SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2015
Accounting Policies [Abstract]
Accounting Estimates	Accounting Estimates Management is required to make certain estimates and assumptions during the preparation of the consolidated financial statements in accordance with GAAP. These estimates and assumptions impact the reported amount of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements. They also impact the reported amount of net earnings during any period. Actual results could differ from those estimates. Significant estimates underlying the accompanying consolidated financial statements, including discontinued operations, include: loan loss obligations; the recoverability of long-lived assets, goodwill and intangible assets; the determination of income taxes payable and deferred income taxes, including related valuation allowances; contingent consideration related to business combinations; litigation accruals; various other allowances, reserves and accruals; and assumptions related to the determination of stock-based compensation.
Certain Risks and Concentrations	Certain Risks and Concentrations LendingTree's business is subject to certain risks and concentrations including dependence on third-party technology providers, exposure to risks associated with online commerce security and credit card fraud. Financial instruments, which potentially subject the Company to concentration of credit risk at September 30, 2015, consist primarily of cash and cash equivalents and accounts receivable, as disclosed in the consolidated balance sheet. Cash and cash equivalents are in excess of Federal Deposit Insurance Corporation insurance limits, but are maintained with quality financial institutions of high credit. The Company generally requires certain marketplace lenders to maintain security deposits with the Company, which in the event of non-payment, would be applied against any accounts receivable outstanding. Due to the nature of the mortgage lending industry, interest rate increases may negatively impact future revenue from the Company's lender marketplace. Lenders participating on the Company's marketplace can offer their products directly to consumers through brokers, mass marketing campaigns or through other traditional methods of credit distribution. These lenders can also offer their products online, either directly to prospective borrowers, through one or more online competitors, or both. If a significant number of potential consumers are able to obtain loans from participating lenders without utilizing the Company's services, the Company's ability to generate revenue may be limited. Because the Company does not have exclusive relationships with the lenders whose loan offerings are offered on its online marketplace, consumers may obtain offers and loans from these lenders without using its service. The Company maintains operations solely in the United States.
Litigation Settlements and Contingencies	Litigation Settlements and Contingencies Litigation settlements and contingencies consists of expenses related to actual or anticipated litigation settlements, in addition to legal fees incurred in connection with various patent litigation claims the Company pursues against others.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-05 related to cloud computing arrangements. This ASU sets forth guidance on accounting for fees paid in a cloud computing arrangement and specifically outlines how to determine whether a cloud computing arrangement contains a software license or is solely a service contract. This ASU will be effective for annual and interim reporting periods beginning after December 15, 2015 and permits early adoption. The Company early adopted this ASU and it did not have a significant impact on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09 related to revenue recognition. This ASU was initiated as a joint project between the FASB and the International Accounting Standards Board ("IASB") to clarify the principles for recognizing revenue and to develop a common revenue standard for GAAP and international financial reporting standards ("IFRS"). This guidance will supersede the existing revenue recognition requirements in Accounting Standards Codification ("ASC") Topic 605, Revenue Recognition and was set to be effective for annual reporting periods beginning after December 15, 2016. However, in July 2015, the FASB deferred the effective date by one year, such that the standard will be effective for annual reporting periods beginning after December 15, 2017. Early adoption is permitted as of the original effective date of December 15, 2016. The ASU can be applied (i) retrospectively to each prior period presented or (ii) retrospectively with the cumulative effect of initially adopting the ASU recognized at the date of initial application. The Company is evaluating the impact this ASU will have on its consolidated financial statements and whether to adopt early.