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Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 22, 2024 USD ($) | Apr. 24, 2023 USD ($) | Jun. 05, 2025 USD ($) | Dec. 31, 2025 USD ($) segment $ / shares | Dec. 31, 2024 USD ($) $ / shares | Apr. 22, 2024 USD ($) | Dec. 31, 2023 USD ($) $ / shares
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  | 2 |  |  |
Purchase of equity investment |  |  |  | $ 10,000 | $ 106,345 |  | $ 76,999
Foreign currency net losses |  |  |  | (11,300) | 21,000 |  | 7,000
Accounts receivable sold under factoring arrangements |  |  |  | 47,900 | 52,100 |  |
Depreciation |  |  |  | 218,600 | 126,200 |  | 126,000
Net Income (Loss) |  |  |  | $ (410,351) | $ (421,362) |  | $ (445,053)
Earnings Per Share, Basic | $ / shares |  |  |  | $ (5.66) | $ (5.63) |  | $ (5.82)
Diluted (usd per share) | $ / shares |  |  |  | $ (5.65) | $ (5.62) |  | $ (5.81)
Capitalized computer software, gross |  |  |  | $ 38,500 | $ 23,100 |  |
Costs to obtain contracts |  |  |  | 29,200 | 25,800 |  |
Amortization of costs to obtain contracts |  |  |  | 15,600 | 18,700 |  | $ 12,500
Revenue remaining performance obligation |  |  |  | 1,352,700 | 1,444,900 |  |
Advertising cost |  |  |  | 188,700 | 185,000 |  | $ 201,200
Service Life | Specifically Identified Manufacturing Assets |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Depreciation |  |  |  | 76,900 |  |  |
Net Income (Loss) |  |  |  | $ 53,900 |  |  |
Earnings Per Share, Basic | $ / shares |  |  |  | $ 0.74 |  |  |
Diluted (usd per share) | $ / shares |  |  |  | $ 0.74 |  |  |
Heartland |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Equity interest |  | 5.00% |  |  |  |  |
Purchase of equity investment | $ 75,000 | $ 75,000 |  |  |  | $ 150,000 |
Increase to carrying value of equity investments |  |  |  | $ 18,000 | $ 6,000 |  |
Equity Method Investments |  |  |  | $ 174,000 |  |  |
SD Holding Company |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Equity interest |  |  | 3.00% |  |  |  |
Purchase of equity investment |  |  | $ 40,000 |  |  |  |
Clear Aligner |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Warranty period |  |  |  | 3 months |  |  |
Intraoral Scanners |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Warranty period |  |  |  | 1 year |  |  |
CAD/CAM Software |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Warranty period |  |  |  | 1 year |  |  |
Invisalign | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Expected timing |  |  |  | 6 months |  |  |
Invisalign | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Expected timing |  |  |  | 5 years |  |  |
Systems and Services |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Warranty period |  |  |  | 1 year |  |  |
Systems and Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Expected timing |  |  |  | 1 year |  |  |
Systems and Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Expected timing |  |  |  | 5 years |  |  |
Minimum |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Estimated useful lives of intangibles |  |  |  | 7 years |  |  |
Maximum |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Estimated useful lives of intangibles |  |  |  | 12 years |  |  |

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