SEGMENT INFORMATION (Details) $ in Thousands		12 Months Ended
	Sep. 30, 2019 segment	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
SEGMENT INFORMATION
Number of operating segments | segment		3
Number of reportable segments | segment	1	3
Revenue		$ 1,098,499	$ 909,990	$ 1,106,603
Segment cost of revenue and marketing expense		688,133	540,517	674,285
Segment profit		410,366	369,473	432,318
Cost of revenue		57,297	53,408	45,624
Brand and other marketing expense		85,857	77,973	83,650
General and administrative expense		153,472	129,101	116,847
Product development		52,865	43,636	39,953
Depreciation		17,910	14,201	10,998
Amortization of intangibles		42,738	53,078	55,241
Change in fair value of contingent consideration		(8,249)	5,327	28,402
Severance		53	295	1,026
Litigation settlements and contingencies		392	(943)	(151)
Operating income (loss)		8,031	(6,603)	50,728
Interest expense, net		(46,867)	(36,300)	(20,271)
Other income		123,272	376	524
Income (loss) before income taxes		84,436	(42,527)	30,981
Home
SEGMENT INFORMATION
Revenue		441,738	320,992	277,935
Segment cost of revenue and marketing expense		288,386	188,869	174,814
Segment profit		153,352	132,123	103,121
Consumer
SEGMENT INFORMATION
Revenue		329,945	253,198	515,037
Segment cost of revenue and marketing expense		186,448	146,308	301,852
Segment profit		143,497	106,890	213,185
Insurance
SEGMENT INFORMATION
Revenue		326,153	333,765	284,792
Segment cost of revenue and marketing expense		212,689	202,623	170,153
Segment profit		113,464	131,142	114,639
Other
SEGMENT INFORMATION
Revenue		663	2,035	28,839
Segment cost of revenue and marketing expense		610	2,717	27,466
Segment profit		$ 53	$ (682)	$ 1,373