XML 41 R31.htm IDEA: XBRL DOCUMENT
v3.23.2

Compensation and Benefits (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Components of Compensation Expense | Total compensation and benefits consists of the following:
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Salaries, incentive compensation and benefits (1) | $ | 116,326 |  |  | $ | 115,463 |  |  | $ | 231,876 |  |  | $ | 242,658 |
Long-term cash incentive compensation expense | 6,360 |  |  | 1,963 |  |  | 13,344 |  |  | 4,612 |
Restricted share-based award compensation expense | 7,747 |  |  | 9,968 |  |  | 16,725 |  |  | 20,056 |
Long-term incentive compensation expense | 14,107 |  |  | 11,931 |  |  | 30,069 |  |  | 24,668 |
Total compensation and benefits | $ | 130,433 |  |  | $ | 127,394 |  |  | $ | 261,945 |  |  | $ | 267,326 |
(1) Excluding long-term incentive compensation expense
Restricted Share-Based Award Activity | The following tables summarize the restricted share-based award activity for the six months ended June 30, 2023:
| Weighted-Average Grant Date Fair Value |  | Restricted Stock Awards and Restricted Stock Units
Unvested at January 1, 2023 | $ | 39.09 |  |  | 5,396,343 |
Granted | 34.99 |  |  | 517,386 |
Forfeited | 43.40 |  |  | (17,916) |
Vested | 37.55 |  |  | (542,487) |
Unvested at June 30, 2023 | $ | 38.84 |  |  | 5,353,326 |
Nonvested Restricted Stock Shares Activity |
| Weighted-Average Grant Date Fair Value |  | Performance Share Units
Unvested at January 1, 2023 | $ | 58.13 |  |  | 231,170 |
Granted | — |  |  | — |
Forfeited | — |  |  | — |
Vested (1) | 34.97 |  |  | (15,000) |
Unvested at June 30, 2023 | $ | 54.89 |  |  | 216,170 |
(1) During the six months ended June 30, 2023, the 60,000 PSUs granted in 2020 met the requisite three-year performance conditions, resulting in the potential vesting of 150% of the PSUs, or 90,000 shares of Class A common stock. 45,000 shares of Class A common stock were promptly delivered at that time, while the remaining 45,000 PSUs remain subject to the qualified retirement vesting condition.
Change in Value of Investments | The change in value of the investments had the following impact on the unaudited consolidated statements of operations:
|  | For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
Statement of Operations Section | Statement of Operations Line Item | 2023 |  | 2022 |  | 2023 |  | 2022
Operating expenses (benefit) | Compensation and benefits | $ | 714 |  |  | $ | (1,941) |  |  | $ | 2,446 |  |  | $ | (2,648) |
Non-operating income (expense) | Other net investment gain (loss) | 3,563 |  |  | (12,244) |  |  | 10,581 |  |  | (15,205) |

X
- Definition Tabular disclosure of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense. + References No definition available. + Details
Name: | apam_ScheduleOfLaborAndRelatedExpenseTableTextBlock
Namespace Prefix: | apam_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI https://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI https://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI https://asc.fasb.org/topic&trid=2196965 + Details
Name: | us-gaap_InvestmentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration