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v3.23.2

Income Taxes and Related Payments - Changes in Deferred Tax Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Deferred Tax Asset - Amortizable Basis |  |  |  |
Deferred tax assets, beginning |  |  | $ 426,468 |
2023 Holdings Common Unit Exchanges |  |  | 1,412 |
Amortization |  |  | (21,891) |
Deferred tax assets, ending | $ 405,989 |  | 405,989 |
Amounts Payable Under TRAs |  |  |  |
Amounts payable under tax receivable, beginning agreements |  |  | 398,789 |
Establishment of amounts payable under tax receivable agreements |  |  | 1,200 | $ 661
Payment under the tax receivable agreements |  |  | (27,176) | (25,112)
Change in estimate | 0 | $ 0 | 0 | $ (482)
Amounts payable under tax receivable, ending agreements | $ 372,813 |  | 372,813 |
Capital Unit |  |  |  |
Amounts Payable Under TRAs |  |  |  |
Establishment of amounts payable under tax receivable agreements |  |  | $ 1,200 |

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- Definition Amortization of deferred tax asset related to tax receivable agreements. + References No definition available. + Details
Name: | apam_AmortizationofTRADTA
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amounts payable under tax receivable agreement. + References No definition available. + Details
Name: | apam_AmountsPayableUnderTaxReceivableAgreement
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred Tax Asset [Roll Forward] + References No definition available. + Details
Name: | apam_DeferredTaxAssetRollForward
Namespace Prefix: | apam_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Deferred Tax Assets, Exchanges + References No definition available. + Details
Name: | apam_DeferredTaxAssetsExchanges
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Deferred tax assets recorded as a result of the step-up of tax basis from the H&F Corp Merger and the purchase of Class A common units by APAM. + References No definition available. + Details
Name: | apam_DeferredTaxAssetsStepUpOfTaxBasis
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net Gain Loss On The Tax Receivable Agreements + References No definition available. + Details
Name: | apam_NetGainLossOnTheTaxReceivableAgreements
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Initial establishment of the estimated liability associated with the tax benefits expected to be realized as a result of the tax receivable agreements. + References No definition available. + Details
Name: | apam_NonCashTransactionInitialEstablishmentOfAmountsPayableUnderTaxReceivableAgreements
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Tax Receivable Agreement Payments + References No definition available. + Details
Name: | apam_TaxReceivableAgreementPayments
Namespace Prefix: | apam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Tax Receivable Agreements [Roll Forward] + References No definition available. + Details
Name: | apam_TaxReceivableAgreementsRollForward
Namespace Prefix: | apam_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | apam_HoldingsCommonUnitExchangesAxis=apam_CapitalUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |