Segments - Segment Information By Segment (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total revenue	$ 598,976			$ 401,556			$ 1,729,819	$ 995,375
Less:
Cost of revenue	156,918			83,670			440,876	191,781
Customer acquisition costs	202,574			160,654			592,542	397,677
Depreciation and amortization expense included within operating expenses	16,802			3,842			34,138	9,862
Interest income and expense, net	(8,008)			(2,637)			(16,721)	(7,608)
Benefit from income taxes	(3,551)			(51,995)			(2,193)	(50,593)
Other segment items	104,743			57,508			263,122	145,105
Net income	15,774	$ 42,505	$ 49,485	75,588	$ 13,297	$ 11,128	107,764	100,013
Adjustments and reconciling items	0			0			0	0
Employee Compensation
Less:
Marketing	9,828			9,046			31,839	26,711
Operations and support	30,771			18,617			81,136	52,253
Technology and development	13,992			10,517			43,322	27,684
General and administrative	18,961			11,847			53,238	34,517
Stock-Based Compensation
Less:
Marketing	3,116			2,458			9,325	6,755
Operations and support	5,452			2,605			13,037	7,462
Technology and development	4,842			3,310			14,134	8,710
General and administrative	$ 26,762			$ 16,526			$ 64,260	$ 45,046