ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued expenses and other current liabilities
Accrued advertising expense	$ 54,045	$ 65,836
Accrued compensation and benefits	14,081	10,540
Accrued professional fees	1,869	1,560
Customer deposits and escrows	8,153	6,920
Contribution to LendingTree Foundation	3,333	3,333
Current lease liabilities	5,375	6,885
Other	14,340	17,681
Total accrued expenses and other current liabilities	$ 101,196	$ 112,755
Current lease liability, statement of financial position	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent