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Revenue - Schedule of Revenue and Percentage Generated by Each Payor Type (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue, Major Customer [Line Items]
Revenue	$ 869,232	$ 796,040	$ 1,639,737	$ 1,564,091
U.S. Facilities [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 869,232	$ 796,040	$ 1,639,737	$ 1,564,091
Revenue, Percentage	100.00%	100.00%	100.00%	100.00%
U.S. Facilities [Member] | Commercial [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 209,000	$ 209,636	$ 401,755	$ 405,653
Revenue, Percentage	24.00%	26.30%	24.50%	25.90%
U.S. Facilities [Member] | Medicare [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 119,505	$ 111,708	$ 234,259	$ 221,096
Revenue, Percentage	13.70%	14.00%	14.30%	14.10%
U.S. Facilities [Member] | Medicaid [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 516,389	$ 452,338	$ 947,203	$ 888,760
Revenue, Percentage	59.50%	56.90%	57.70%	56.90%
U.S. Facilities [Member] | Self-Pay [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 12,698	$ 13,513	$ 30,863	$ 29,940
Revenue, Percentage	1.50%	1.70%	1.90%	1.90%
U.S. Facilities [Member] | Other [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 11,640	$ 8,845	$ 25,657	$ 18,642
Revenue, Percentage	1.30%	1.10%	1.60%	1.20%

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Percentage of net health care organization revenue.

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