Segments and Geographical Information - Summarized Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net revenues	$ 995,692	$ 977,872	$ 2,987,403	$ 3,003,793
Cost of net revenues	356,491	296,098	959,977	901,575
Gross profit	639,201	681,774	2,027,426	2,102,218
Operating expenses	542,903	519,476	1,636,995	1,638,739
Segment income from operations	96,298	162,298	390,431	463,479
Operating Segments
Segment Reporting Information [Line Items]
Segment income from operations	310,549	345,063	981,984	1,051,410
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Operating expenses	214,251	182,765	591,553	587,931
Segment income from operations	(214,251)	(182,765)	(591,553)	(587,931)
Clear Aligner | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	805,799	786,844	2,407,259	2,435,833
Cost of net revenues	282,941	234,003	758,506	715,309
Gross profit	522,858	552,841	1,648,753	1,720,524
Operating expenses	272,150	276,522	870,810	858,341
Segment income from operations	250,708	276,319	777,943	862,183
Systems and Services | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	189,893	191,028	580,144	567,960
Cost of net revenues	73,550	62,095	201,471	186,266
Gross profit	116,343	128,933	378,673	381,694
Operating expenses	56,502	60,189	174,632	192,467
Segment income from operations	$ 59,841	$ 68,744	$ 204,041	$ 189,227