SEGMENT INFORMATION - Operating Income (loss) and Adjusted EBITDA by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ (26,498)	$ (75,620)	$ (67,917)
Adjusted EBITDA	118,478	66,479	35,376
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Operating Income (Loss)	(61,377)	(61,794)	(56,196)
Adjusted EBITDA	(50,076)	(49,866)	(46,066)
Ads and Leads | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	50,043	85,593	65,485
Adjusted EBITDA	147,357	168,952	136,260
Services | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	(23,450)	(95,166)	(63,984)
Adjusted EBITDA	8,123	(52,126)	(48,203)
International | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)	8,286	(4,253)	(13,222)
Adjusted EBITDA	$ 13,074	$ (481)	$ (6,615)