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Income Taxes and Related Payments - Additional information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) TRA	Mar. 31, 2024	Dec. 31, 2024 USD ($)
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%
Approximate percentage of earnings not subject to income taxes	14.00%
Effective tax rate	20.60%	20.20%
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	$ 1,800		$ 1,800
Unrecognized tax benefits, income tax penalties accrued	$ 200		$ 200

X

- Definition

Represents the percentage of earnings attributable to noncontrolling interests and therefore not subject to income taxes.

+ References

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- Definition

Income Tax Disclosure, Number of Tax Receivable Agreements

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X

- Definition

Represents the expected payment date for payments made under the TRA, which is defined as the number of days from the date APAM's federal income tax return is filed for each fiscal year.

+ References

No definition available.

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X

- 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.

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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) retained by the entity.

+ References

No definition available.

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Name Accounting Standards Codification
-Section 50
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- Definition

Amount of unrecognized tax benefits.

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- Definition

Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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