Organization and Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 clinic entity patient state country
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Medicare Payment Rate Established By Statute Or Regulation For The Portion Of Payment Rates Paid By The Government Payor	80.00%
Number of legal entities that third parties held noncontrolling equity interests | entity	717
United States
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of dialysis centers that the company operated or provided administrative services | clinic	2,815
Number of states where dialysis centers are located | state	46
Number of patients served | patient	203,100
International Operations
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of dialysis centers that the company operated or provided administrative services | clinic	339
Number of patients served | patient	39,900
Number of countries in which dialysis centers located | country	10