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Segments and Geographical Information - Segments Information - (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Net revenues $ 3,862,260 $ 3,734,635 $ 3,952,584
Gross profit 2,706,863 2,633,775 2,935,355
Income from operations 643,338 642,595 976,400
Stock-based compensation 154,026 133,367 114,336
Depreciation and amortization 142,401 125,793 108,729
Operating Segments      
Segment Reporting Information [Line Items]      
Income from operations 1,373,612 1,314,185 1,584,993
Unallocated corporate expense      
Segment Reporting Information [Line Items]      
Income from operations (730,274) (671,590) (608,593)
Stock-based compensation 138,770 117,557 102,983
Depreciation and amortization 46,102 39,605 36,425
Clear Aligner      
Segment Reporting Information [Line Items]      
Net revenues 3,199,329 3,072,585 3,247,080
Gross profit 2,288,038 2,228,170 2,474,373
Clear Aligner | Operating Segments      
Segment Reporting Information [Line Items]      
Income from operations 1,182,257 1,134,420 1,325,866
Stock-based compensation 13,963 14,816 10,648
Depreciation and amortization 64,781 57,888 50,723
Systems and Services      
Segment Reporting Information [Line Items]      
Net revenues 662,931 662,050 705,504
Gross profit 418,825 405,605 460,982
Systems and Services | Operating Segments      
Segment Reporting Information [Line Items]      
Income from operations 191,355 179,765 259,127
Stock-based compensation 1,293 994 705
Depreciation and amortization $ 31,518 $ 28,300 $ 21,581