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Equity Method and Other Investments - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Equity Method Investment income from equity method investments |  |  |
Equity investment income (loss) from equity method investments in nonconsolidated dialysis partnerships. | $ 26,189 | $ 27,864 | $ 26,520
Minimum | Company and Restricted Subsidiaries |  |  |
Equity Method Investment income from equity method investments |  |  |
Ownership percentage by the Company | 30.00% |  |
Maximum | Company and Restricted Subsidiaries |  |  |
Equity Method Investment income from equity method investments |  |  |
Ownership percentage by the Company | 65.00% |  |
Other Nonoperating Income (Expense) |  |  |
Equity Method Investment income from equity method investments |  |  |
Equity method investment, significant impairments and other valuation adjustments | $ 0 | 0 | 20,154
Equity investment income (loss) from other equity method investments | (112,696) | (59,508) | (4,703)
Equity Method Investments In Nonconsolidated Dialysis Partnerships |  |  |
Equity Method Investment income from equity method investments |  |  |
Equity investment income (loss) from equity method investments in nonconsolidated dialysis partnerships. | $ 26,189 | $ 27,864 | $ 26,520
Number of equity method investments | 17 |  |

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