt to EBITDA Increase Ratio of Debt to EBITDA Increase Ratio of Debt to EBITDA Increase Line of Credit Facility, Collateral, 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 Line of Credit Facility, Collateral, Percent of Voting Equity Line of Credit Facility, Collateral, Percent of Voting Equity Line of Credit Facility, Collateral, Percent of Voting Equity Line of Credit Facility, Collateral, 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 Schedule of balance of goodwill and intangible assets, net Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of intangible assets with definite lives Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of amortization of intangible assets with definite lives for the next five years Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash in escrow for sale of LendingTree Loans Escrow Deposit for Sale of LTL [Member] Represents the restricted cash in escrow deposit for sale of LTL. Other Restricted Cash and Cash Equivalents Other Restricted Cash and Cash Equivalents [Member] Represents the restricted cash and cash equivalent that are not separately disclosed elsewhere in the taxonomy. Restricted Cash and Cash Equivalents Restricted Cash and Cash Equivalents Items [Line Items] Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period SHAREHOLDERS' EQUITY Earnings Per Share [Text Block] RESTRICTED CASH Restricted Assets Disclosure [Text Block]