Goodwill and Internal Use Software and Other Intangible Assets, Net - Schedule of Finite and Indefinite-Lived Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 160,868	$ 148,863
Total Internal use software and other intangible assets, net	162,722	150,714
Accumulated Amortization	(141,202)	(129,778)
Net Carrying Value	19,666	19,085
Total Internal use software and other intangible assets, net	21,520	20,936
Domain name
Finite-Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives	1,820	1,820
Licenses and other
Finite-Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives	$ 34	$ 31
Internal use software and website development
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (in years)	3 years 4 months 24 days	3 years
Gross Carrying Value	$ 158,241	$ 147,994
Accumulated Amortization	(139,263)	(129,487)
Net Carrying Value	$ 18,978	$ 18,507
Intellectual property and other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (in years)	5 years 6 months	6 years
Gross Carrying Value	$ 2,627	$ 869
Accumulated Amortization	(1,939)	(291)
Net Carrying Value	$ 688	$ 578