Segments and Geographical Information - Non-Cash Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Stock-based compensation	$ 40,924	$ 44,997
Depreciation and amortization	56,548	39,148
Change in estimated useful life | Specifically identified manufacturing assets
Segment Reporting Information [Line Items]
Depreciation	15,600
Operating Segments | Clear Aligner
Segment Reporting Information [Line Items]
Stock-based compensation	5,949	5,818
Depreciation and amortization	37,638	18,904
Operating Segments | Systems and Services
Segment Reporting Information [Line Items]
Stock-based compensation	377	403
Depreciation and amortization	10,534	8,469
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Stock-based compensation	34,598	38,776
Depreciation and amortization	$ 8,376	$ 11,775