LEASES - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Fixed lease expense	$ 12,132	$ 14,720	$ 25,344
Variable lease expense	5,263	4,667	4,092
Net lease expense	17,395	19,387	29,436
Lease impairment charges	700	1,700	7,800
Sublease Income	4,300	4,700	1,800
Cost of revenue
Lessee, Lease, Description [Line Items]
Fixed lease expense	392	437	346
Selling and marketing expense
Lessee, Lease, Description [Line Items]
Fixed lease expense	116	2,669	7,305
Variable lease expense	36	200	1,087
General and administrative expense
Lessee, Lease, Description [Line Items]
Fixed lease expense	11,225	11,122	16,461
Variable lease expense	5,071	4,444	2,438
Product development expense
Lessee, Lease, Description [Line Items]
Fixed lease expense	399	492	1,232
Variable lease expense	$ 156	$ 23	$ 567