    <SEC-DOCUMENT>0001140361-25-013294-index.html : 20250410
    <SEC-HEADER>0001140361-25-013294.hdr.sgml : 20250410
    <ACCEPTANCE-DATETIME>20250410170230
    ACCESSION NUMBER:		0001140361-25-013294
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		25
    CONFORMED PERIOD OF REPORT:	20250529
    FILED AS OF DATE:		20250410
    DATE AS OF CHANGE:		20250410

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Acadia Healthcare Company, Inc.
    		CENTRAL INDEX KEY:			0001520697
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-SPECIALTY OUTPATIENT FACILITIES, NEC [8093]
    		ORGANIZATION NAME:           	08 Industrial Applications and Services
    		EIN:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35331
    		FILM NUMBER:		25829110

    	BUSINESS ADDRESS:
    		STREET 1:		6100 TOWER CIRCLE
    		STREET 2:		SUITE 1000
    		CITY:			FRANKLIN
    		STATE:			TN
    		ZIP:			37067
    		BUSINESS PHONE:		615-861-6000

    	MAIL ADDRESS:
    		STREET 1:		6100 TOWER CIRCLE
    		STREET 2:		SUITE 1000
    		CITY:			FRANKLIN
    		STATE:			TN
    		ZIP:			37067
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>ny20042551x1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: ny20042551x1_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>2
    <FILENAME>achc-20250529.xsd
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - SCHEMA
    <TEXT>
    Document 2 - file: achc-20250529.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>3
    <FILENAME>achc-20250529_def.xml
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - DEFINITION LINKBASE
    <TEXT>
    Document 3 - file: achc-20250529_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>achc-20250529_lab.xml
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - LABEL LINKBASE
    <TEXT>
    Document 4 - file: achc-20250529_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>achc-20250529_pre.xml
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - PRESENTATION LINKBASE
    <TEXT>
    Document 5 - file: achc-20250529_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ny20042551x1_image01.jpg
    <TEXT>
    Document 6 - file: ny20042551x1_image01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ny20042551x1_image02.jpg
    <TEXT>
    Document 7 - file: ny20042551x1_image02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ny20042551x1_image03.jpg
    <TEXT>
    Document 8 - file: ny20042551x1_image03.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ny20042551x1_image04.jpg
    <TEXT>
    Document 9 - file: ny20042551x1_image04.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>ny20042551x1_image05.jpg
    <TEXT>
    Document 10 - file: ny20042551x1_image05.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>ny20042551x1_image06.jpg
    <TEXT>
    Document 11 - file: ny20042551x1_image06.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>ny20042551x1_image07.jpg
    <TEXT>
    Document 12 - file: ny20042551x1_image07.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>ny20042551x1_image08.jpg
    <TEXT>
    Document 13 - file: ny20042551x1_image08.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>ny20042551x1_image09.jpg
    <TEXT>
    Document 14 - file: ny20042551x1_image09.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>R4.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: R4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>20
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: FilingSummary.html

    Document 23 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>25
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 25 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>26
    <FILENAME>0001140361-25-013294-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: 0001140361-25-013294-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>27
    <FILENAME>ny20042551x1_def14a_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: ny20042551x1_def14a_htm.html

    Document 27 - RAW XML: ny20042551x1_def14a_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>