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RELATED PARTY TRANSACTIONS WITH IAC - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Services Agreement
Related Party Transaction [Line Items]
Automatic renewal periods for related party agreement	1 year
Employee Matters Agreement
Related Party Transaction [Line Items]
Voting interest (as a percent)	80.00%
IAC \| Services Agreement
Related Party Transaction [Line Items]
Charges for services rendered pursuant to the services agreement	$ 3,900,000	$ 4,800,000	$ 4,800,000
IAC \| Sublease Agreement
Related Party Transaction [Line Items]
Amounts due from related party	0	100,000	100,000
Payments received from related party	1,600,000	1,800,000	$ 1,400,000
Amounts due to related party	0
Expenses from related party transactions	600,000
IAC \| Tax Sharing Agreement
Related Party Transaction [Line Items]
Payments received from related party		3,100,000
Amounts due to related party	$ 300,000	900,000
Expenses from related party transactions		$ 1,500,000
IAC \| Employee Matters Agreement \| Class B Common Stock
Related Party Transaction [Line Items]
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)	200,000	300,000	500,000
IAC \| Employee Matters Agreement \| Class A Common Stock
Related Party Transaction [Line Items]
Issuance of common stock to IAC pursuant to the employee matters agreement (shares)	2,600,000	0	0