Revenue - Schedule of Revenue and Percentage Generated by Each Payor Type (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 815,634	$ 750,334	$ 2,379,725	$ 2,185,938
U.S. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 815,634	$ 750,334	$ 2,379,725	$ 2,185,938
Revenue, Percentage	100.00%	100.00%	100.00%	100.00%
U.S. Facilities [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 216,050	$ 212,328	$ 621,702	$ 625,330
Revenue, Percentage	26.50%	28.30%	26.10%	28.60%
U.S. Facilities [Member] | Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 118,022	$ 117,348	$ 339,117	$ 335,819
Revenue, Percentage	14.50%	15.60%	14.30%	15.40%
U.S. Facilities [Member] | Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 454,319	$ 400,483	$ 1,343,081	$ 1,156,766
Revenue, Percentage	55.70%	53.40%	56.40%	52.90%
U.S. Facilities [Member] | Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 14,824	$ 15,524	$ 44,764	$ 52,026
Revenue, Percentage	1.80%	2.10%	1.90%	2.40%
U.S. Facilities [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 12,419	$ 4,651	$ 31,061	$ 15,997
Revenue, Percentage	1.50%	0.60%	1.30%	0.70%