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Revenue - Schedule of Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 3,153,963	$ 2,928,738	$ 2,610,399
U.S. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,153,963	2,928,738	2,610,399
U.S. Facilities [Member] | Acute Inpatient Psychiatric Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,678,266	1,489,248	1,330,757
U.S. Facilities [Member] | Specialty Treatment Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	592,023	614,220	564,671
U.S. Facilities [Member] | Comprehensive Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	537,886	500,242	419,940
U.S. Facilities [Member] | Residential Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 345,788	$ 325,028	$ 295,031

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