Equity Method and Other Investments - Additional Information (Details) $ in Thousands	12 Months Ended
Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Equity Method Investment income from equity method investments
Equity investment income (loss) from equity method investments in nonconsolidated dialysis partnerships.	$ 27,864	$ 26,520	$ 26,937
Minimum \| Company and Restricted Subsidiaries(1)
Equity Method Investment income from equity method investments
Ownership percentage by the Company	30.00%
Maximum \| Company and Restricted Subsidiaries(1)
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	20,154	0
Equity investment income (loss) from other equity method investments	(59,508)	(4,703)	(1,292)
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.	$ 27,864	$ 26,520	$ 26,937
Number of equity method investments	23

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