Net Assets of Consolidated Investment Products

No definition available.

Name:	apam_NetAssetsofConsolidatedInvestmentProducts
Namespace Prefix:	apam_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Net Assets of Consolidated Investment Products, Carrying Value

+ References

No definition available.

+ Details

Name:	apam_NetAssetsofConsolidatedInvestmentProductsCarryingValue
Namespace Prefix:	apam_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Net Assets of Consolidated Investment Products Measured at Fair Value

+ References

No definition available.

+ Details

Name:	apam_NetAssetsofConsolidatedInvestmentProductsMeasuredatFairValue
Namespace Prefix:	apam_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-4

+ Details

Name:	us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate amount of liabilities as of the balance sheet date for obligations incurred in connection with the entity's investments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

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

- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-11

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480078/944-80-55-14

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480078/944-80-55-9

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(h))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_Investments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479887/480-10-S45-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479857/480-10-S50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479887/480-10-S45-3

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3A
-Subparagraph (24)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (01)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1

+ Details

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

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-6

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-4

+ Details

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

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_DerivativeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_RepurchaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Variable Interest Entities and Consolidated Investment Products - Assets, Liabilities and Equity of the Fund (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Liabilities
Redeemable noncontrolling interests	$ 256,194	$ 327,917
Artisan’s direct equity investment in CIPs	107,200
Variable Interest Entity, Primary Beneficiary
ASSETS
Cash and cash equivalents	42,025	67,046	$ 25,851
Investments	329,296	462,140
Liabilities
Investment liabilities, at fair value	898	7,780
Net CIP assets included in the table above	359,585	512,599
Net CIP assets/(liabilities) not included in the table above	3,803	(88,191)
Total Net CIP assets	363,388	424,408
Artisan’s direct equity investment in CIPs	107,194	96,491
Variable Interest Entity, Primary Beneficiary \| Money market funds \| Fair Value, Measurements, Recurring
ASSETS
Cash and cash equivalents	31,187	58,239
Variable Interest Entity, Primary Beneficiary \| Money market funds \| Fair Value, Measurements, Recurring \| Level 1
ASSETS
Cash and cash equivalents	31,187	58,239
Variable Interest Entity, Primary Beneficiary \| Money market funds \| Fair Value, Measurements, Recurring \| Level 2
ASSETS
Cash and cash equivalents	0	0
Variable Interest Entity, Primary Beneficiary \| Money market funds \| Fair Value, Measurements, Recurring \| Level 3
ASSETS
Cash and cash equivalents	0	0
Variable Interest Entity, Primary Beneficiary \| Equity securities - long position \| Fair Value, Measurements, Recurring
ASSETS
Investments	150,368	72,547
Variable Interest Entity, Primary Beneficiary \| Equity securities - long position \| Fair Value, Measurements, Recurring \| Level 1
ASSETS
Investments	150,368	70,642
Variable Interest Entity, Primary Beneficiary \| Equity securities - long position \| Fair Value, Measurements, Recurring \| Level 2
ASSETS
Investments	0	1,905
Variable Interest Entity, Primary Beneficiary \| Equity securities - long position \| Fair Value, Measurements, Recurring \| Level 3
ASSETS
Investments	0	0
Variable Interest Entity, Primary Beneficiary \| Fixed income instruments - long position \| Fair Value, Measurements, Recurring
ASSETS
Investments	176,864	381,556
Liabilities
Investment liabilities, at fair value		7,013
Variable Interest Entity, Primary Beneficiary \| Fixed income instruments - long position \| Fair Value, Measurements, Recurring \| Level 1
ASSETS
Investments	0	0
Liabilities
Investment liabilities, at fair value		0
Variable Interest Entity, Primary Beneficiary \| Fixed income instruments - long position \| Fair Value, Measurements, Recurring \| Level 2
ASSETS
Investments	167,335	359,597
Liabilities
Investment liabilities, at fair value		7,013
Variable Interest Entity, Primary Beneficiary \| Fixed income instruments - long position \| Fair Value, Measurements, Recurring \| Level 3
ASSETS
Investments	9,529	21,959
Liabilities
Investment liabilities, at fair value		0
Variable Interest Entity, Primary Beneficiary \| Derivative assets \| Fair Value, Measurements, Recurring
ASSETS
Investments	2,064	934
Liabilities
Investment liabilities, at fair value	898	516
Variable Interest Entity, Primary Beneficiary \| Derivative assets \| Fair Value, Measurements, Recurring \| Level 1
ASSETS
Investments	34	237
Liabilities
Investment liabilities, at fair value	88	0
Variable Interest Entity, Primary Beneficiary \| Derivative assets \| Fair Value, Measurements, Recurring \| Level 2
ASSETS
Investments	2,030	697
Liabilities
Investment liabilities, at fair value	806	516
Variable Interest Entity, Primary Beneficiary \| Derivative assets \| Fair Value, Measurements, Recurring \| Level 3
ASSETS
Investments	0	0
Liabilities
Investment liabilities, at fair value	$ 4	0
Variable Interest Entity, Primary Beneficiary \| Private Equity Funds \| Fair Value, Measurements, Recurring
ASSETS
Investments		7,103
Variable Interest Entity, Primary Beneficiary \| Private Equity Funds \| Fair Value, Measurements, Recurring \| Level 1
ASSETS
Investments		0
Variable Interest Entity, Primary Beneficiary \| Private Equity Funds \| Fair Value, Measurements, Recurring \| Level 2
ASSETS
Investments		0
Variable Interest Entity, Primary Beneficiary \| Private Equity Funds \| Fair Value, Measurements, Recurring \| Level 3
ASSETS
Investments		7,103
Variable Interest Entity, Primary Beneficiary \| Repurchase Agreements \| Fair Value, Measurements, Recurring
Liabilities
Investment liabilities, at fair value		251
Variable Interest Entity, Primary Beneficiary \| Repurchase Agreements \| Fair Value, Measurements, Recurring \| Level 1
Liabilities
Investment liabilities, at fair value		0
Variable Interest Entity, Primary Beneficiary \| Repurchase Agreements \| Fair Value, Measurements, Recurring \| Level 2
Liabilities
Investment liabilities, at fair value		251
Variable Interest Entity, Primary Beneficiary \| Repurchase Agreements \| Fair Value, Measurements, Recurring \| Level 3
Liabilities
Investment liabilities, at fair value		$ 0