The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Acquisitions - Additional Information (Detail) $ in Millions	Dec. 31, 2021 USD ($) Bed Hospital Location	Apr. 01, 2019 USD ($) Bed	Feb. 15, 2019 USD ($) Bed Center
Business Acquisition [Line Items]
Number of beds \| Bed	10,500
CenterPointe Behavioral Health System, LLC [Member]
Business Acquisition [Line Items]
Business acquisition cash consideration	$ 139.0
Revolving Facility	$ 70.0
Number of acute inpatient hospitals \| Hospital	4
Number of beds \| Bed	306
Number of outpatient locations \| Location	10
Bradford Recovery Center [Member]
Business Acquisition [Line Items]
Business acquisition cash consideration		$ 4.5
Number of beds \| Bed		46
Whittier Pavilion [Member] \| Massachusetts [Member]
Business Acquisition [Line Items]
Business acquisition cash consideration			$ 17.9
Number of beds \| Bed			71
Mission Treatment [Member] \| California, Nevada, Arizona and Oklahoma [Member]
Business Acquisition [Line Items]
Business acquisition cash consideration			$ 22.5
Number of comprehensive treatment centers operates \| Center			9