Segments - Segment Information By Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total revenue	$ 544,833		$ 315,648		$ 1,130,843	$ 593,819
Less:
Cost of revenue	128,637		59,035		283,958	108,111
Customer acquisition costs	188,378		123,847		389,968	237,023
Depreciation and amortization expense included within operating expenses	9,800		3,163		17,336	6,020
Interest income and expense, net	(6,117)		(2,431)		(8,713)	(4,971)
Benefit (provision) for income taxes	(9,652)		127		1,358	1,402
Other segment items	82,067		47,644		158,379	87,597
Net income	42,505	$ 49,485	13,297	$ 11,128	91,990	24,425
Adjustments and reconciling items	0		0		0	0
Employee Compensation
Less:
Marketing	11,499		8,972		22,011	17,665
Operations and support	26,542		17,001		50,365	33,636
Technology and development	15,840		9,120		29,330	17,167
General and administrative	19,608		11,831		34,277	22,670
Stock-Based Compensation
Less:
Marketing	3,435		2,393		6,209	4,297
Operations and support	4,579		2,702		7,585	4,857
Technology and development	5,247		3,195		9,292	5,400
General and administrative	$ 22,465		$ 15,752		$ 37,498	$ 28,520