BENEFIT PLANS	12 Months Ended
	Dec. 31, 2020
Defined Contribution Plan [Abstract]
BENEFIT PLANS	BENEFIT PLANSThe Company operates a retirement savings plan for its employees in the United States that is qualified under Section 401(k) of the Internal Revenue Code. Employees are eligible to enroll in the plan upon date of hire. Participating employees may contribute up to 50% of their pre-tax earnings, but not more than statutory limits ($19,500 for 2020, $19,000 for 2019, and $18,500 for 2018). The company match contribution is fifty cents for each dollar a participant contributes to the plan, with a maximum contribution of 6% of a participant's eligible earnings. Matching contributions are invested in the same manner as each participant's voluntary contributions in the investment options provided under the plan. LendingTree stock is not included in the available investment options or the plan assets. Funds contributed to the plan vest according to the participant's years of service, with one year of service vesting at 33%, two years of service vesting at 66%, and three years or more of service vesting at 100%. Matching contributions were approximately $2.4 million, $2.0 million and $1.4 million for the years ended December 31, 2020, 2019 and 2018, respectively.