SEGMENT INFORMATION - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total revenues	$ 700,821		$ 640,178	$ 2,022,604	$ 1,859,290
Cost of revenue (excluding depreciation and amortization)	349,075		331,839	1,022,491	971,480
Sales and marketing	79,577		69,131	214,701	195,568
Product development	66,989		61,030	197,468	186,435
Other components of net periodic benefit costs	4,640		1,050	13,917	3,124
Depreciation and amortization	21,341		20,622	64,115	61,865
Generative AI Litigation Costs	2,411		4,620	10,298	7,592
Multiemployer pension plan liability adjustment	0	$ 4,500	0	4,453	0
Income before income taxes	107,999		85,043	283,631	227,781
Reportable Segment
Segment Reporting Information [Line Items]
Total revenues	700,821		640,178	2,022,604	1,859,290
Cost of revenue (excluding depreciation and amortization)	349,075		331,839	1,022,491	971,480
Sales and marketing	79,577		69,131	214,701	195,568
Product development	66,989		61,030	197,468	186,435
Adjusted general and administrative	73,796		73,997	230,087	220,872
Total adjusted operating profit	131,384		104,181	357,857	284,935
Other components of net periodic benefit costs	4,640		1,050	13,917	3,124
Depreciation and amortization	21,341		20,622	64,115	61,865
Severance	1,600		329	5,207	6,230
Multiemployer pension plan withdrawal costs	1,244		1,883	3,811	4,792
Generative AI Litigation Costs	2,411		4,620	10,298	7,592
Multiemployer pension plan liability adjustment	0		0	4,453	0
Interest income and other, net	7,851		9,366	27,575	26,449
Income before income taxes	107,999		85,043	283,631	227,781
Subscription
Segment Reporting Information [Line Items]
Total revenues	494,630		453,327	1,440,307	1,321,654
Subscription | Reportable Segment
Segment Reporting Information [Line Items]
Total revenues	494,630		453,327	1,440,307	1,321,654
Advertising
Segment Reporting Information [Line Items]
Total revenues	132,291		118,370	374,341	341,244
Advertising | Reportable Segment
Segment Reporting Information [Line Items]
Total revenues	132,291		118,370	374,341	341,244
Affiliate, licensing and other
Segment Reporting Information [Line Items]
Total revenues	73,900		68,481	207,956	196,392
Affiliate, licensing and other | Reportable Segment
Segment Reporting Information [Line Items]
Total revenues	$ 73,900		$ 68,481	$ 207,956	$ 196,392