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Segment Reporting - Summary of Assets by Segment (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
ASSETS    
Assets $ 16,928,252 $ 17,121,488
Equity method and other investments 231,108 238,881
Property and equipment, net of accumulated depreciation 3,256,397 3,479,972
U.S. dialysis    
ASSETS    
Assets 15,084,454 15,375,000
Equity method and other investments 113,781 112,500
Other - Ancillary services    
ASSETS    
Assets 1,843,798 1,746,488
Equity method and other investments 117,327 126,381
Other - Ancillary services | International    
ASSETS    
Property and equipment, net of accumulated depreciation $ 207,162 $ 190,029