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Segments and Geographical Information - Non-Cash Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | $ 173,703 | $ 154,026 | $ 133,367
Depreciation and amortization | 145,034 | 142,401 | 125,793
Operating Segments | Clear Aligner |  |  |
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | 22,888 | 13,963 | 14,816
Depreciation and amortization | 67,450 | 64,781 | 57,888
Operating Segments | Systems and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | 1,595 | 1,293 | 994
Depreciation and amortization | 30,998 | 31,518 | 28,300
Unallocated corporate expense |  |  |
Segment Reporting Information [Line Items] |  |  |
Stock-based compensation | 149,220 | 138,770 | 117,557
Depreciation and amortization | $ 46,586 | $ 46,102 | $ 39,605

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