Segment Reporting (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues		$ 2,829,667	$ 2,804,391
Total assets		11,620,426	11,721,277	$ 11,668,250
Behavioral Health Services
Segment Reporting Information [Line Items]
Net revenues	[1]	1,306,109	1,286,383
Total assets	[1]	6,871,852	6,972,929
Behavioral Health Services | Located in U.K.
Segment Reporting Information [Line Items]
Net revenues		137,000	137,000
Total assets		$ 1,197,000	$ 1,237,000

[1] Includes net revenues generated from our behavioral health care facilities located in the U.K. amounting to approximately $137 million for each of the three-month periods ended March 31, 2020 and 2019. Total assets at our U.K. behavioral health care facilities were approximately $1.197 billion and $1.237 billion as of March 31, 2020 and 2019.