Equity Method and Other Investments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity Method Investment income from equity method investments
Equity investment income (loss) from equity method investments in nonconsolidated dialysis partnerships.	$ 7,228	$ 8,509	$ 22,502	$ 24,696
Other Nonoperating Income (Expense)
Equity Method Investment income from equity method investments
Equity investment income (loss) from other equity method investments			(38,653)	(1,974)
Equity Method Investments In Nonconsolidated Dialysis Partnerships [Member]
Equity Method Investment income from equity method investments
Equity investment income (loss) from equity method investments in nonconsolidated dialysis partnerships.			$ 22,502	$ 24,696