Business Combinations [Abstract] Schedule of assets acquired and liabilities assumed in a business acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Unauidted pro form revenue and net income from continuing operations of business acquisition Business Acquisition, Pro Forma Information [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Payables and Accruals [Abstract] Accrued expenses and other current liabilities Accrued Liabilities, Current [Abstract] Accrued litigation liability Estimated Litigation Liability 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 ORGANIZATION -- None. No documentation exists for this element. -- ORGANIZATION Business Description and Basis of Presentation [Text Block] 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] Discontinued Operations and Disposal Groups [Abstract] DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, 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 Schedule of 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] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] 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. Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Discover Discover Bank [Member] Represents Discover Bank, a wholly owned subsidiary of Discover Financial Services. DISCONTINUED OPERATIONS Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value 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. 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. 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 Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent 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 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 Earnings Per Share [Abstract] Schedule of computation of weighted average basic and diluted shares WeightedAverageShareDisclosureTable [Table Text Block] WeightedAverageShareDisclosureTable [Table Text Block] Cash and Cash Equivalents [Abstract] RESTRICTED CASH Restricted Assets Disclosure [Text Block] 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 Finite-Lived Intangible Assets, Net Total intangible assets, net Intangible Assets, Net (Excluding Goodwill) Debt Disclosure [Abstract] REVOLVING CREDIT FACILITY Debt Disclosure [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] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Performance Shares [Member] Performance Shares [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] STOCK-BASED COMPENSATION Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 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 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 Nonvested at the end of the period (in dollars per share) Fair Value Disclosures [Abstract] Fair Value Disclosures Fair Value Disclosures [Text Block] Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Discontinued Operations, Disposed of by Sale [Member] Discontinued Operations, Disposed of by Sale [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [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] Lending Tree v. Zillow, Inc. Lending Tree v. Zillow, Inc. [Member] Lending Tree v. Zillow, Inc. [Member] Next Advisor Next Advisor [Member] [Domain] Next Advisor [Member] Massachusetts Division of Banks Massachusetts Division of Banks [Member] Massachusetts Division of Banks Lehman Brothers Holdings, Inc. Demand Letter Lehman Brothers Holdings, Inc. Demand Letter [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Unfavorable regulatory action Unfavorable Regulatory Action [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Contingencies Loss Contingencies [Line Items] Number of patents found not infringed upon Loss Contingency, Number of Patents Found Not Infringed Upon Loss Contingency, Number of Patents Found Not Infringed Upon Litigation loss Litigation Settlement, Amount Number of patents alleged infringement upon, maximum Number of Patents Alleged Infringed Upon, Maximum Number of Patents Alleged Infringed Upon, Maximum Number of Joining Regulators Number of Joining Regulators This element represents the number of state mortgage regulation divisions that agree to not pursue litigation as part of an agreement for the company to sign a Consent Agreement and Order. Estimated range of remaining possible losses due to loan losses Loss Contingency, Estimate of Possible Loss Line of Credit Facility [Table] Line of Credit Facility [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] 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 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 RSUs Restricted Stock Units (RSUs) [Member] Restricted stock Restricted Stock [Member] 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 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 Schedule of Restricted Cash and Cash Equivalents Schedule of Restricted Cash and Cash Equivalents [Table 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 Accounting Policies [Abstract] Excess tax benefits recognized in income tax expense Proceeds and Excess Tax Benefit from Share-based Compensation Prior period cash flow presentation for excess tax benefits New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustment to Cash Flow Presentation Retrospective adoption for the change in presentation in the statement of cash flows for excess tax benefits from a financing activity to an operating activity. Cumulative-effect adjustment to retained earnings for the recognition of forfeitures of stock awards New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Aggregate stock options Stock Compensation Plan [Member] Employee stock options Employee Stock Option [Member] Director stock options Director Stock Option [Member] An arrangement whereby a director of the board is entitled to receive, in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Although there are variations, normally, after vesting, when an option is exercised, the director-holder pays the strike value in cash to the issuing employer-entity and receives equity shares. The equity shares can be sold into the market for cash at the current market price without restriction. Options may be used to attract, retain and incentivize directors, in addition to their regular salary and other benefits. Share Price Share Price 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 Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 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 Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, 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 dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments Expected dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 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 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 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] 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] SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [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] 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] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Discover Bank Loan loss obligations Obligation to Repurchase Receivables Sold [Member] Statement, Operating Activities Segment [Axis] Operating Activities [Axis] Segment, Operating Activities [Domain] Operating Activities [Domain] Discontinued operations Discontinued Operations [Member] Period of Loan Sales [Axis] Period of Loan Sales [Axis] Information related to loan sales, by period. Period of Loan Sales [Domain] Period of Loan Sales [Domain] Details pertaining to loan sales, by period. Loan Loss Obligations Restricted cash and cash equivalents Restricted Cash and Cash Equivalents, Current Increase (Decrease) in Restricted Cash Increase (Decrease) in Restricted Cash Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents, Period Increase (Decrease) 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. 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. 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 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. Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] 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 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. Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Bad debt expense Provision for Doubtful Accounts Amortization of debt issuance costs Amortization of Debt Issuance Costs 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 payable 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 Decrease in restricted cash Net cash (used in) provided by 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] Payments related to net-share settlement of stock-based compensation, net of proceeds from exercise of stock options Payments Related to Tax Withholding for Share-based Compensation Proceeds from equity offering Proceeds from equity offering, financing activities Proceeds from equity offering, financing activities Payment of equity offering costs Payment of equity offering costs, financing activities Payment of equity offering costs, financing activities 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 provided by (used in) 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 increase (decrease) in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period 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 Weighted average common shares, diluted Weighted Average Number of Shares Outstanding, Diluted Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 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 BUSINESS ACQUISITION Business Combination Disclosure [Text Block] 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] 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 Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Mortgage Products [Member] Mortgage Products [Member] Mortgage Products [Member] Non-mortgage Products [Member] Non-mortgage Products [Member] Non-mortgage Products [Member] Segment Information Segment Reporting Information [Line Items] Revenue Revenues Schedule of Restricted Cash and Cash Equivalents [Table] Schedule of Restricted Cash and Cash Equivalents [Table] 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] Decrease in restricted cash 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 $1,215 and $1,059, respectively) Accounts Receivable, Net, Current Prepaid and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment (net of accumulated depreciation of $11,050 and $9,739, respectively) Property, Plant and Equipment, Net Goodwill Intangible assets, net Deferred income tax assets Deferred Tax Assets, Net, Noncurrent 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 contingent consideration Business Combination, Contingent Consideration, Liability, Current Current liabilities of discontinued operations Total current liabilities Liabilities, Current Non-current contingent consideration Business Combination, Contingent Consideration, Liability, Noncurrent 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; 14,067,306 and 13,955,378 shares issued, respectively, and 11,903,561 and 11,791,633 shares outstanding, respectively Common Stock, Value, Outstanding Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Treasury stock 2,163,745 and 2,163,745 shares, respectively Treasury Stock, Value Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity 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) income Interest Income (Expense), Net Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax benefit (expense) Income Tax Expense (Benefit) Loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations Net of Applicable Taxes This extension captures Income (loss) from operations of 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, Net of Tax, Per Basic and Diluted Share [Abstract] -- None. No documentation exists for this element. -- 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 Income per share attributable to common shareholders: Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Schedule of mortgage and non-mortgage product revenue Schedule of Segment Reporting Information, by Segment [Table Text Block] 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] Trademarks and tradenames Trademarks and Trade Names [Member] Tenant leases Leases, Acquired-in-Place [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 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Contingent consideration on acquisition date Business Combination, Contingent Consideration, Liability 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, 2016 Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Balance at March 31, 2017 CONTINGENCIES Legal Matters and Contingencies [Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Iron Horse Holdings, LLC [Member] Iron Horse Holdings, LLC [Member] Iron Horse Holdings, LLC [Member] Earnout Payment for One Contingent Earnout [Member] Earnout Payment for One Contingent Earnout [Member] Earnout Payment for One Contingent Earnout [Member] Business Acquisition Business Acquisition [Line Items] Initial cash consideration to acquire business Payments to Acquire Businesses, Gross 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 Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Iintangible assets with definite lives, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Accounts payable and accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Acquisition-related costs Business Combination, Acquisition Related Costs 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 Schedule of accrued expenses and other current liabilities Schedule of Accrued Liabilities [Table Text Block] 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 SHAREHOLDERS' EQUITY Earnings Per Share [Text Block] 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] Statement Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance 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 Issue During Period of Stock Option and Restricted Stock Net Value of Units This element represent Issuance of common stock values upon exercise of stock options and vesting of restricted stock units net of withholding taxes. Issuance of common stock for stock options, restricted stock awards and restricted stock units, net of withholding taxes (in shares) Stock Issue During Period of Stock Option and Restricted Stock Net Shares of Units This element represent Issuance of common stock shares upon exercise of stock options and vesting of restricted stock units net of withholding taxes. Cumulative effect adjustment due to ASU 2016-09 New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Balance Balance (in shares) 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 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five INCOME TAXES Income Tax Disclosure [Text Block]