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Income Taxes and Related Payments - Additional information (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 USD ($) TRA | Sep. 30, 2024 | Dec. 31, 2024 USD ($)
Income Tax Disclosure [Abstract] |  |  |
Statutory tax rate | 21.00% |  |
Approximate percentage of earnings not subject to income taxes | 14.00% |  |
Effective tax rate | 24.00% | 19.90% |
Number of tax receivable agreements (TRAs) | TRA | 2 |  |
TRA percent of savings to be paid to shareholders | 85.00% |  |
Tax receivable agreement percentage to be retained by entity | 15.00% |  |
Tax receivable agreement payment period | 125 days |  |
Unrecognized tax benefits | $ 2,200 |  | $ 1,800
Unrecognized tax benefits, income tax penalties accrued | $ 300 |  | $ 200
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent | 3.10% |  |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits | $ 10,700 |  |

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- Definition Portion of the applicable cash savings, if any, in U.S. federal and state income tax that APAM actually realizes (or is deemed to realize in certain circumstances) to be paid to the holders of convertible preferred stock issued as consideration for the H&F Corp Merger (or Class A common stock issued upon conversion of that convertible preferred stock). + References No definition available. + Details
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