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Revenue - Schedule of Revenue and Percentage Generated by Each Payor Type (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenue, Major Customer [Line Items]    
Revenue $ 770,505 $ 768,051
U.S. Facilities [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 770,505 $ 768,051
Revenue, Percentage 100.00% 100.00%
U.S. Facilities [Member] | Commercial [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 192,755 $ 196,017
Revenue, Percentage 25.00% 25.50%
U.S. Facilities [Member] | Medicare [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 114,754 $ 109,388
Revenue, Percentage 14.90% 14.20%
U.S. Facilities [Member] | Medicaid [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 430,814 $ 436,422
Revenue, Percentage 55.90% 56.90%
U.S. Facilities [Member] | Self-Pay [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 18,165 $ 16,427
Revenue, Percentage 2.40% 2.10%
U.S. Facilities [Member] | Other [Member]    
Revenue, Major Customer [Line Items]    
Revenue $ 14,017 $ 9,797
Revenue, Percentage 1.80% 1.30%