ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued expenses and other current liabilities
Accrued litigation liabilities	$ 346	$ 736
Accrued advertising expense	40,727	26,976
Accrued compensation and benefits	7,679	5,626
Accrued professional fees	2,072	1,411
Customer deposits and escrows	5,564	5,041
Contribution to LendingTree Foundation	10,000	0
Other	10,795	9,613
Total accrued expenses and other current liabilities	$ 77,183	$ 49,403