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Revenue - Schedule of Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 3,312,769	$ 3,153,963	$ 2,928,738
U.S. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,312,769	3,153,963	2,928,738
U.S. Facilities [Member] | Acute Inpatient Psychiatric Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,830,324	1,678,266	1,489,248
U.S. Facilities [Member] | Specialty Treatment Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	567,196	592,023	614,220
U.S. Facilities [Member] | Comprehensive Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	567,176	537,886	500,242
U.S. Facilities [Member] | Residential Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 348,073	$ 345,788	$ 325,028

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