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Revenue - Schedule of Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 796,040	$ 731,337	$ 1,564,091	$ 1,435,604
U.S. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	796,040	731,337	1,564,091	1,435,604
U.S. Facilities [Member] | Acute Inpatient Psychiatric Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	423,383	369,415	829,805	731,226
U.S. Facilities [Member] | Specialty Treatment Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	151,049	156,908	294,881	304,211
U.S. Facilities [Member] | Comprehensive Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	134,643	123,472	266,810	238,973
U.S. Facilities [Member] | Residential Treatment Centers [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 86,965	$ 81,542	$ 172,595	$ 161,194

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