XML 67 R57.htm IDEA: XBRL DOCUMENT
v3.21.2

Property and Equipment - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) Bed
Property Plant And Equipment [Abstract] |  |
Number of beds, replacement facility | Bed |  | 260
Non-cash property impairment charge relating to existing facility | $ | $ 1.1 | $ 23.2

X
- Definition Number of beds replacement facility. + References No definition available. + Details
Name: | achc_NumberOfBedsReplacementFacility
Namespace Prefix: | achc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2611-110228 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration