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Revenue - Schedule of Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 869,232	$ 796,040	$ 1,639,737	$ 1,564,091
U.S. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	869,232	796,040	1,639,737	1,564,091
U.S. Facilities [Member] | Acute Inpatient Psychiatric Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	495,401	423,383	907,633	829,805
U.S. Facilities [Member] | Specialty Treatment Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	145,755	151,049	282,729	294,881
U.S. Facilities [Member] | Comprehensive Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	141,522	134,643	278,507	266,810
U.S. Facilities [Member] | Residential Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 86,554	$ 86,965	$ 170,868	$ 172,595

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