RELATED PARTY TRANSACTIONS (Details) $ in Millions	3 Months Ended
Dec. 31, 2022 USD ($)
Related Party Transactions [Abstract]
Additional approved value	$ 0.5

Charitable Contribution, Additional Approved Value

No definition available.

Name:	tree_CharitableContributionAdditionalApprovedValue
Namespace Prefix:	tree_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration