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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
May 25, 2022
Dec. 31, 2017
Jun. 30, 2022
Commitments and Contingencies:      
Corporate Integrity Agreement Period     5 years
Corporate Integrity Agreement Expiration Date     Oct. 22, 2019
Commitments to provide operating capital      
Commitments and Contingencies:      
Other potential commitments to provide operating capital to several dialysis centers     $ 12,425
Agreement with Medtronic      
Commitments and Contingencies:      
Business Agreement Date May 25, 2022    
Other Commitment, to be Paid, Year One $ 75,000    
Other Noncash Assets Commitment 25,000    
Additional Cash Commitment 200,000    
Other Commitment, to be Paid, after Year Five $ 300,000    
Regulatory and Commercial Milestones Beginning Date Jan. 01, 2024    
Regulatory and Commercial Milestones Ending Date Dec. 31, 2028    
US Attorney Prescription Drug Investigation      
Commitments and Contingencies:      
Litigation Settlement, Amount Awarded to Other Party   $ 63,700  
Incremental Cash Portion | US Attorney Prescription Drug Investigation      
Commitments and Contingencies:      
Litigation Settlement, Amount Awarded to Other Party   41,500  
Cash Paid For Portion Previously Refunded | US Attorney Prescription Drug Investigation      
Commitments and Contingencies:      
Litigation Settlement, Amount Awarded to Other Party   $ 22,200