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Equity Method Investments (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 26, 2025 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity method investments |  | $ 346,400 | $ 320,900 |
Revenue from contracted services and management fees to related parties |  | 5,452,830 | 5,187,105 | $ 4,825,977
Accounts receivable from related parties, current |  | 864,207 | 821,385 |
Exchange for equity interest, asset value | $ 45,800 |  |  |
Equity method investment, distribution transferred | $ 23,300 |  |  |
Related Parties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Revenue from contracted services and management fees to related parties |  | 455,200 | 430,300 | $ 402,800
Accounts receivable from related parties, current |  | 25,600 | 17,800 |
Accounts receivable from related parties, noncurrent |  | 2,400 | 2,200 |
Liabilities to related parties |  | $ 57,900 | $ 59,000 |
BIR JV, LLP |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 49.00% |  |
OHRH, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 49.00% |  |
GlobalRehab—Scottsdale, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 49.00% |  |
ES Rehabilitation, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 49.00% |  |
BHSM Rehabilitation, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 49.00% |  |
RSH Property Ventures, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage of ownership |  | 50.00% |  |

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