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Organization and Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2022
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 689
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 2,724
Number of states where dialysis centers are located | state 46
Number of patients served | patient 199,400
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 350
Number of patients served | patient 45,600
Number of countries in which dialysis centers located | country 11