Segment Reporting (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net revenues	$ 4,099,720	$ 3,843,582
Total assets	14,875,430		$ 14,469,749
Behavioral Health Services
Segment Reporting Information [Line Items]
Net revenues	1,747,649	1,656,067
Behavioral Health Services \| Located in U.K.
Segment Reporting Information [Line Items]
Net revenues	$ 227,000	$ 208,000

Amount of asset recognized for present right to economic benefit.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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