Segment Reporting (Parenthetical) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net revenues		$ 13,399,370	$ 12,642,117	$ 11,558,897
Total assets		13,494,188	13,093,543	13,476,879
Provision for asset impairment		57,550	14,391	0
Behavioral Health Services
Segment Reporting Information [Line Items]
Net revenues	[1]	5,729,758	5,503,644	5,208,722
Total assets	[1]	7,277,293	7,250,427	7,044,617
Behavioral Health Services | Located in U.K.
Segment Reporting Information [Line Items]
Net revenues		685,000	688,000	584,000
Total assets		1,235,000	$ 1,351,000	$ 1,334,000
Trade Names | Real Property Assets | Behavioral Health Services
Segment Reporting Information [Line Items]
Provision for asset impairment		$ 58

[1] Includes net revenues generated from our behavioral health care facilities located in the U.K. amounting to approximately $685 million in 2022, $688 million in 2021 and $584 million in 2020. Total assets at our U.K. behavioral health care facilities were approximately $1.235 billion as of December 31, 2022, $1.351 billion as of December 31, 2021 and $1.334 billion as of December 31, 2020.