Document and Entity Information -- None. No documentation exists for this element. -- Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] RSUs Restricted Stock Units (RSUs) [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Two Key Employees [Member] Two Key Employees [Member] Two Key Employees [Member] Third Key Employee [Member] Third Key Employee [Member] Third Key Employee [Member] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Earnout Payment for One Contingent Earnout [Member] 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] QuoteWizard [Member] QuoteWizard [Member] QuoteWizard [Member] Student Loan Hero [Member] Student Loan Hero [Member] Student Loan Hero [Member] Ovation [Member] Ovation [Member] Ovation Credit Services SnapCap [Member] SnapCap [Member] SnapCap MagnifyMoney [Member] MagnifyMoney [Member] MagnifyMoney [Member] DepositAccounts [Member] DepositAccounts [Member] DepositAccounts [Member] CompareCards [Member] CompareCards [Member] CompareCards [Member] SimpleTuition [Domain] SimpleTuition [Domain] SimpleTuition [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Severance Costs Severance Costs Acquisition purchase consideration Payments to Acquire Businesses, Gross Business Combination, Consideration Transferred, Cash On Hand Business Combination, Consideration Transferred, Cash On Hand Business Combination, Consideration Transferred, Cash On Hand Proceeds from revolving credit facility Proceeds from Long-term Lines of Credit Business Combination, Number Of Payments Business Combination, Number Of Payments Business Combination, Number Of Payments Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Number of contingent consideration payments Number Of Contingent Consideration Payments Number Of Contingent Consideration 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 Total purchase price Business Combination, Consideration Transferred Contingent consideration on acquisition date Business Combination, Contingent Consideration, Liability Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital Contingent consideration payments Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Operating Activities Payment for Contingent Consideration Liability, Operating Activities Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Goodwill Goodwill Acquisition-related costs Business Combination, Acquisition Related Costs Option to acquire a foreign affiliate Option to Acquire a Foreign Affiliate Option to Acquire a Foreign Affiliate Option to acquire a foreign affiliate, window Option To Acquire A Foreign Affiliate, Window Option To Acquire A Foreign Affiliate, Window Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock granted, net of forfeitures Stock Granted, Value, Share-based Compensation, Net of Forfeitures Number of reportable segments Number of Reportable Segments 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 Business Combination, Contingent Consideration, Individual Payments Based on Specified Increases in Federal Funds Interest Rates Contingent consideration, one-time performance payment Business Combination, Contingent Consideration, One-Time Performance Payment Business Combination, Contingent Consideration, One-Time Performance Payment Payment for contingent consideration liability, investing activities Payment for Contingent Consideration Liability, Investing Activities Current contingent consideration Business Combination, Contingent Consideration, Liability, Current Contingent considerations Business Combination, Contingent Consideration, Liability, Noncurrent Current contingent consideration Contingent Consideration Payment Contingent Consideration Payment Contingent consideration arrangements, after tax contingent consideration expense Business Combination, Contingent Consideration Arrangements, After Tax Contingent Consideration Expense After tax contingent consideration expense. Revenue of acquirees since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Earnings of acquiree since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Value of award Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Accounting Policies [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building Building and Building Improvements [Member] Site improvements Land Improvements [Member] Computer equipment and capitalized software Computer Equipment and Capitalized Software [Member] Represents the computer equipment and capitalized software held by the entity for its use in production of products and services in which the entity deals, and are subject to depreciation, depletion and amortization. Furniture and other equipment Furniture and Fixtures [Member] Software development Software Development [Member] Aircraft and automobile Automobiles [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property and Equipment Property, Plant and Equipment [Line Items] Depreciation period Property, Plant and Equipment, Useful Life Advertising Marketing and Advertising Expense [Abstract] Advertising Expense Advertising Expense Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09 Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Comprehensive Income Comprehensive Income [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Noncontrolling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] 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 Net Income (Loss) Available to Common Stockholders, Basic 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 Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired 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 Tax benefit from stock-based award activity Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Cumulative effect adjustment New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Issuance of 0.625% Convertible Senior Notes, net Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Convertible note hedge Adjustments to Additional Paid in Capital, Entry into Convertible Note Hedge Transactions Adjustments to Additional Paid in Capital, Entry into Convertible Note Hedge Transactions Sale of warrants Adjustments to Additional Paid in Capital, Warrant Issued Noncontrolling interest (Note 8) Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Interest rate Debt Instrument, Interest Rate, Effective Percentage Acquisition of noncontrolling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Balance Balance (in shares) Payables and Accruals [Abstract] 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 Contribution to LendingTree Foundation, Current Charitable Contribution Accrual, Current Charitable Contribution Accrual, Current Other Other Liabilities, Current Total accrued expenses and other current liabilities Accrued Liabilities, Current Contribution to LendingTree Foundation, Total Charitable Contribution Accrual Charitable Contribution Accrual Earnings Per Share [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Employee Stock Option [Member] Employee Stock Option [Member] Calculation of Weighted Average Common Shares Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average shares outstanding: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Weighted average basic common shares (in shares) Weighted Average Number of Shares Outstanding, Basic 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 and warrants Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Weighted average diluted common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Additional disclosure Earnings Per Share, Diluted, Other Disclosures [Abstract] Anti-dilutive securities excluded from calculation of diluted earnings per share 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) Value of treasury stock acquired Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] 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] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue Revenues Contract Asset Contract with Customer, Asset, Net Contract Liability Contract with Customer, Liability, Current Revenue recognized from prior period Contract with Customer, Liability, Revenue Recognized Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Attorney Fees [Member] Attorney Fees [Member] Attorney Fees [Member] Pre-Judgment Interest [Member] Pre-Judgment Interest [Member] Pre-Judgment Interest [Member] Minimum [Member] Maximum [Member] 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] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending litigation or appeal Pending Litigation [Member] Judicial Ruling [Member] Judicial Ruling [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Residential Funding Co. v Home Loan Center [Member] Residential Funding Co. v Home Loan Center [Member] Residential Funding Co. v Home Loan Center [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Lehman Brothers Holdings, Inc. Demand Letter [Member] Contingencies Loss Contingencies [Line Items] Accrued litigation liabilities Estimated Litigation Liability Range of possible loss, minimum Loss Contingency, Estimate of Possible Loss Number of Loan Originators Number of Loan Originators Number of loan originators from whom Residential Funding Company had purchased loans. Loss Contingency, Pending Claims, Number Loss Contingency, Pending Claims, Number Loss Contingency, Damages Sought Loss Contingency, Damages Sought Litigation Settlement, Amount Awarded to Other Party Litigation Settlement, Amount Awarded to Other Party Loss Contingency, Damages Sought, Value Loss Contingency, Damages Sought, Value Loss Contingency, Number of Defendants Loss Contingency, Number of Defendants Loss Contingencies, Number of Loans Sold with Losses Loss Contingencies, Number of Loans Sold with Losses Represents the number of loans sold with losses by the entity. Other Commitments [Table] Other Commitments [Table] Other Commitments [Line Items] Other Commitments [Line Items] Other Commitment Other Commitment Cash and Cash Equivalents [Abstract] CASH AND RESTRICTED CASH Restricted Assets Disclosure [Text Block] Discontinued Operations and Disposal Groups [Abstract] ASSETS HELD FOR SALE Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Revenue Revenue from Contract with Customer [Text Block] Fair Value Disclosures [Abstract] 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] Beginning balance 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 Ending balance LendingTree Loans [Abstract] LendingTree Loans [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [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] Residential Funding Company [Domain] Residential Funding Company [Domain] Residential Funding Company [Domain] Statement, Operating Activities Segment [Axis] Operating Activities [Axis] Segment, Operating Activities [Domain] Operating Activities [Domain] Discontinued operations Discontinued Operations [Member] Loan loss obligations Obligation to Repurchase Receivables Sold [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. 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. Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] (Recoveries) provisions Loss Contingency Accrual, Provision 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. Payment for settlement with buyers of previously purchased loans Loss Contingency, Settlement Value Represents the amount of payment made by the entity towards the settlement with the buyers of previously purchased loans. Guarantee Obligations, Number of Investors to whom Loans Guaranteed Guarantee Obligations, Number of Investors to whom Loans Guaranteed Represents the number of investors to whom loans are guaranteed by the entity. Loss Contingencies, 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 Loss Contingencies, 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 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. Loss Contingency, Estimate of Possible Loss Amount of reserve for contingencies Loss Contingency Accrual Goodwill and Intangible Assets Disclosure [Abstract] Goodwill rollforward Schedule of Goodwill [Table Text Block] Schedule of balance of 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] CONTINGENCIES Legal Matters and Contingencies [Text Block] Defined Contribution Plan [Abstract] BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Increase to goodwill due to acquisitions Goodwill, Period Increase (Decrease) Impairment losses during period related to goodwill Goodwill, Impairment Loss Balance of goodwill and intangible assets, net Intangible Assets, Net (Including Goodwill) [Abstract] Goodwill Goodwill, Gross Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Net 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) Impairment charges related to trade names and trademarks Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) FAIR VALUE MEASUREMENT Fair Value Disclosures [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] ValuePenguin [Member] ValuePenguin [Member] ValuePenguin [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Proceeds from sale of property held-for-sale Proceeds from Sale of Property Held-for-sale Earnest money deposit Earnest Money Deposits Property, Plant and Equipment [Abstract] Schedule of property and equipment, net Schedule of Property, Plant and Equipment Components [Table Text Block] Tabular disclosure of the components of property, plant and equipment. 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] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Income tax benefit (expense) Income Tax Expense (Benefit) Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent 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) Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] 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 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 Depreciation Depreciation, Depletion and Amortization Amortization of intangibles Amortization of Intangible Assets Severance Restructuring Charges Litigation settlements and contingencies Litigation Settlement, Expense Total costs and expenses Costs and Expenses Operating income Operating Income (Loss) Other (expense) income, net: Other Nonoperating Income (Expense) [Abstract] Interest expense, net Interest Expense Other (expense) income Other Income Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax benefit (expense) Net income from continuing operations Loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Weighted average diluted common shares (in shares) 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 Net income per share: Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Convertible Notes Payable [Member] Convertible Notes Payable [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-term Debt, Weighted Average Interest Rate, at Point in Time Convertible Debt Convertible Debt 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 Debt Conversion, Number of Shares of Common Stock Convertible per $1,000 of Principal Notes Convertible Preferred Stock, Terms of Conversion Convertible Preferred Stock, Terms of Conversion Debt Instrument, Convertible, Conversion Price Debt Instrument, Convertible, Conversion Price Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt Instrument, Redemption Price, 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 Convertible Debt, Noncurrent Convertible Debt, Noncurrent Debt Instrument, Convertible, Carrying Amount of Equity Component Debt Instrument, Convertible, Carrying Amount of Equity Component Interest Expense, Debt Interest Expense, Debt Interest Expense, Debt, Excluding Amortization Interest Expense, Debt, Excluding Amortization Amortization of convertible debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs Amortization of Debt Issuance Costs Debt Issuance Costs, Gross Debt Issuance Costs, Gross Debt issuance costs, equity component Debt issuance costs, equity component Debt issuance costs, equity component Long-term Debt, Fair Value Long-term Debt, Fair Value Debt Issuance Costs, Net [Abstract] Debt Issuance Costs, Net [Abstract] Gross carrying amount Unamortized debt discount Debt Instrument, Unamortized Discount Debt issuance costs Debt issuance costs, liability component Debt issuance costs, liability component Net carrying amount Long-term Debt, Excluding Current Maturities Related Party Transactions [Abstract] Number Of Board Of Directors Also Serving As Director To Marketing Partner Of The Company Number Of Board Of Directors Also Serving As Director To Marketing Partner Of The Company Number Of Board Of Directors Also Serving As Director To Marketing Partner Of The Company Expenses incurred for related parties Related Party Transaction, Amounts of Transaction Charitable Contribution, Total Charitable Contribution Charitable Contribution Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenues Sales Revenue, Services, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer concentration Customer Concentration Risk [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Customer one Customer One [Member] Represents details related to customer one. Customer two Customer Two [Member] Represents details related to customer two. Certain Risks and Concentrations Concentration Risk [Line Items] Number of major customers Number of Major Customers Represents the number of major customers of the entity. Concentration risk (as a percent) Concentration Risk, Percentage 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 Technology-Based Intangible Assets [Member] Customer lists Customer Lists [Member] Website content Media Content [Member] Trademarks and trade names Trademarks and Trade Names [Member] Fair Value Finite-lived Intangible Assets Acquired Weighted Average Amortization Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Rental Income, Nonoperating Rental Income, Nonoperating 2019 Operating Leases, Future Minimum Payments Receivable, Current 2020 Operating Leases, Future Minimum Payments Receivable, in Two Years 2021 Operating Leases, Future Minimum Payments Receivable, in Three Years 2022 Operating Leases, Future Minimum Payments Receivable, in Four Years 2023 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Operating Leases, Payments Receivable Operating Leases, Future Minimum Payments Receivable Long-term Debt [Text Block] Long-term Debt [Text Block] Net proceeds from the Convertible Notes used to pay for the cost of the Convertible Note Hedge Net proceeds from the Convertible Notes used to pay for the cost of the Convertible Note Hedge Net proceeds from the Convertible Notes used to pay for the cost of the Convertible Note Hedge Payments for Hedge, Financing Activities 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 Class of Warrant or Right, Exercise Price of Warrants or Rights 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 PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Income Tax Disclosure [Abstract] Deferred income tax assets Deferred Tax Assets, Net of Valuation Allowance Non-current assets of discontinued operations Deferred Tax Asset, Parent's Basis in Discontinued Operation Deferred Tax Liabilities, Net, Noncurrent Deferred Tax Liabilities, Net, Noncurrent Net deferred taxes Aggregate Deferred Tax Liabilities Net of Assets and Net of Valuation Allowance Represents aggregate deferred tax liabilities, net of deferred tax assets and net of valuation allowance. Schedule of Debt [Table Text Block] Schedule of Debt [Table Text Block] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [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] COMMITMENTS Commitments Disclosure [Text Block] Two Office Buildings In Charlotte, NC Two Office Buildings In Charlotte, NC [Member] Two Office Buildings In Charlotte, NC [Member] Weighted Average Weighted Average [Member] Property, Plant and Equipment [Line Items] Number Of Office Buildings Acquired Number Of Office Buildings Acquired Number Of Office Buildings Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Land Improvements Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Land Improvements Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Land Improvements Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Leases Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Leases Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Leases Weighted Average Amortization Life Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Acquisition Costs, Period Cost Acquisition Costs, Period Cost 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 from sale of LendingTree Loans Escrow Deposit for Sale of LTL [Member] Represents the restricted cash in escrow deposit for sale of LTL. Other 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 Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash and cash equivalents Restricted Cash and Cash Equivalents, Current Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Schedule of mortgage and non-mortgage product revenue Schedule of Segment Reporting Information, by Segment [Table Text Block] Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Balance, beginning of the period Allowance for Doubtful Accounts Receivable Charges to earnings Provision for Doubtful Accounts Write off of uncollectible accounts receivable Allowance for Doubtful Accounts Receivable, Write-offs Balance, end of the period DISCONTINUED OPERATIONS Revenue and net income (loss) of discontinued operations Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Revenue Disposal Group, Including Discontinued Operation, Revenue Income (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 Maximum contribution by employees as a percentage of pre-tax earnings Defined Contribution Plan Employee Contribution Limit Percentage of Compensation The limit of annual employee contributions to the plan per calendar year as a percentage of compensation. Generally the maximum amount a participant may contribute in accordance with statutory limits Defined Contribution Plan Employee Contributions of Pretax Base Salary Approximate Statutory Limit Generally, the maximum amount an employee may contribute to a defined contribution plan for the calendar year in accordance with statutory limits. Defined Contribution Plan Employer Matching Contribution Per Participant Dollar Contributed Defined Contribution Plan Employer Matching Contribution Per Participant Dollar Contributed Represents maximum amount by the terms of the plan, that the employer may contribute for each dollar to a defined contribution plan. Maximum contribution by employer (as a percent) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Requisite service period for matching contribution Defined Contribution Plan Requisite Service Period for Employer Matching Contribution The requisite service period for eligibility for matching contribution by the employer. Vesting of employer matching contribution prior to requisite service period (as a percent) Defined Contribution Plan Vesting of Employer Match Prior to Requisite Service Period Represents the vesting of employer matched funds, expressed as a percentage, prior to the requisite service period. Vesting of employer matching contribution after requisite service period (as a percent) Defined Contribution Plan Vesting of Employer Match after Requisite Service Period Represents the vesting of employer matched funds, expressed as a percentage, after the requisite service period. Matching contribution made by the entity Defined Contribution Plan, Cost Subsequent Events [Text Block] Subsequent Events [Text Block] Components of the income tax provision (benefit) Income Tax Expense (Benefit), Continuing Operations [Abstract] Current income tax expense: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Current income tax expense Current Income Tax Expense (Benefit) Deferred income tax (benefit) provision: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Deferred income tax (benefit) provision Deferred Income Tax Expense (Benefit) Income tax expense (benefit) Schedule of components of the income tax provision (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of reconciliation of total income tax provision to amounts computed by applying statutory federal income tax rate to income (loss) from continuing operations before income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of components of the deferred tax assets and deferred tax liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of the deferred tax valuation allowance reconciliation Summary of Valuation Allowance [Table Text Block] Schedule of reconciliation of beginning and ending amounts of unrecognized tax benefits, excluding interest and penalties Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [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] Year ending December 31, 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Year ending December 31, 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two Year ending December 31, 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three Year ending December 31, 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four Year ending December 31, 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Net Quarterly Financial Information [Abstract] Quarterly Financial Information [Abstract] QUARTERLY FINANCIAL INFORMATION (UNAUDITED) Quarterly Financial Information [Text Block] SHAREHOLDERS' EQUITY Earnings Per Share [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] Performance Shares [Member] Performance Shares [Member] Restricted Stock Restricted Stock [Member] STOCK-BASED COMPENSATION Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average period for recognition of unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Nonvested RSUs and RSAs, 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 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 and RSAs, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] 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) Fair value of RSUs and RSAs that vested during the year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Award Vesting Rights, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Operating income (loss) Loss from discontinued operations Net income (loss) and comprehensive income (loss) Income (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) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share Diluted (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Provisional estimate for remeasurement of deferred tax assets and liabilities from Tax Cuts and Jobs Act Provisional estimate for remeasurement of deferred tax assets and liabilities from Tax Cuts and Jobs Act Provisional estimate for remeasurement of deferred tax assets and liabilities from Tax Cuts and Jobs Act Reconciliation of unrecognized tax benefits, excluding interest Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance, beginning of the period Unrecognized Tax Benefits Additions based on tax positions of the current period Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions based on tax positions of the prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Balance, end of the period Unrecognized Tax Benefits Including Interest Unrecognized Tax Benefits Including Interest Represents the amount of unrecognized tax benefits including interest, as of the balance sheet date. Statement of Cash Flows [Abstract] Cash flows from operating activities attributable to continuing operations: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Less: Loss from discontinued operations, net of tax 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 impairments and disposal of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Rental amortization of intangibles and depreciation Other Depreciation and Amortization Non-cash compensation expense Share-based Compensation Deferred income taxes Bad debt expense Other Noncash Expense Write-off of previously-capitalized debt issuance costs Write off of Deferred Debt Issuance Cost 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, Net of Income Taxes Receivable 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 intangible assets Payments to Acquire Intangible Assets Payments to acquire business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Payments to acquire businesses Acquisition of other businesses Other Payments to Acquire Businesses 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 exercise of stock options, net of payments related to net-share settlement of stock-based compensation Proceeds from Issuance of Common Stock Contingent consideration payments Acquisition of noncontrolling interest Payments to Noncontrolling Interests Proceeds from the issuance of 0.625% Convertible Senior Notes Proceeds from Convertible Debt Payment of convertible note hedge transactions Proceeds from equity offering, net of offering costs Proceeds from equity offering, financing activities Proceeds from equity offering, financing activities Payment of debt issuance costs Payments of Debt Issuance Costs Purchase of treasury stock Payments for Repurchase of Common Stock Net cash provided by (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 Discontinued 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 Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Interest Interest Paid Income tax payments Income Taxes Paid Income tax refunds Proceeds from Income Tax Refunds Schedule of assets acquired and liabilities assumed in a business acquisition Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of definite-lived intangible assets acquired in a business acquisition Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Unaudited pro forma revenue and net income from continuing operations of business acquisition Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Surety bond Surety Bond [Member] Commitment Guarantor Obligations [Line Items] Total Amounts Committed Guarantor Obligations, Maximum Exposure, Undiscounted Less Than 1 year Commitment Expiration Related to Performance and Completion of Contracts within One Year Represents the amount of commitment expiration in the first year after the balance sheet date related to performance and completion of contracts. 1-3 years Commitment Expiration Related to Performance and Completion of Contracts Due within Second and Third Year Represents the amount of commitment expiration within the second and third year after the balance sheet date related to performance and completion of contracts. 3-5 years Commitment Expiration Related to Performance and Completion of Contract Due within Three and Fifth Year Represents the amount of commitment expiration within the three and fifth year after the balance sheet date related to performance and completion of contracts. More Than 5 years Commitment Expiration Related to Performance and Completion of Contract Due after Fifth Year Represents the amount of commitment expiration after the fifth year of the balance sheet date related to performance and completion of contracts. Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Non-US Non-US [Member] Unamortized capitalized software development costs Capitalized Computer Software, Net Capitalized software development amortization expense Capitalized Computer Software, Amortization Long-lived assets Long-Lived Assets Reconciliation of income tax provision to amounts computed by statutory federal income tax rate to income (loss) from continuing operations before income taxes Effective Income Tax Rate Reconciliation, Amount [Abstract] Federal statutory income tax Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income taxes, net of effect of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Impact of Tax Cuts and Jobs Act Excess Tax Deductions on Non-Cash Compensation Proceeds And Excess Tax Benefit From Share based Compensation, Federal Proceeds And Excess Tax Benefit From Share based Compensation, Federal Change in (release of) valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Research and experimentation tax credit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Federal Statutory Income Tax Rate (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Accounts Receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Loan Loss Obligations (Discontinued Operations) Loan Loss Obligations Policy [Policy Text Block] Disclosure of accounting policy for loan loss obligation. Segment Reporting Segment Reporting, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Software Development Costs Internal Use Software, Policy [Policy Text Block] Goodwill and Indefinite-Lived Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Long-Lived Assets and Intangible Assets with Definite Lives Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Assets and Liabilities Held for Sale Assets And Liabilities Held For Sale [Policy Text Block] Assets And Liabilities Held For Sale [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Cost of Revenue Cost of Sales, Policy [Policy Text Block] Product Development Research and Development Expense, Policy [Policy Text Block] Advertising Advertising Costs, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Litigation Settlements and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Accounting Estimates Use of Estimates, Policy [Policy Text Block] Certain Risks and Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of revenue and net income 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 aggregate loans sold, subsequent settlements and remaining unsettled loans 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. 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] Summary 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, restricted stock and RSUs with performance conditions Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of accrued expenses and other current liabilities Schedule of Accrued Liabilities [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] ORGANIZATION Business Description and Basis of Presentation [Text Block] Schedule of quarterly financial information Quarterly Financial Information [Table 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] Net working capital and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Working Capital Amount recognized as of the acquisition date for the identifiable current assets acquired in excess of (less than) the aggregate current liabilities assumed. Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Fixed assets Total intangible assets with definite lives, net Other noncurrent assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Accounts payable and accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Noncontrolling interest Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Tenant leases Leases, Acquired-in-Place [Member] Other Other Intangible Assets [Member] Intangible assets with definite lives Finite-Lived Intangible Assets [Line Items] Weighted Average Amortization Life Finite-Lived Intangible Asset, Useful Life Cost Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] five months from the grant date Tranche 1 [Member] Tranche 1 [Member] one year from the grant date Tranche 2 [Member] Tranche 2 [Member] 50% over a period of two years from the grant date Tranche 3 [Member] Tranche 3 [Member] 20% over a period of one and a half years from the grant date Tranche 4 [Member] Tranche 4 [Member] 20% over a period of five and a half years from the grant date Tranche 5 [Member] Tranche 5 [Member] 33% over a period of three years from the grant date Tranche 6 [Member] Tranche 6 [Member] 25% over a period of two years from the grant date Tranche 7 [Member] Tranche 7 [Member] 75% over a period of three years from the grant date Tranche 8 [Member] Tranche 8 [Member] four years from the grant date Tranche 9 [Member] Tranche 9 [Member] 25% over a period of four years from the grant date Tranche 10 [Member] Tranche 10 [Member] 8% over a period of five months from the grant date Tranche 11 [Member] Tranche 11 [Member] 18% each year over a period of five years from the grant date Tranche 12 [Member] Tranche 12 [Member] 25% over a period of one year from the grant date Tranche 13 [Member] Tranche 13 [Member] 25% over a period of two years from the grant date Tranche 18 [Member] Tranche 18 [Member] 50% over a period of three years from the grant date Tranche 14 [Member] Tranche 14 [Member] 50% over a period of two years from the grant date Tranche 15 [Member] Tranche 15 [Member] 31% over a period of three years from the grant date Tranche 16 [Member] Tranche 16 [Member] 19% over a period of four years from the grant date Tranche 17 [Member] Tranche 17 [Member] Employee Stock Option 2 [Member] Employee Stock Option 2 [Member] Employee Stock Option 2 [Member] Performance Options [Member] Performance Options [Member] Performance Options Number of Options 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, Net of Forfeitures Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures 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 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 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 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 Options exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Cash received from stock option exercised Proceeds from Stock Options Exercised Actual tax benefit realized Deferred Tax Expense from Stock Options Exercised Weighted average fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected Term, Simplified Method Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Simplified Method Expected Volatility Rate, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected Volatility Rate, 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 Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Fair Value of Options Vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value INCOME TAXES Income Tax Disclosure [Text Block] GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS: Assets [Abstract] Accounts receivable (net of allowance of $1,143 and $675, respectively) Accounts Receivable, Net, Current Assets held for sale Assets Held-for-sale, Not Part of Disposal Group, 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 $13,887 and $13,043, respectively) Property, Plant and Equipment, Net Intangible assets, net Other non-current assets Other Assets, Noncurrent Non-current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Noncurrent Total assets Assets LIABILITIES: Liabilities [Abstract] Revolving credit facility, outstanding amount Long-term Debt, Current Maturities Accounts payable, trade Accounts Payable, Trade, Current Accrued expenses and other current liabilities Current liabilities of discontinued operations (Note 19) Disposal Group, Including Discontinued Operation, Liabilities, Current Total current liabilities Liabilities, Current Long-term debt, net of current portion Non-current contingent consideration Other non-current liabilities Other Liabilities, Noncurrent Deferred income tax liabilities Total liabilities Liabilities Commitments and contingencies (Notes 14 and 15) 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; 15,428,351 and 14,218,572 shares issued, respectively, and 12,809,764 and 11,979,434 shares outstanding, respectively Common Stock, Value, Outstanding Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock; 2,618,587 and 2,239,138 shares, respectively Treasury Stock, Value Noncontrolling interest (Note 8) Noncontrolling Interest in Variable Interest Entity Total shareholders' equity Total liabilities and shareholders' equity Liabilities and Equity Summary of assets acquired Schedule of Business Acquisitions, by Acquisition [Table Text Block] Disclosure of long lived assets held-for-sale Disclosure of Long Lived Assets Held-for-sale [Table Text Block] Schedule of future rental income Schedule of future rental income [Table Text Block] Schedule of future rental income [Table Text Block] Schedule of cash, restricted cash and cash equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Chairman And Chief Executive Officer [Member] Chairman And Chief Executive Officer [Member] Chairman And Chief Executive Officer [Member] Performance-Based Restricted Stock [Member] Performance-Based Restricted Stock [Member] Performance-Based Restricted Stock [Member] Time-Vested Performance Shares [Member] Time-Vested Performance Shares [Member] Time-Vested Performance Shares [Member] 2018 RSU Grants Restricted Stock Units (RSUs), 2018 Grants [Member] Restricted Stock Units (RSUs), 2018 Grants [Member] 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Performance Awards Earned Performance Awards Earned Performance Awards Earned Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period 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 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Non-cash stock-based compensation expense before income taxes Allocated Share-based Compensation Expense Annaul Grant Limit Per Employee, Shares Annaul Grant Limit Per Employee, Shares Annaul Grant Limit Per Employee, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period BUSINESS ACQUISITIONS Business Combination Disclosure [Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Change in valuation and qualifying accounts Movement in Valuation Allowances and Reserves [Roll Forward] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Equity Award Plan [Member] Equity Award Plan [Member] Equity Award Plan [Member] Inducement Plan [Member] Inducement Plan [Member] Inducement Plan [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract] Number of active plans Share Based Compensation Arrangement by Share Based Payment Award, Number of Active Plans Represents the number of active plans under which future awards may be granted. Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Term of plan Share Based Compensation Arrangements by Share Based Payment Award, Options Expiration Term The period of time, from the grant date until the time at which the share-based [option] award expires. Proceeds and Excess Tax Benefit from Share-based Compensation Proceeds and Excess Tax Benefit from Share-based Compensation 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] Income tax benefit related to non-cash compensation Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Schedule of future minimum payments under operating lease agreements Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of funding commitments that could potentially require performance in the event of demands by third parties or contingent events Commitments Related to Performance on Demand [Table Text Block] Tabular disclosure of commitments that could potentially require performance in the event of demands by third parties or contingent events. Schedule of reconciliation of the allowance for doubtful accounts Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of depreciation period for each asset category Property, Plant and Equipment [Table Text Block] Schedule of effect of new accounting pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Property, Plant and Equipment [Table] Land Land [Member] Leasehold improvements Leasehold Improvements [Member] Projects in progress Construction in Progress [Member] Total gross property and equipment Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property and equipment, net Operating Loss Carryforwards, Valuation Allowance Operating Loss Carryforwards, Valuation Allowance Valuation Allowance [Abstract] Valuation Allowance [Abstract] Balance, beginning of the period Deferred Tax Assets, Valuation Allowance Change in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Balance, end of the period Future minimum payments under operating lease Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments, Due in One Year Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Total Operating Leases, Future Minimum Payments Due Operating Leases, Rent Expense, Net Operating Leases, Rent Expense, Net Loss Contingencies [Line Items] Loss Contingencies, Number of Loans Sold Loss Contingencies, Number of Loans Sold Represents the number of loans sold by HLC Loss Contingencies, Original Principal Balance Loss Contingencies, Original Principal Balance Represents the original principal balance of loans sold by the entity. Loan loss reserve, beginning of period Provision adjustments 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 Loss Contingencies, Number of Loans Subsequently Settled Loss Contingencies, Number of Loans Subsequently Settled Loss Contingencies, Number of Loans Subsequently Settled Loss Contingencies,Value of Loans Subsequently Settled Loss Contingencies,Value of Loans Subsequently Settled Loss Contingencies,Value of Loans Subsequently Settled Loss Contingencies, Number of Unsettled Loans Remaining Loss Contingencies, Number of Unsettled Loans Remaining Represents the number of unsettled loans remaining. Loss Contingencies, Remaining Unsettled Loans Loss Contingencies, Remaining Unsettled Loans Represents the original issue balance remaining on unsettled loans. Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal Internal Revenue Service (IRS) [Member] State State and Local Jurisdiction [Member] Deferred tax assets and deferred tax liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Components of Deferred Tax Assets [Abstract] Provision for accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Net operating loss carryforwards (a) Deferred Tax Assets, Operating Loss Carryforwards Non-cash compensation expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Interest limitation Deferred Tax Asset, Interest Limitation Deferred Tax Asset, Interest Limitation Contingent liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Other Deferred Tax Assets, Other Total gross deferred tax assets Deferred Tax Assets, Gross Less: valuation allowance (b) Total deferred tax assets, net of the valuation allowance Gross Deferred Tax Assets, Net of Valuation Allowance Amount AFTER allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Intangible and other assets Deferred Tax Liabilities, Intangible Assets Other Deferred Tax Liabilities, Other Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Operating loss carryforwards Operating Loss Carryforwards State operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards, State and Local Schedule of Long Lived Assets Held-for-sale [Table] Schedule of Long Lived Assets Held-for-sale [Table] Long Lived Assets Held-for-sale [Line Items] Long Lived Assets Held-for-sale [Line Items] Number Of Buildings Held For Sale Number Of Buildings Held For Sale Number Of Buildings Held For Sale Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Accumulated Depreciation, Depletion And Amortization Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Accumulated Depreciation, Depletion And Amortization Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Accumulated Depreciation, Depletion And Amortization Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Net Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Net Assets Held-For-Sale, Not Part Of Disposal Group, Property, Plant, And Equipment, Net Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Gross Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Net Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Net Assets Held-For-Sale, Not Part Of Disposal Group, Finite-Lived Intangible Assets, Net Change in Accounting Estimate, Amount Change in Accounting Estimate, Amount Change in Accounting Estimate, Amount New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustment to Cash Flow Presentation 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. New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Line of Credit Facility [Table] Line of Credit Facility [Table] Revolving Credit Facility, Borrowings At Base Rate Plus LIBOR [Member] Revolving Credit Facility, Borrowings At Base Rate Plus LIBOR [Member] Revolving Credit Facility, Borrowings At Base Rate Plus LIBOR [Member] 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] Swingline Facility [Member] Swingline Facility [Member] Swingline Facility [Member] Letter of Credit [Member] Letter 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 Line Of Credit Facility, Increase Limit Line Of Credit Facility, Increase Limit Line Of Credit Facility, Increase Limit Revolving credit facility, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate 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 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 Revolving credit facility, debt issuance costs Debt Instrument, Fee Amount Debt Instrument, Unused Borrowing Capacity, Fee Debt Instrument, Unused Borrowing Capacity, Fee RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Accounts receivable, allowance Allowance for Doubtful Accounts Receivable, Current Accumulated depreciation 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 DISCONTINUED OPERATIONS