v3.26.1
Segment reporting - Summary of Expenditures for Property and Equipment by Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Expenditures for property and equipment $ 102,018 $ 143,258
Segment, Expenditure, Addition to Long-Lived Assets 102,018 143,258
U. S. Dialysis And Related Lab Services    
Segment Reporting Information [Line Items]    
Segment, Expenditure, Addition to Long-Lived Assets 88,441 113,591
Other Operating Segment    
Segment Reporting Information [Line Items]    
Segment, Expenditure, Addition to Long-Lived Assets $ 13,577 $ 29,667