Debt Instrument, Covenant, Interest Coverage Ratio, Minimum

No definition available.

Name:	asth_DebtInstrumentCovenantInterestCoverageRatioMinimum
Namespace Prefix:	asth_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Leverage Ratio, Maximum

+ References

No definition available.

+ Details

Name:	asth_DebtInstrumentCovenantLeverageRatioMaximum
Namespace Prefix:	asth_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Distribution of shares.

+ References

No definition available.

+ Details

Name:	asth_DistributionOfShares
Namespace Prefix:	asth_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of distribution payable to ownership interest holder from investment income and return of capital.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(10)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 405
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478790/946-405-45-2

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

+ Details

Name:	us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=asth_AmendedCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=asth_AsOfLastDayOfEachFiscalQuarterEndingPriorToMarchThirtyOneTwoThousandTwentySevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=asth_AsOfLastDayEachFiscalQuarterThereafterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=asth_AsOfLastDayOfEachFiscalQuarterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=asth_SecuredOvernightFinancingRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=asth_AlliedPacificOfCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=asth_TermLoanAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_DelayedDrawTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Details) $ in Millions						12 Months Ended
	Jun. 30, 2025	Feb. 26, 2025 USD ($)	Jan. 17, 2025 USD ($) shares	Nov. 14, 2023 USD ($)	Jun. 16, 2021 USD ($)	Dec. 31, 2024 USD ($)	Feb. 28, 2025 USD ($)	Jan. 15, 2025 shares	Sep. 08, 2023 USD ($)
Subsequent Event [Line Items]
Aggregate purchase price				$ 100.0		$ 0.9
Amended Credit Agreement \| As of the Last Day of Each Fiscal Quarter Ending Prior to March 31, 2027
Subsequent Event [Line Items]
Maximum consolidated leverage ratio (not greater than)	5
Amended Credit Agreement \| As of Last Day Each Fiscal Quarter Thereafter
Subsequent Event [Line Items]
Maximum consolidated leverage ratio (not greater than)	4.5
Amended Credit Agreement \| As of Last Day of Each Fiscal Quarter
Subsequent Event [Line Items]
Minimum consolidated interest coverage ratio (not less than)	2.5
Amended Credit Agreement \| Letter of Credit
Subsequent Event [Line Items]
Maximum loan availability					$ 25.0				$ 50.0
Revolver Loan \| Amended Credit Agreement
Subsequent Event [Line Items]
Revolving credit facility term					5 years
Maximum loan availability					$ 400.0
Secured Overnight Financing Rate \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Basis spread on variable rate					1.25%	1.50%
Secured Overnight Financing Rate \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Basis spread on variable rate					2.50%	2.75%
Base Rate \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Basis spread on variable rate					0.25%	0.50%
Base Rate \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Basis spread on variable rate					1.50%	1.75%
Subsequent Event \| Allied Pacific of California
Subsequent Event [Line Items]
Distribution of shares \| shares								699,896
Cash distribution							$ 5.5
Repurchase of shares \| shares			300,000
Aggregate purchase price			$ 10.6
Subsequent Event \| Amended Credit Agreement
Subsequent Event [Line Items]
Maximum loan availability		$ 25.0
Subsequent Event \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Line of credit facility, unused capacity commitment fee percentage		0.175%
Subsequent Event \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Line of credit facility, unused capacity commitment fee percentage		0.35%
Subsequent Event \| Amended Credit Agreement \| Letter of Credit
Subsequent Event [Line Items]
Maximum loan availability		$ 100.0
Subsequent Event \| Revolver Loan \| Amended Credit Agreement
Subsequent Event [Line Items]
Revolving credit facility term		5 years
Maximum loan availability		$ 300.0
Subsequent Event \| Term Loan A \| Amended Credit Agreement
Subsequent Event [Line Items]
Revolving credit facility term		5 years
Maximum loan availability		$ 250.0
Subsequent Event \| Delayed Draw Term Loan \| Amended Credit Agreement
Subsequent Event [Line Items]
Revolving credit facility term		5 years
Maximum loan availability		$ 745.0
Subsequent Event \| Delayed Draw Term Loan \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Line of credit facility, unused capacity commitment fee percentage		0.175%
Subsequent Event \| Delayed Draw Term Loan \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Line of credit facility, unused capacity commitment fee percentage		0.35%
Subsequent Event \| Secured Overnight Financing Rate \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Basis spread on variable rate		1.25%
Subsequent Event \| Secured Overnight Financing Rate \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Basis spread on variable rate		2.50%
Subsequent Event \| Base Rate \| Amended Credit Agreement \| Minimum
Subsequent Event [Line Items]
Basis spread on variable rate		0.25%
Subsequent Event \| Base Rate \| Amended Credit Agreement \| Maximum
Subsequent Event [Line Items]
Basis spread on variable rate		1.50%