SEGMENT INFORMATION (Details) $ in Thousands		12 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
SEGMENT INFORMATION
Number of operating segments | segment		3
Number of reportable segments | segment		3
Revenue		$ 672,502	$ 984,992	$ 1,098,499
Segment cost of revenue and marketing expense		382,748	616,051	688,133
Segment profit (loss)		289,754	368,941	410,366
Cost of revenue		38,758	57,769	57,297
Brand and other marketing expense		50,840	86,187	85,857
General and administrative expense		117,700	152,383	153,472
Product development		47,197	55,553	52,865
Depreciation		19,070	20,095	17,910
Amortization of intangibles		7,694	25,306	42,738
Goodwill impairment		38,600	0	0
Change in fair value of contingent consideration		0	0	(8,249)
Restructuring and severance		10,118	4,428	53
Litigation settlements and contingencies		388	(18)	392
Operating (loss) income		(40,611)	(32,762)	8,031
Interest income (expense), net		21,685	(26,014)	(46,867)
Other income (expense)		(105,993)	3,843	123,272
(Loss) income before income taxes		(124,919)	(54,933)	84,436
Home
SEGMENT INFORMATION
Revenue		143,753	289,383	441,738
Segment cost of revenue and marketing expense		95,871	186,299	288,386
Segment profit (loss)		47,882	103,084	153,352
Goodwill impairment	$ 0
Consumer
SEGMENT INFORMATION
Revenue		278,945	396,109	329,945
Segment cost of revenue and marketing expense		140,068	221,531	186,448
Segment profit (loss)		138,877	174,578	143,497
Goodwill impairment	0
Insurance
SEGMENT INFORMATION
Revenue		249,605	299,073	326,153
Segment cost of revenue and marketing expense		146,101	207,239	212,689
Segment profit (loss)		103,504	91,834	113,464
Goodwill impairment	$ 38,600
Other
SEGMENT INFORMATION
Revenue		199	427	663
Segment cost of revenue and marketing expense		708	982	610
Segment profit (loss)		$ (509)	$ (555)	$ 53