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RELATED PARTY TRANSACTIONS	12 Months Ended
RELATED PARTY TRANSACTIONS	Dec. 31, 2020
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS A then-member of the Company's board of directors served as a director to a marketing partner of the Company through 2018. During 2018, the Company recognized $0.7 million of expenses for this marketing partner through the normal course of business. In 2017, the Company's Board of Directors approved a $10.0 million contribution to fund the newly formed LendingTree Foundation. In each of 2020 and 2019, the Company paid $3.3 million of the $10.0 million contribution, and expects to pay the final installment in 2021. Officers of the Company serve as officers of the LendingTree Foundation.