Revenue Recognition - Schedule of Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 793,981	$ 592,183	$ 2,243,377	$ 1,640,615
United States
Disaggregation of Revenue [Line Items]
Total revenues	778,253	582,371	2,203,323	1,612,479
Americas, excluding U.S.
Disaggregation of Revenue [Line Items]
Total revenues	2,108	1,523	6,730	4,786
Europe, Middle East, India, Africa
Disaggregation of Revenue [Line Items]
Total revenues	11,293	6,006	26,733	17,463
Asia Pacific and Other
Disaggregation of Revenue [Line Items]
Total revenues	2,327	2,283	6,591	5,887
Insurance carriers
Disaggregation of Revenue [Line Items]
Total revenues	733,201	559,505	2,096,379	1,549,140
Laboratory partners
Disaggregation of Revenue [Line Items]
Total revenues	50,260	25,098	116,822	68,099
Patients
Disaggregation of Revenue [Line Items]
Total revenues	$ 10,520	$ 7,580	$ 30,176	$ 23,376