Segments and Geographical Information - Non-Cash Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Stock-based compensation	$ 48,208	$ 47,028	$ 93,205	$ 85,816
Depreciation and amortization	40,576	36,166	79,724	69,112
Operating Segments | Clear Aligner
Segment Reporting Information [Line Items]
Stock-based compensation	6,065	8,619	11,883	12,383
Depreciation and amortization	19,495	16,623	38,399	31,056
Operating Segments | Systems and Services
Segment Reporting Information [Line Items]
Stock-based compensation	403	421	806	780
Depreciation and amortization	9,302	8,070	17,771	14,908
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Stock-based compensation	41,740	37,988	80,516	72,653
Depreciation and amortization	$ 11,779	$ 11,473	$ 23,554	$ 23,148