Segments and Geographical Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net revenues	$ 973,219	$ 894,771
Gross profit	709,346	677,098
Income from operations	198,082	225,446
Stock-based compensation	31,621	27,241
Depreciation and amortization	29,626	25,635
Interest income	677	1,643
Other income (expense), net	(11,273)	34,532
Net income before provision for income taxes	187,486	261,621
Operating Segments
Segment Reporting Information [Line Items]
Income from operations	363,518	374,693
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Income from operations	(165,436)	(149,247)
Stock-based compensation	28,553	24,776
Depreciation and amortization	8,937	9,970
Clear Aligner
Segment Reporting Information [Line Items]
Net revenues	809,696	753,269
Gross profit	605,696	584,534
Clear Aligner | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	312,719	327,465
Stock-based compensation	2,854	2,294
Depreciation and amortization	13,767	11,120
Systems and Services
Segment Reporting Information [Line Items]
Net revenues	163,523	141,502
Gross profit	103,650	92,564
Systems and Services | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	50,799	47,228
Stock-based compensation	214	171
Depreciation and amortization	$ 6,922	$ 4,545