XML 45 R44.htm IDEA: XBRL DOCUMENT
v3.20.1

Noncontrolling interest - Holdings Share Issuances & Cancellations (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 0 |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) | 2.00% |
Restricted share award net share settlement (in shares) | (126,971) |
Issuance of Class A common stock, net of issuance costs | $ 62,825 | $ (10)
Delivery of Shares Underlying RSUs (in shares) | 24,233 |
Artisan Partners Holdings LP |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Ending balance | 77.00% |
Follow On Offering |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 0 |
Class A Common Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Restricted share award net share settlement (in shares) | (126,971) |
Delivery of Shares Underlying RSUs (in shares) | 24,233 |
Class A Common Stock | Follow On Offering |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 1,802,326 |
Holdings GP Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance (in shares) | 56,429,825 |
Ending balance (in shares) | 60,647,331 |
Holdings GP Units | Follow On Offering |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 1,802,326 |
Limited Partnership Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance (in shares) | 21,372,029 |
Holdings common unit exchanges (in shares) | (1,626,611) |
Restricted share award net share settlement (in shares) | 0 |
Forfeitures of Holdings GP Units from Employee Terminations (in shares) | 0 |
Ending balance (in shares) | 17,943,092 |
Delivery of Shares Underlying RSUs (in shares) | 0 |
Limited Partnership Units | Follow On Offering |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 1,802,326 |
Capital Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance (in shares) | 77,801,854 |
Holdings common unit exchanges (in shares) | 0 |
Holdings of common unit exchanges, APAM ownership percentage | 2.00% |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) | 0.00% |
Restricted share award net share settlement (in shares) | (126,971) |
Forfeitures of Holdings GP Units from Employee Terminations (in shares) | (24,778) |
Ending balance (in shares) | 78,590,423 |
Capital Units | Artisan Partners Holdings LP |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 73.00% |
Ending balance | 77.00% |
Restricted Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 916,085 |
Restricted Stock | Class A Common Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 916,085 |
Restricted Stock | Limited Partnership Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 0 |
Restricted Stock | Capital Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Shares issued (in shares) | 916,085 |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) | 0.00% |
Capital Units |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Change in APAM economic ownership Interest in Artisan Partners Holdings LP (as a percent) | 0.00% |

X
- Definition Change in APAM Economic Ownership Interest in Artisan Partners Holdings LP (as a percent) + References No definition available. + Details
Name: | apam_ChangeinAPAMEconomicOwnershipInterestinArtisanPartnersHoldingsLPasapercent
Namespace Prefix: | apam_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Noncontrolling Interest, Increase (Decrease) Ownership Interest, Exchange of Units, Percent + References No definition available. + Details
Name: | apam_NoncontrollingInterestIncreaseDecreaseOwnershipInterestExchangeofUnitsPercent
Namespace Prefix: | apam_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
Name: | us-gaap_CapitalUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_IncreaseDecreaseInStockholdersEquityRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units or equivalent units outstanding for all classes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_UnitsOfPartnershipInterestAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_OwnershipAxis=apam_ArtisanPartnersHoldingsLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=apam_FollowOnOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=apam_GeneralPartnershipUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=apam_LimitedPartnershipUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CapitalUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | apam_EmployeePartnerTerminationsAxis=us-gaap_CapitalUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |