Additional relief received amount from U.S. government for eligible healthcare providers under the CARES Act.

No definition available.

Name:	achc_AdditionalReliefReceived
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Additional relief to eligible health care providers.

+ References

No definition available.

+ Details

Name:	achc_AdditionalReliefToEligibleHealthCareProviders
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of advance payment received under the CARES Act.

+ References

No definition available.

+ Details

Name:	achc_AmountOfAdvancePaymentReceived
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

CARES Act.

+ References

No definition available.

+ Details

Name:	achc_CARESActLineItems
Namespace Prefix:	achc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash benefit relating to delay of payment of social security payroll taxes.

+ References

No definition available.

+ Details

Name:	achc_CashBenefitRelatingToDelayOfPaymentOfSocialSecurityPayrollTaxes
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Contract with customer liability advance repayments.

+ References

No definition available.

+ Details

Name:	achc_ContractWithCustomerLiabilityAdvanceRepayments
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Expected repay of payroll tax deferrals.

+ References

No definition available.

+ Details

Name:	achc_ExpectedRepayOfPayrollTaxDeferrals
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total amount of income from provider relief funds granted as part of the CARES Act.

+ References

No definition available.

+ Details

Name:	achc_IncomeFromProviderReliefFund
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Received relief amount from U.S. government for eligible healthcare providers under the CARES Act.

+ References

No definition available.

+ Details

Name:	achc_InitialReliefReceived
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of decrease in Medicare reimbursement rate.

+ References

No definition available.

+ Details

Name:	achc_PercentageOfDecreaseInMedicareReimbursementRate
Namespace Prefix:	achc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of increase in medicare reimbursement rate.

+ References

No definition available.

+ Details

Name:	achc_PercentageOfIncreaseInMedicareReimbursementRate
Namespace Prefix:	achc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Repayments of medicare advance payments.

+ References

No definition available.

+ Details

Name:	achc_RepaymentsOfMedicareAdvancePayments
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The U.S. government offer of relief to eligible healthcare providers as part of the CARES Act.

+ References

No definition available.

+ Details

Name:	achc_TotalReliefToEligibleHealthcareProviders
Namespace Prefix:	achc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_MajorCustomersAxis=achc_MedicareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=achc_CoronavirusAidReliefAndEconomicSecurityActMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=achc_PublicHealthAndSocialServicesEmergencyFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=achc_AmericanRescuePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=achc_CentersForMedicareAndMedicaidServicesCARESActAcceleratedAndAdvancePaymentProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

The CARES Act - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended	12 Months Ended
	Apr. 24, 2020	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2020	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
C A R E S Act [Line Items]
Income from relief fund		$ 8,550			$ 8,550
Expected repay of payroll tax deferrals			$ 39,000
Medicare [Member]
C A R E S Act [Line Items]
Repayments of medicare advance payments		$ 7,000			15,000
CARES Act [Member]
C A R E S Act [Line Items]
Offer of eligible relief amount				$ 100,000
Additional offer of eligible relief amount	$ 75,000
Cash benefit relating to delay of payment of social security payroll taxes					$ 39,000
CARES Act [Member] \| Medicare [Member]
C A R E S Act [Line Items]
Repayment of advanced payments						$ 25,000
Percentage of increase in medicare reimbursement rate							2.00%
Percentage of reduced in medicare reimbursement rate		1.00%			1.00%
CARES Act [Member] \| Public Health and Social Services Emergency Fund [Member]
C A R E S Act [Line Items]
Receipt of CARES Act of 2020 aid amount							$ 34,900
Income from relief fund		$ 8,600				17,900	32,800
Receipt of additional CARES Act of 2020 aid amount		7,700				$ 24,200
CARES Act [Member] \| Public Health and Social Services Emergency Fund [Member] \| American Rescue Plan
C A R E S Act [Line Items]
Receipt of additional CARES Act of 2020 aid amount		$ 14,200
CARES Act [Member] \| CMS' Accelerated and Advance Payment Program [Member] \| Medicare [Member]
C A R E S Act [Line Items]
Amount of advance payment received							$ 45,000