Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 3,932,407		$ 3,909,456
Goodwill acquired during the period	13,252		4,598
Goodwill divested during the period	(5,298)		(6,062)
Adjustments to goodwill	(7,482)	[1]	24,415
Goodwill, Ending Balance	3,932,879		3,932,407
Acute Care Services
Goodwill [Line Items]
Goodwill, Beginning Balance	516,628		516,626
Goodwill acquired during the period	13,252		0
Goodwill divested during the period	0		0
Adjustments to goodwill	0	[1]	2
Goodwill, Ending Balance	529,880		516,628
Behavioral Health Services
Goodwill [Line Items]
Goodwill, Beginning Balance	3,415,779		3,392,830
Goodwill acquired during the period	0		4,598
Goodwill divested during the period	(5,298)		(6,062)
Adjustments to goodwill	(7,482)	[1]	24,413
Goodwill, Ending Balance	$ 3,402,999		$ 3,415,779

[1] The changes in the Behavioral Health Services’ goodwill consist of foreign currency translation adjustments.